- .include "asm86.h"
- .include "ti86asm.inc"
- .include "ti86abs.inc"
+;----------------------------------------------------------------------------
+;-------------------------------- NEMESIS -----------------------------------
+;----------------------------------------------- cool arcade-shoot-em-up-game
- .org _asm_exec_ram
+;------- by SHIAR | shiar0@hotmail.com | icq#43840958 | www.shiar.org -------
- nop
- jp Start
- .dw $0001
- .dw Title
- .dw spr_ship
-Title: .db "Nemesis v0.4.720 by Shiar",0
-Start:
- jr init
+;!!! This source should only be used for learning practises, do not !!!
+;!!! alter it, and certainly never distribute an altered version!! !!!
-just_fired = $c0f9 ;byte
-temp1 = $c100 ;word
+;TO DO: levels 12 and 13 | draw bosses 12 and 13 (41/42)
-;-------------------- init ----------------------------------------------------
+;---------------------- nemesis.z80 start -----------------------------------
-init:
- call _runindicoff
+#include "asm86.h"
+#include "ti86asm.inc" ;standard ti86 romcalls
+#include "ti86abs.inc" ;used to save hiscores and stuff
-;-------------------- main menu -----------------------------------------------
+ .org _asm_exec_ram
- call Next_level
- jp play_game
+#define cal call ;just to make it harder for you to understand
+#define psh push ; ^:D
+#define dnz djnz ;Dec&Jump while NonZero becomes Do w.Non-Zero
+
+#define teacherkey ;compiled with teacher key: 88 bytes extra
+
+dispbuffer = $8400 ;$C9FA ;virtual screen (MUST be mod$400=0!!)
+
+_clrWindow = $4a86 ;_clrLCD and _clrScrn
+_ex_ahl_bde = $45f3 ;exchange values between AHL and BDE
+_shracc = $4383 ;like _shlacc but just the opposite :P
+_dispahl = $4a33 ;display value in ahl <100000 (cheap TI)
+_asapvar = $d6fc ;our own variable name (likely "nemesis")
+
+storepos = _asm_exec_ram+7000 ;1024 bytes needed to store things
+
+;---------------------- in-game vars ----------------------------------------
+
+just_fired = storepos ; +0 ;counts how long a blast lasts
+hiscorepos = storepos ; +0 ;entering hiscore name
+
+x = storepos+1 ; +1 ;your ship's position
+y = x+1 ; +2 ;your y-pos
+firex = y+1 ; +3 ;(1 byte)
+firey = firex+1 ; +4 ;(1 byte)
+
+eventleft = firey+1 ; +5 ;nr. of enemies still to come
+level_enemy = eventleft+1 ; +6 ;enemy type
+level_info = level_enemy+1 ; +7 ;ceiling/ground (%00) present
+spacespace = level_info+1 ; +8
+groundinfo = spacespace+1 ; +9
+stars1 = groundinfo+1 ; +10 ;slow stars byte (<< %1)
+stars2 = stars1+1 ; +11 ;fast stars byte (<<< %1)
+groundpos = stars2+1 ; +12 $10
+ceilingpos = groundpos+16 ; +28 $10
+nrstars1 = 10
+starx1 = ceilingpos+16 ; +44 ;20
+nrstars2 = 10
+starx2 = starx1+(nrstars1*2) ; +64 ;20
+
+mm = 4 ;max. number of multiples
+your_prevpos = starx2+(nrstars2*2) ; +84 ;14*mm+2 ;previous positions
+
+
+enemies = storepos+200 ;+200 ;info about each enemy
+enemysize = 11 ;infobytes per enemy
+nrenemies = 16 ;max. nr of enemies
+
+ybullets = enemies+(nrenemies*enemysize) ;60 bytes = 20(state,damg,x,y)
+nrybuls = 128 ;+376\
+ebullets = ybullets+(nrybuls*4) ;+888 ;30 bytes = 10(state,x,y)
+nrebuls = 48
+lvlenemies = ebullets+(nrebuls*3) ;-1032
+
+;enemies:
+; [HP64] [000000:HP left 00:(00=no enemy 01=exploding 1X=normal)]
+; [ship sprite (DW!) or explosion frame] [x] [y] [movetype] [movecounter]
+; [firecounter] [firefreq] [firetype]
+
+;---------------------- introduction ----------------------------------------
+
+ nop ;hello yas/ase/rascall/whathever
+ jp init ;here's the program, but first: a description
+ .dw $0001 ;description type 2 (description + YASicon)
+ .dw Title ;pointer to description (all shells)
+ .dw Icon ;pointer to YAS icon
+
+Title: .db "Nemesis v0.99.99 by SHIAR",0
+
+Icon: .db 8,1 ;icon for YAS: width = 1byte; height = 7bytes
+ .db %11100000 ; ███
+ .db %01111000 ; ████
+ .db %00111110 ; █████
+ .db %01111001 ; ████ █
+ .db %00111110 ; █████
+ .db %01111000 ; ████
+ .db %11100000 ; ███ ;recommend 80x50 screen mode
+ .db 0 ;YAS 0.92 compatibility
+
+;---------------------- init ------------------------------------------------
+
+int_handler: ;new interrupt proc
+ ex af,af' ;just af only (no need for exx)
+ in a,($03) ;read bit 3 port 3
+ bit 3,a ;is ON key pressed?
+ jp z,$0039 ;no: np, return
+ res 0,a ;yes: then we have a problem (freeze), so...
+ out ($03),a ;...mask the ON key interrupts!
+ jp $0039 ;all done, return
+int_end:
+
+init: cal BUSY_OFF ;turns the run-indicator off, obviously
+ cal _clrScrn ;clean the screen
+ xor a ;ld a,0
+ res 2,(iy+13) ;don't scroll the screen
+ cal _flushallmenus ;remove TI menus
+
+FixKeys: ;fixes some key problems like left+down bug
+ im 1
+ ld a,$D4
+ ld bc,$0100
+ ld h,a
+ ld l,c ;ld hl,$D400 (user silent link routine space)
+ ld d,a
+ ld e,b ;ld de,$D401
+ dec a ;ld a,$D3
+ ld (hl),a
+ ldir ;fill $D400-D500 with $D3s (slink/user on)
+ ld hl,int_handler ;new interrupt handler
+ ld d,a
+ ld e,a ;ld de,$D3D3
+ ld bc,int_end-int_handler
+ ldir ;load new handler at ($D3D3)
+ inc a ;ld a,$D4
+ ld i,a
+ im 2
+
+;---------------------- main menu -------------------------------------------
+
+LogoPut:
+ xor a ;white bitmask (a=0)
+ ld hl,logo_nemesis ;from...
+ ld de,VIDEO_MEM+16 ;...to one line from top
+ ld b,e ;ld b,16: one line
+AboveLogo:
+ ld (de),a ;clear/n byte
+ inc de ;next
+ dnz AboveLogo ;repeat for the first line
+ ld bc,16*19 ;logo size
+ ldir ;display one line of logo
+
+ ld hl,16*$33+VIDEO_MEM ;$33 rows down
+ ld b,16*7 ;draw black 7 lines
+ ld a,%11111111 ;horizontal line mask
+underline:
+ ld (hl),a ;draw one piece of the divider-line
+ inc hl ;move right (8 pixels = 1 byte)
+ dnz underline ;repeat
+
+ ld hl,_txt_email ;at the very bottom of tha screen
+ ld (_penCol),hl
+ ld hl,txt_email ;hey, my e-mail address so SEND ME SOMETHING!!
+ cal _vputs ;VERY important, so display in small font ?:}
+
+ set 3,(iy+5) ;set white on black
+ ld de,_txt_about ;near the bottom of the screen
+ ld (_penCol),de ;hl=txt_email++=txt_about
+ cal _vputs ;display version + me
+ res 3,(iy+5) ;return to default black on white
+
+dispmenu:
+ ld de,$0304
+ ld (_curRow),de
+ ld hl,txt_menu1 ;NEW GAME
+ cal _puts
+ ld de,$0305
+ ld (_curRow),de
+ ld hl,txt_menu2 ;CONTINUE GAME
+ cal _puts
+
+menuloop:
+ ld a,0 ;current menu item (0 or 1); 0 by default
+menuitem =$-1
+ ld h,$01 ;selector (*) x-coord. = 1
+ add a,4
+ ld l,a ;y-coord. = sel menu item + 4 = 4/5
+ ld (_curRow),hl ;set position
+ ld a,5 ;'*'
+ cal _putmap ;mark selected menu item
+
+ ld a,l ;y-pos 4/5
+ xor 1 ;invert (4=5; 5=4)
+ ld (_curRow),a ;set new row position
+ ld a,32 ;' ' (empty, just remove any * present)
+ cal _putc
+
+ cal getsomekeys ;read keys (z if enter/2nd pressed)
+ ld hl,menuitem
+ jr z,start_tha_freakin_game
+ cp K_EXIT
+ jr z,menuexit ;exit goes to the g/o screen (first score=0)
+ cp K_UP
+ jr z,menuchange ;up changes selected menu item
+ cp K_DOWN ;down as well
+ jr nz,menuloop ;anything else just loops
+menuchange:
+ ld a,(hl) ;(menuitem)
+ xor 1 ;0=1; 1=0
+ ld (hl),a ;set new menu item
+ jr menuloop ;continue looping
+
+start_tha_freakin_game:
+ ld a,(hl) ;(menuitem)
+ dec a ;new game=0; so that gives -1 = NZ
+ cal nz,New_game ;NEW GAME
+ jp samelevel ;CONTINUE: game_main_loop
+
+menuexit:
+ ld hl,0 ;reset score
+ ld (your_score),hl ;(prevents hiscore while never played)
+ jp game_over ;and go to game over screen
+
+do_invert: ;invert screen (b<>w)
+ psh hl
+ psh af ;can't destroy b
+ ld hl,_invert
+ ld a,$98
+ xor (hl) ;$2F (cpl) <-> $B7 (or a)
+ ld (hl),a
+ pop af
+ pop hl
+ ret
-;-------------------- exit ----------------------------------------------------
+mode_invert:
+ ld hl,invertmode ;change invert mode (will be stored)
+ ld a,$98
+ xor (hl) ;$2F (cpl) <-> $B7 (or a)
+ ld (hl),a
+ ld de,1
+ psh de ;size
+ psh hl ;dest (invertmode)
+ ld hl,4+invertmode-_asm_exec_ram
+ psh hl ;src
+ jp storesmtn
+
+;----------------------------------------------------------------------------
+;---------------------- game loop -------------------------------------------
+;----------------------------------------------------------------------------
+
+game_main_loop: ;REPEATS FROM HERE EVERY FRAME
+ ld hl,timer ;update time
+ inc (hl) ;increase by 1
-exit_game:
- ret
+Clear_screen:
+ ld hl,dispbuffer ;move from (hl) = top left
+ ld (hl),0 ;first pixel will be copied all over the screen
+ ld de,dispbuffer+1 ;(de) = next pixel, thus clearing whole screen
+ ld bc,16*56-1 ;loop 896 times = (128/8) * (64-8 for scorebar)
+ ldir ;all clear!
+
+ ld a,0 ;current frame/turn 0-255
+timer =$-1
+ and %11 ;a=0 once every 4 turns
+ jr z,movestarsdone ;don't move stars once every 4 frames
+ cal movestars1 ;move the stars on the FRONT layer
+ cal movestars2 ;move the distant stars
+movestarsdone:
+ ld a,(stars1) ;star positions (the missing byte...)
+ ld b,nrstars1 ;how many stars? now we know.
+ ld hl,starx1 ;points to the position of the stars
+ cal DisplayStars ;display front layer stars
+ ld a,(stars2) ;weren't you paying attention five lines ago?
+ ld b,nrstars2 ;that many?! whow!
+ ld hl,starx2 ;and there they are
+ cal DisplayStars ;use the same procedure to display back layer
+
+ ld a,(level_info) ;level info
+ rra ;ground present? (%1)
+ jr nc,game_stuff ;no, so both non-present
+ rra ;bit representing the presence of any ceiling
+ cal nz,Handle_ceiling ;scroll the ceiling (if any) +check4collision
+ cal Handle_ground ;scroll the ground and check if we're dead
-;----------------------- game setup -------------------------------------------
+game_stuff:
+ cal Handle_Ship ;move you
+ ld a,(your_occ) ;are you 100% OK?
+ or a ;a=0??
+ jr nz,_gamestuff1 ;then don't check for movements/fires/...
-play_game:
+check_keys:
+ ld a,%10111111 ;function keys (MORE,EXIT,2ND,F1,F2,F3,F4,F5)
+ out (1),a ;ask for them
+ nop \ nop ;delay 8 clocks
+ in a,(1) ;gettem!
-;---------------------- display setup ----------------------------------------
+check_exitkey:
+ bit 6,a ;test bit 6 = exit-key = EXIT
+ jp z,game_over ;<exit> pressed, so be it
+check_morekey: ;another unused label... poor compiler
+ bit 7,a ;test bit 7 = more-key = PAUSE
+ psh af
+ cal z,Pause ;yes, go to pause
+ pop af
+
+check_firekey:
+ bit 5,a ;test bit 5 = 2nd-key = FIRE
+ ld hl,check_selkey ;where to continue after executing Fire_bullet
+ psh hl ;push hl on stack (instead of cal Fire_bullet)
+ jp z,Fire_bullet ;fire smtn (bulletstaillasermultiples+stuff..)
+ pop hl ;no cal to Fire_bullet made, so pop stack
+ ld hl,just_fired ;no:
+ ld (hl),5 ;able to fire (five turns = laser duration)
+laserdur =$-1 ;SMC laser duration
+
+check_selkey:
+ ld a,%01011111 ;look at first column of keys (ALPHA to STO)
+ out (1),a
+ in a,(1) ;our precious keys
-set_up_display:
- call _clrLCD
- ld (_curCol),16
- ld (_curRow),6
- ld hl,txt_score
- call _puts
+#ifdef teacherkey ;should we check for the teacherkey?
+ bit 6,a ;'bout the GRAPH key...
+ cal z,Teacher ;you didn't _press_ it, did you?!?
+#endif
-;------------------------------------------------------------------------------
-;-------------------------- game loop -----------------------------------------
-;------------------------------------------------------------------------------
+ rla ;test bit7 so we know f ALPHA has been pressed
+ cal nc,select ;yeppy, select the currently selected upgrade
-game_main_loop:
- ld hl,timer ;update time
- inc (hl)
+ cal Enemies_hit ;check for collision with enemies
+ cal inc_weapdamage
-Clear_screen:
- xor a
- ld hl,GRAPH_MEM+(16*12)
- ld b,a
-clearloop:
- ld (hl),a
- inc hl
- ld (hl),a
- inc hl
- ld (hl),a
- inc hl
- djnz clearloop
+_gamestuff1:
+ cal Handle_enemies ;move enemies
-check_exitkey:
- ld a,%00111111 ;<exit> pressed?
- out (1),a
- nop
- nop
- in a,(1)
- bit 6,a
- jr z,quit ;yes: quit game
+ cal Handle_bullets ;move your bullets + check for hits
+ cal Enemy_bullets ;move enemy bullets
-game_stuff:
- call Level_event ;insert enemies
- call Handle_Ship ;move you
- call Fire_bullet ;check for fire
- call Handle_bullets ;move bullets
- call Handle_enemies ;move enemies
- call Enemy_fires ;check for enemy fire
- call Enemy_bullets ;move bullets
- call Enemies_hit ;check for collision with enemies
+ cal Level_event ;insert enemies
+ cal Display_Screen ;display all
- call Display_Screen ;display all
- halt \ halt \ halt ;delay
- jr game_main_loop ;loop
+delay:
+ halt ;delay and preserve batteries :)
+ jp game_main_loop ;LOOP ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-quit: ret
+;------- weapon -------
-;---------------------- display -----------------------------------------------
+inc_weapdamage:
+ ld a,0
+weapincs =$-1
+ inc a
+ cp 97 ;max. 96 times (=96/16=6 increases)
+ ret nc ;return if already maxed
+ ld (weapincs),a ;save new incs
-Display_Screen:
- ld a,64 ;Display Image
- ld hl,GRAPH_MEM+(16*12)
- ld de,$fc00
-displayloop:
- ld bc,12
- ldir
- inc de
- inc de
- inc de
- inc de
+ and %11110000 ;clear last 4 bits so no cf when rotating
+ ;btw: AND resets cf
+ rra ;rotate acting as shift (srl a) but just 1B
+ rra
+ rra
+ rra ;increase once just every 16 turns
+ ld b,a ;times to increase
+incthedamage:
+ add a,1 ;increase damage for one increase
+weapdaminc =$-1
+ dnz incthedamage ;a=total increase damage
+ ld b,1 ;minimal damage
+weapdamage =$-1
+ add a,b ;a=total damage
+ ld (curweapdamage),a ;safe the current damage
+
+
+disp_charge: ;display charge bar
+ ld hl,(58*16)+VIDEO_MEM+3
+ ld b,3
+chargebarclr:
+ dec hl
+ ld (hl),0
+ dnz chargebarclr
+
+ ld a,(weapincs) ;load bar size (0-80)
+ srl a ;half the size (0-40)
+ srl a ;again half that size (0-20 pixels)
+ ld c,a ;psh a
+ srl a ;/2
+ srl a ;/4
+ srl a ;/8: don't display last 3 bits of a (later)
+ jr z,nochargebar ;if a=0 then it would loop 256x so skip it
+ ld b,a ;loop b=a times
+chargebar: ;starting at ($39*16)+VIDEO_MEM
+ ld (hl),%11111111 ;draw a piece of the bar
+ inc hl ;next position
+ dnz chargebar ;loop it b times
+nochargebar:
+ ld a,c ;pop a
+ and %111 ;display last bits of chargebar
+ ret z ;if armor=0 then bit = %00000000 (don't disp)
+ ld b,a ;into B
+ xor a ;bit = %00000000
+chargebarbit:
+ scf ;set carry flag
+ rra ;rotates A right and sets bit 7 (c-flag)
+ dnz chargebarbit ;repeat B times (so if B=6 then a=%11111100)
+chargebarready: ; (an if B=3 then a=%11100000)
+ ld (hl),a ;draw this last byte
+ ret
+
+;--------------------------- ground -----------------------------------------
+
+Handle_ground:
+ ld a,(timer)
+ and %111 ;once every 8 frames
+ jr nz,Display_ground ;otherwise skip the scroll
+ ld bc,15 ;scroll all 16 bytes minus one (teh new byte)
+ ld hl,groundpos+1 ;from..
+ ld de,groundpos ;to (one byte to the left)
+ ldir ;LoaDIncreaseRepeat = scroll!
+
+ ld a,(groundpos+14) ;last ground on right
+ ld d,a ;as default ground
+ ld hl,spacespace
+ ld bc,$500 ;range=0..4
+ cal Random ;a=0..4
+ dec a ;a=-1..3
+ dec a ;a=-2..2
+ ld b,a
+ add a,(hl) ;substract to spacesize
+ cp 57
+ jr nc,newground ;if nothing left then don't change
+ ld c,a
+ add a,b ;add offset (2 higher/lower) => new position
+ or a ;=0?
+ jr z,newground ;may not be 0 (=256)
+ cp -10 ;>246?
+ jr nc,newground ;and not be <0
+ ld d,a
+ ld (hl),c
+newground:
+ ld a,d
+ ld (groundpos+15),a ;save new byte on the right
+
+Display_ground:
+ ld b,16 ;screen width
+ ld de,groundpos-1 ;height of current byte (previous actually)
+ psh de ;use later
+ ld hl,dispbuffer+(56*16)-1 ;screen position
+ psh hl
+
+groundloopright:
+ ld c,b ;push b for groundloopup
+ pop hl \ inc hl ;get screen position and go one right
+ pop de \ inc de ;get height info and set to the next byte
+ psh de \ psh hl ;save these for the next time
+ ld a,(de) ;height of current byte
+ ld b,a ;save in b
+
+ ld de,-16 ;to substract to go one line up
+ ld a,%11111111 ;bitmask black
+groundloopup:
+ ld (hl),a ;display black byte
+ add hl,de ;go up (sbc must be used for 16-bit sub)
+ dnz groundloopup ;and loop >groundpos< times
+
+ ld b,c ;pop b used by groundloopup
+ dnz groundloopright ;loop right for entire screen (16x)
+ pop hl \ pop hl ;restore stack
+
+CheckGround: ;check for collision with the ground
+ ld a,(x)
+ srl a
+ srl a
+ srl a
+ inc a
+ ld l,a
+ ld h,0
+ ld de,groundpos
+ add hl,de
+ ld a,(y)
+ sub 57-7
+ neg
+ cp (hl)
+ ret nc
+ ld b,auch_ground
+ jp damage_you
+
+;--------------------------- ceiling ----------------------------------------
+
+Handle_ceiling:
+ ld a,(timer)
+ and %111 ;once every 8 frames
+ jr nz,Display_ceiling ;otherwise skip the scroll
+ ld bc,15 ;scroll all 15 bytes (16th is new position)
+ ld hl,ceilingpos+1 ;from..
+ ld de,ceilingpos ;to (one byte to the left)
+ ldir ;LoaDIncreaseRepeat = scroll!
+
+ ld a,(ceilingpos+14)
+ ld d,a ;d=new ceiling
+ ld hl,spacespace
+
+ ld bc,$201 ;range=1..3
+ cal Random ;a=1-3
+ dec a
+ jr z,newceiling ;1:same
dec a
- jr nz,displayloop
+ jr z,ctunnelup ;2:up
+ctunneldown: ;3:down
+ ld a,(hl)
+ or a ;(spacespace)=0:
+ jr z,newceiling+2 ;keep same ceiling
+ inc (hl)
+ inc d
+ jr newceiling
+ctunnelup:
+ ld a,1
+ cp d ;if size=1 then don't
+ jr z,newceiling
+ dec d
+ dec (hl)
+newceiling:
+ ld a,d
+ ld (ceilingpos+15),a ;save the new byte
+
+Display_ceiling:
+ ld b,16 ;screen width
+ ld de,ceilingpos-1 ;height of current byte
+ psh de ;use later
+ ld hl,dispbuffer-17 ;screen position
+ psh hl
+
+ceilingloopright:
+ ld c,b ;push b for ceilingloopdown
+ pop hl \ inc hl ;get screen position and go one right
+ pop de \ inc de ;get height info and set to the next byte
+ psh de \ psh hl ;save these for the next time
+ ld a,(de) ;height of current byte
+ ld b,a ;save in b
+
+ ld de,16 ;to substract to go one line up
+ ld a,%11111111 ;bitmask black
+ or a
+ceilingloopdown:
+ ld (hl),a ;display black byte
+ add hl,de ;go down
+ dnz ceilingloopdown ;and loop >ceilingpos< times
+
+ ld b,c ;pop b used by ceilingloopdown
+ dnz ceilingloopright ;loop right for entire screen (16x)
+ pop hl \ pop hl ;restore stack
+
+CheckCeiling: ;check for collision with the ceiling
+ ld a,(x) ;your x
+ srl a ;x/2
+ srl a ;x/4
+ srl a ;x/8 (current ceiling-byte)
+ inc a ;correction
+
+ ld l,a ;hl = a
+ ld h,0 ;"
+ ld de,ceilingpos ;first ceiling-byte
+ add hl,de ;current ceiling-byte
+ ld a,(y) ;your y-pos
+ inc a
+ cp (hl) ;compare with ceiling
+ ret nc ;carry if ceiling is above you
+ ld b,auch_ground
+ jp damage_you ;otherwise you don't wanna be in that ship
+
+;--------------------------- move stars -------------------------------------
- ld hl,$1006 ;Display Score
+DisplayStars: ;inputs: hl=starx# a=stars# b=nrstars#
+ ld e,(hl)
+ inc hl
+ ld d,(hl)
+ ld (de),a
+ inc hl
+ dnz DisplayStars
+ ret ;let's comment this: returns
+
+movestars2:
+ ld ix,starx2
+ ld a,(stars2)
+ rlca ;move bits (star) left
+ ld (stars2),a
+ ret nc ;if star didn't went from left to right bit
+ ld b,nrstars2 ;otherwise move all stars one byte left
+ jr movestars_loop
+
+movestars1:
+ ld ix,starx1
+ ld a,(timer)
+ rra
+ ld a,(stars1)
+ ret c
+ rlca
+ ld (stars1),a
+ ret nc
+ ld b,nrstars1
+
+movestars_loop:
+ ld h,(ix+1)
+ ld l,(ix)
+ dec hl
+
+ ld a,l
+ and %00001111
+ cp (dispbuffer&15)-1 ;$C9FAand15-- = 9
+ jr nz,newstarok
+ cal RandomY
+
+newstarok:
+ ld (ix),l
+ ld (ix+1),h
+ inc ix \ inc ix
+ dnz movestars_loop
+ ret ;for stupid people, here's another comment...
+
+;--------------------------- pause ------------------------------------------
+
+Pause:
+ ld hl,_txt_pause
+ ld (_penCol),hl
+ ld hl,txt_pause
+ cal _vputs ;display small font
+ ld hl,_txt_pressenter ;top centered
ld (_curRow),hl
- ld hl,(timer)
-; jp _D_HL_DECI
- ret
+ ld hl,txt_pressenter ;"Enter to continue"
+ cal _puts ;display message
+pause:
+ cal getsomekeys ;GET_KEY w/ halts and checks for enter
+ ret z ;enter/second pressed: continue game
+ cp K_F1 ;F1 pressed?
+ jr nz,notinvert
+ cal do_invert ;if so then change invert screen (AF saved)
+ cal mode_invert ;and screen mode (will be saved)
+notinvert:
+ ld hl,CONTRAST ;contrast setting (0-31)
+ ld b,(hl) ;load contrast into b
+ cp K_UP ;+ key changes contrast up
+ jr nz,contr_not_up
+ inc b ;increase contrast
+ jr setcontrast ;set
+contr_not_up:
+ cp K_DOWN ;- key
+ jr nz,pause ;nope: loop
+ dec b ;decrease contrast
+setcontrast:
+ ld a,b
+ ld (hl),a
+ out (2),a ;and set it
+ cal releasekeys
+ jr pause ;and loop
+
+;--------------------------- teacher ----------------------------------------
+
+#ifdef teacherkey ;can be disabled to save space if not needed
+ ;DO NOT RELEASE NEMESIS COMPILED W/O TEACHERKEY!!!!!
+Teacher:
+ ld (iy+12),5 ;enable flashing cursor
+ cal _clrWindow ;top left
+ ld hl,txt_teacher
+ cal _puts ;display message
+ cal releasekeys
+
+teacherloop:
+ cal _getkey ;enter low-power mode and wait for key
+ cp kEnter ;enter pressed?
+ jr z,teacherans
+ cp kGrMenu ;keypressed = graph?
+ jr nz,teacherloop ;no, wait some more
+
+ ld (iy+12),0 ;disable cursor
+ cal releasekeys
+ jp disp_icons ;+ret
+
+teacherans: ;enter displays the answer
+ ld a,' ' ;the cursor could still be displayed (█)
+ cal _putc ;so remove it by displaying a ' ' over it
+
+ ld hl,$0701
+ ld (_curRow),hl ;below the equation, aligned right
+ ld hl,txt_teacherans ;the answer text
+ cal _puts ;display
+ jr teacherloop ;and continue loop
+#endif
+
+;--------------------------- exit -------------------------------------------
+
+quit: im 1 ;release keyfix procedure
+ set 2,(iy+13) ;set back screen scrolling
+ xor a
+ ld (_asapvar+1),a ;next Asm( run will reload the program
+ ld hl,dispbuffer ;graph-screen location
+ ld de,dispbuffer+1
+ ld (hl),a
+ ld bc,1024-1 ;do it 1024 times = entire screen
+ ldir
+ jp _clrWindow ;as _clrLCD but also clears TEXT_MEM (like the
+ ;_clrScrn) AND also executes _homeup and ret
-;------------------------- handle ship ----------------------------------------
+;--------------------------- display ----------------------------------------
+
+Display_Screen:
+ ld hl,dispbuffer ;from buffer (top left)
+ ld de,VIDEO_MEM ;to real screen (top left)
+ ld c,56 ;display height = 64 bytes (minus 8 for bar)
+displayloop:
+ ld b,16 ;display width = 16 bytes (16*8bits=256pixels)
+displaytloop:
+ ld a,(hl) ;copy byte from (hl)
+_invert: ;SMC: cpl <-> or a
+ cpl ;xor $ff: invert byte (white<=>black)
+ ld (de),a ;to (de)
+ inc hl \ inc de ;next byte
+ dnz displaytloop ;16x hl >> de
+ dec c ;next line
+ jr nz,displayloop ;loop 56x
+
+ ld hl,time2invert
+ ld a,(hl)
+ or a ;(time2invert)=0:
+ jr z,noinvert ; do nothing
+ dec a ;otherwise decrease
+ cal z,do_invert ;if it became 0 then invert
+ ld (hl),a ;save new value
+noinvert:
+
+ ld hl,$396b ;Display Score
+ ld (_penCol),hl ;bottom right of screen
+ ld hl,(your_score)
+
+_D_HL_DECI: ;------- display 5-digit value -------
+ ld de,savestr+4 ;savenr saves number string
+ ld b,5 ;five digits
+ldhld: cal UNPACK_HL ;one digit of hl
+ add a,'0' ;make number
+ ld (de),a ;save into savenr
+ dec de ;point to next digit
+ dnz ldhld ;repeat for all digits
+
+ ld hl,savestr ;we (the program) saved the value righthere
+ jp _vputs ;the only thing left to do is to display it
+
+savestr: ;@here the score will be stored
+ .db "00000",0 ;don't worry, it's just temporary
+
+;------------------------- handle ship --------------------------------------
Handle_Ship:
- ld a,(your_occ)
- or a
- jr z,ok ;0 = normal stat
-
-; dec a
-; ld (your_status),a
-; ld hl,(lives)
-; ld a,l
-; or h
-; jr nz,ok
-; pop af
-; ret
-
-ok:
- ld a,%01111110
- out (1),a
- ld hl,y
- in a,(1)
- rra
- ld b,a
+ ld a,(your_occ) ;are
+ or a ;you
+ jr z,ok ;ok?
+
+ inc a ;no! next (explosion)frame
+ ld (your_occ),a ;save
+
+ cp 64+1 ;last explosion frame? (1-16=1st;49-64=4th)
+ jp c,exploding_you ;not yet: display explosion
+ cp 64+16 ;delay finished?
+ jp z,You_die ;yes = game over
+ ret ;don't display anything
+
+;----move----
+ok: ;we are
+ ld a,%01111110 ;get arrow keys
+ out (1),a ;it's cold outside
+ ld hl,y ;instead of nop\nop do something usefull
+ in a,(1) ;come back in
+
+ ld b,a ;psh a (keys)
+ xor -1 ;inverted a: 0 if arrow-key has been pressed
+ ld a,(your_multiples) ;(btw: CPL doesn't set any flags)
+ res 7,a ;reset move bit (no flags changed)
+ jr z,adv_ok ;if so, leave the multiples where they are
+ set 7,a ;set move bit
+adv_ok: ld (your_multiples),a
+
+ ld a,(timer) ;framecounter
+ and %1 ;switches 0<>1 each frame
+ inc a ;a = 1 or 2 (1.5 avg)
+ ld c,a ;c = your_speed
+
+ ld a,b ;pop a (keys)
+ rra ;rotate right (put last bit in c)
+ ld b,a ;we need a later
jr c,no_down
ld a,(hl)
- inc a
- cp 73 ;y < 73
- jr z,no_down
+ add a,c
+ cp 50 ;56-6 = bottom of screen
+ jr nc,no_down
ld (hl),a
no_down:
dec hl
- rr b
+ rr b ;because we now use b, it's rr instead of rra
jr c,no_left
ld a,(hl)
- dec a
- jr z,no_left ;x > 0
+ sub c ;<dec a> doesn't affect c-flag
+ jr c,no_left ;-1 = left side
ld (hl),a
no_left:
- rr b
+ rr b
jr c,no_right
ld a,(hl)
- inc a
- cp 89 ;x < 89
- jr z,no_right
+ add a,c
+ cp 122 ;128-6 = right side
+ jr nc,no_right
ld (hl),a
no_right:
- ld d,(hl)
+ ld d,(hl) ;d=x
inc hl
rr b
jr c,no_up
ld a,(hl)
+ sub c ;<dec a> doesn't affect carry-flag
+ jr c,no_up ;-1 = top of screen
+ ld (hl),a ;save new y
+
+no_up: ld e,(hl) ;e=y
+ ld ix,spr_ship01 ;normal ship sprite
+your_shipspr =$-2
+ ld hl,your_shield ;shielded?
+ ld a,(hl) ;load time in a
+ or a ;is it 0?
+ jr z,disp_ship ;yes so ship = normal (display \ continue)
+
+ ld a,(timer) ;load frame nr.
+ and %00000111 ;a=0 once every four frames
+ jr nz,not_time ;a<>0 = not time to update counter
+ dec (hl) ;decrease inv-time left
+not_time:
+ and %00000100 ;a switches 0<->1 every 2 frames
+ jr z,disp_ship ;show normal ship
+inv_flicker:
+ ld bc,spr_ship01i-spr_ship01
+ add ix,bc ;display invulnerable ship
+disp_ship:
+ cal safeputsprite ;display your ship; save de
+
+;----multiples----
+
+handle_multiples:
+ ld a,(your_multiples) ;do you have multiples
+ ld b,a ;save a for 2nd check
+ and %1111 ;no? (last four bits = nr of multiples)
+ ret z ;then don't handle them either
+ bit 7,b ;move the multiples??? (=move bit set?)
+ jr z,mult_adv ;nope, just let them (saves (y)in y, (x)in x)
+
+ psh de ;current position = needed later
+ ld hl,mm*14+1+your_prevpos ;previous positions
+ ld de,mm*14+3+your_prevpos ;move all positions one back
+ ld bc,mm*14+2
+ lddr ;change 0-57 -> 2-59 (if mm=4 that is)
+ inc hl ;your_prevpos+0
+ pop de
+ ld (hl),d ;x-pos
+ inc hl ;=current position
+ ld (hl),e ;y-pos
+
+mult_adv:
+ ld ix,spr_multiple ;normal sprite
+ ld hl,timer
+ bit 3,(hl) ;change sprites every 8 turns
+ jr z,disp_multiples
+ ld ix,spr_multiple2 ;second sprite
+disp_multiples:
+ ld hl,your_prevpos+16 ;first pos.
+dispmultiplesloop:
+ psh af
+ psh hl
+ ld d,(hl) ;load coords
+ inc hl
+ ld e,(hl)
+ psh ix
+ cal putsprite ;display
+ pop ix ;same sprite next time ;)
+ pop hl
+ ld de,14
+ add hl,de ;next multiple
+ pop af ;counter
dec a
- cp 15 ;y > 15
- jr z,no_up
- ld (hl),a
-no_up: ld ix,spr_ship01
+ ret z ;return if all done
+ jr dispmultiplesloop ;loop
-display_common:
- ld e,(hl)
- jp drw_spr
-
-;you_not_normal:
-; ld a,(your_status)
-; dec a
-; ld (your_status),a
-; inc a
-; and 14
-; xor 14
-; ld hl,x-1
-
-explosion_stuff:
- rra
- add a,a
- add a,a
+;----explode----
+
+exploding_you:
+ srl a ;half the framerate
+ srl a ;half that framerate
+ srl a ;and half again that framerate
+ ld hl,x-1
+ ld ix,spr_yexplosion ;base sprite
+
+explosion_stuff: ;in:a=frame*2+(0 to 1); (hl)=xpos-- ix=sprite
+ and %11111110
add a,a
+ add a,a ;frame*8
ld c,a
- ld b,0
- ld ix,spr_explosion
- add ix,bc
- inc hl
- ld d,(hl)
- inc hl
- jr display_common
-
-damage_you:
+ ld b,0 ;bc=a
+ add ix,bc ;go to correct sprite (each spr. is 8 bytes)
+ inc hl ;@x
+ ld d,(hl) ;load xpos
+ inc hl ;@y
+ ld e,(hl) ;and y
+ jp putsprite ;and display it too
+
+;----hit----
+
+damage_you: ;damages you B points
+ ld a,(your_occ) ;return if already dead (prevents exploding
+ or a ; twice, or stucking in exploding state)
+ ret nz ;0 = you're normal
+
+ ld a,(hardcore) ;hardcore mode?
+ or a
+ jr z,damageok ;0 = no = don't modify
+; sla b ;1 = yes = double tha damage (b shifted left)
+ .db $CB,$30 ;sll b ;damage=2b|1 (CB3r = unsupported SLL r)
+damageok:
+ ld a,(your_shield) ;shield left?
+ or a
+ jr z,dothadamage ;no shield
+ srl b ;shield: half the damage
+dothadamage:
+ ld hl,time2invert
+ xor a ;a=0
+ cp (hl) ;not already inverted?
+ cal z,do_invert ;then invert screen
+ ld (hl),2 ;change back 2 frames from now
+
+ ld hl,your_armor ;armor left
+ ld a,(hl) ;load hp in A
+ sub b ;decrease hp by B
+ jr nc,newarmor ;>=0hp left so don't explode
+ ld a,%01 ;occ %xxxxxx01 = explode
+ ld (your_occ),a ;too bad, you're dead meat
+newarmor:
+ ld (hl),a ;save decreased hp
+ jp disp_armor ;and display new value
+
+;------------------------- place multiples ----------------------------------
+
+Place_multiples:
+ ld hl,your_prevpos ;place all previous positions
+ ld b,mm*7+2 ;all saved positions of them (14 per multiple)
+place_multiples:
+ ld (hl),e ;set prev-x to d
+ inc hl ;next
+ ld (hl),d ;set prev-y to e
+ inc hl ;next
+ dnz place_multiples ;repeat
ret
-;------------------------- fire bullet ----------------------------------------
+;------------------------- select upgrade -----------------------------------
-Fire_bullet:
- ld a,%00111111
- out (1),a
- ld a,(your_occ)
+inc_armor:
+ ld a,(your_armor) ;load current armor
+ cp maxarmor-5 ;may not become >=maxarmor
+ jr c,doincarmor ;ok then just add 6
+ ld a,maxarmor-6 ;set to maximum (6 will be added below)
+doincarmor:
+ add a,6 ;add 6 to armor
+ ld (your_armor),a ;change armor
+ ret
+
+select:
+ ld de,your_weapon ;current weapon, required for most selections
+ ld hl,your_pickup ;select pickups
+ ld a,(hl) ;load pickups taken so far
+ dec a ;is it 1?
+ ret m ;return if it's 0 (no pickups)
+
+ jr nz,selectlaser ;no, carry on
+ ld (hl),a ;reset pickups
+ ld a,(de) ;(your_weapon)
+ inc a ;next
+ cp maxweapon
+ jr c,selectedbeam ;weapon OK
+ jr z,disp_icons ;weapon maxed out
+ xor a ;laser was selected: set to first weapon
+selectedbeam:
+ ld (de),a ;set new weapon
+ cal loadweapon ;load it (damage and stuff)
+ xor a
+ ld (your_multiples),a ;no multiples with beam
+ jr disp_icons ;display n return
+selectlaser:
+ dec a ;is it 2?
+ ld (hl),0 ;reset pickups
+ jr nz,selectextra ;no, carry on again
+ ld (your_extra),a ;no extra beams (tailbeam/up-double)
+ ld a,(de) ;(your_weapon)
+ cp maxweapon ;upgrade from bullet?
+ jr nc,upgradelaser ;nope, just upgrade
+ ld a,maxweapon-1 ;yes, set laser #1
+upgradelaser:
+ inc a ;next laser
+ cp maxlaser
+ jr nc,disp_icons ;laser maxed out
+ ld (de),a
+ cal loadweapon
+ jr disp_icons ;display + return
+selectextra:
+ ld a,(de) ;(your_weapon)
+ cp maxweapon+1 ;laser or beams?
+ jr c,selectXbeam ;if beamweap then no multiples but extra beam
+ ld hl,your_multiples
+ ld a,(hl) ;multiples you already got
+ and %1111 ;reset movebit so (your_multiples)=real value
+ inc a ;one more
+ cp mm+1
+ jr nc,enoughmultiples ;maxed out
+ ld (hl),a
+enoughmultiples:
+ ld de,(x)
+ dec a ;if this is your first multiple then...
+ cal z,Place_multiples ;reset multiples positions
+ jr disp_icons ;display, return
+selectXbeam:
+ ld a,(your_extramode) ;indicates whether this is tailbeam/double
+ ld (your_extra),a ;ready extra beam
+; jr disp_icons ;display 'n return
+
+;--------------------------- show icon --------------------------------------
+
+disp_icons: ;destroyes: abcdehlix
+ ld a,VIDEO_MEM/$400 ;directly on screen
+ ld (PutWhere),a ;place icons at normal screen
+ ld hl,VIDEO_MEM+(16*56);56 rows down = eight rows from bottom
+ ld b,16 ;draw 16x (screen width)
+ ld a,%11111111 ;horizontal line mask
+ cal drawline ;draw divider-line
+
+ ld b,16*7 ;draw 16x (screen width) 7x (height)
+ xor a ;blank line mask
+ cal drawline ;clear scorebar
+
+disp_lives:
+ ld de,$003C ;(0,4)
+ ld a,(your_lives) ;nr of lives
or a
- ret nz ;return if not normal stat
- ld hl,just_fired
- in a,(1)
- bit 4,a
- jr z,fire ;fire pressed?
- ld (hl),0 ;not fired
+ jr z,displivesdone ;no lives
+ ld b,a
+displivesloop:
+ psh bc
+ ld ix,spr_lship
+ cal safeputsprite ;put li'l ship
+ ld a,lshipsize+1
+ add a,d
+ ld d,a ;x=x+5
+ pop bc
+ dnz displivesloop ;one ship per life
+displivesdone:
+ cal disp_armor ;display bar
+
+ ld ix,spr_icon00
+ ld a,(your_weapon) ;ur weapon
+ cp maxweapon ;laser?
+ psh af ;a=(your_weapon); cf=bullets
+ jr nc,no_bullets ;=laser
+ ld hl,$3945 ;position to display bullet-type digit
+ pop af ;digit=(your_weapon)
+ psh af
+ inc a ;1 = weapon #1 (=0)
+ ld (_penCol),hl ;set location
+ add a,'0' ;make digit
+ cal _vputmap ;display char
+ ld ix,spr_icon03 ;bulletIcon
+no_bullets:
+ ld de,$3939 ;icon #1
+ cal putwidesprite ;display icon (beamweap)
+
+ ld ix,spr_icon00 ;emptyIcon
+ pop af ;ld a,(your_weapon)
+ ld b,a
+ jr c,no_laser ;popped carry
+ ld hl,$3955 ;position to display bullet-type digit
+ ld (_penCol),hl ;set location
+ ld a,b ;(your_weapon) ;load = faster than push
+ sub maxweapon-1 ;1 = laser #1 (=maxweapon)
+ add a,'0' ;make digit
+ cal _vputmap ;display char
+ ld ix,spr_icon04 ;laserIcon
+no_laser:
+ ld de,$4939 ;icon #2
+ cal putwidesprite ;(laser)
+
+ ld ix,spr_icon00 ;emptyIcon
+ ld a,(your_multiples) ;number of multiples
+ and %111 ;<8
+ jr z,no_multiples ;none, check for beam extras
+ ld ix,spr_icon05 ;multiples-icon
+ jr no_tail ;display
+no_multiples: ;no multiples
+ ld a,(your_extra) ;extra weapon
+ or a ;0?
+ jr z,no_tail ;nothing
+ ld ix,spr_icon02a ;tailbeamIcon
+ dec a
+ jr z,no_tail ;(your_extra)=1 = tailbeam
+ ld ix,spr_icon02b ;updoubleIcon
+no_tail: ;display
+ ld de,$5939 ;icon #3
+ cal putwidesprite
+
+ ld ix,spr_dividerline
+ ld de,$6939
+ cal putwidesprite
+
+ ld a,(your_pickup) ;pickups taken
+ add a,a ;picks*2 (sets z-flag)
+ jr z,iconsdone ;return if no pickups
+ add a,a ;picks*4
+ add a,a ;picks*8
+ add a,a ;picks*$10
+ add a,$29 ;add 29h
+ ld d,a ;y-pos = picks * $10 + $29 (3a,4a,5a)
+ ld e,$39 ;x-pos = bottom (3a39,4a39,5a39)
+
+ ld ix,spr_icon
+ cal putwidesprite
+iconsdone:
+ ld a,dispbuffer/$400 ;normal game-screen
+ ld (PutWhere),a ;set sprite-position to normal screen
+ jp disp_charge ;display weapon charge bar
+
+
+disp_armor:
+ ld de,16 ;line size
+ ld hl,(58*16)+VIDEO_MEM+6
+ ld c,5 ;5 lines down
+armorbarclrY:
+ ld b,4 ;four bytes right
+ psh hl
+armorbarclrX:
+ ld (hl),0 ;clear
+ dec hl ;next byte
+ dnz armorbarclrX ;4x
+ pop hl ;old position
+ add hl,de ;one pixel down
+ dec c ;5x
+ jr nz,armorbarclrY ;loop
+
+ ld hl,VIDEO_MEM+(58*16)+6
+ ld a,(your_armor) ;load your armor (<maxarmor)
+ srl a ;divide by 2 (barsize halved)
+ psh af
+ and %111 ;display last bits of armor
+ jr z,armorbarbitok ;if b=0 then prevent looping 256x
+ ld b,a ;into B
+ xor a ;bit = %00000000
+armorbarbit:
+ scf ;set carry flag
+ rla ;rotates A left and sets bit 0 (c-flag)
+ dnz armorbarbit ;repeat B times (so if B=6 then a=%00111111)
+armorbarbitok: ; (an if B=3 then a=%00000111)
+ ld c,a ;save last bit in c
+ pop af ;now we'll make the byte
+ and %11111000 ;clear last three bits
+ rra ;so we can use rotate instead of shift right
+ rra ;which saves 3(-2) bytes and speed
+ rra ;/8: don't display last 3 bits of a (later)
+
+ ld b,5 ;bar height
+armorbarloop1:
+ psh bc ;yloop counter
+ psh hl ;begin x-position
+ ld b,a ;loop b=a times per line
+ or a ;<1 bytes
+ jr z,lastarmorbit ;then don't display bytes (would be 256x)
+armorbarbyte:
+ ld (hl),%11111111 ;draw a piece of the bar
+ dec hl ;next position
+ dnz armorbarbyte ;loop it b times
+lastarmorbit:
+ ld (hl),c ;draw the last byte
+ pop hl ;recall first byte
+ add hl,de ;one down
+ pop bc ;recall yloop-counter
+ dnz armorbarloop1 ;display again
ret
-fire: ld a,(hl)
- or a ;can't fire when 1
- ret nz
- ld (hl),1 ;just fired
- ld hl,ybullets
- ld de,3
- ld b,10
+drawline:
+ ld (hl),a ;draw one piece of the divider-line
+ inc hl ;move right (8 pixels = 1 byte)
+ dnz drawline ;repeat (16bytes * 8pixels =128= screen width)
+ ret
+
+;------------------------- fire bullet --------------------------------------
+
+fire_multiple:
+ psh af
+ psh ix ;save ix for next fire
+ cal fireany ;fire from multiple position
+ pop ix ;saving ix is much faster than recalculating
+ pop af ;number of multiples
+ dec a ;one just displayed
+ pop hl ;ret
+ ret z ;ret2 if none left
+ jp (hl) ;real ret
+
+fire_multiples:
+ ld hl,(your_prevpos+16);then, fire from multiple position
+ cal fire_multiple
+ ld hl,(your_prevpos+30)
+ cal fire_multiple
+ ld hl,(your_prevpos+44)
+ cal fire_multiple
+ ld hl,(your_prevpos+58)
+ cal fire_multiple ;no JP: that messes up the stack
+ ret
+
+Fire_bullet:
+ ld hl,just_fired ;=for how long you may hold fire (2nd)
+ ld a,(hl) ;a = time left
+ dec a ;decrease timer
+ ret z ;may not fire when (just_fired) became 0
+ ld (hl),a ;save new decreased value
+
+ ld a,(your_weapon) ;if you have bullets.....
+ cp maxweapon
+ jr nc,fireOK ;>weapons = laser
+ ld (hl),1 ;bullet may last one turn (just fire 1 bullet)
+fireOK:
+ ld a,(your_weapon) ;weapon nr.
+ ld ix,weapondata+2
+ add a,a ;weap*2
+ add a,a ; *4
+ add a,a ; *8
+ ld c,a
+ ld b,0 ;go to current weapon (bc=a)
+ add ix,bc ;ix=weapon ptr
+
+ ld a,(your_multiples) ;any multiples?
+ and %1111 ;nr. of multiples
+ cal nz,fire_multiples ;if >0 then fire them too
+ ld hl,(x) ;fire from ship position (x)
+fireany: ;HL=(x,y)
+ ld (firex),hl ;set position to fire from
+ ld b,3 ;or use the proc at fireOK with ld ix,weapondata+2-(256*3)
+fire_weapon:
+ psh bc ;save counter
+ ld a,(ix) ;load this weapon
+ ld c,a ;save bulletType in c
+ and %11100000 ;%111?????=laser
+ cp %11100000 ;is it?
+ cal z,fire_laser ;fire laser (will set c=0 when done)
+ xor a ;<>0=bullet
+ cp c ;c<>0?
+ cal nz,fire_ybullet ;then fire bullet
+ inc ix ;otherwise fire next weapon
+ inc ix
+ pop bc ;weapon counter (do 3 weapons)
+ dnz fire_weapon
+
+fire_tail:
+ ld ix,extrabulletpos-1 ;extra bullet's position
+ ld hl,your_extra ;data
+ ld a,(hl)
+ or a
+ ret z
+ ld c,tailbeam ;tailbeam weapon data
+ dec a ;(your_extra)=1
+ jr z,fire_ybullet ;=tail
+ ld c,doublebeam ;up double data
+ ;(your_extra)=2 =double
+;-----fire BULLETs-----
+
+fire_ybullet: ;fire bullet type=C dam=(curweapdamage) at (firex/y)
+ ld hl,ybullets ;check for unused bullet
+ ld de,4
+ ld b,nrybuls
find_ybullet:
ld a,(hl)
or a
jr z,found_ybullet ;0 = no bullet here
add hl,de
- djnz find_ybullet ;look next bullet
- ret
+ dnz find_ybullet ;look next bullet
+ ret ;none found, return don't fire
found_ybullet:
- ld (hl),1 ;use bullet
- inc hl
- ld a,(x)
- add a,5
+ ld (hl),c ;use the bullet and set correct bullet-type
+ inc hl ;@damage
+ ld (hl),1 ;set bullet damage
+curweapdamage =$-1
+ ld a,(firex) ;your x-pos
+ add a,5 ;place bullet in front of you
+ inc hl ;go to bullet-x
ld (hl),a ;set x
- ld a,(y)
- add a,2
- inc hl
+
+ ld a,(firey) ;your y-pos
+ add a,(ix+1) ;place bullet at the middle of your ship
+ inc hl ;go to bullet-y
ld (hl),a ;set y
+
+ xor a
+ ld (weapincs),a ;reset damage
ret
-;------------------------ handle bullets --------------------------------------
+;-----fire LASER-----
-remove_bullet:
- dec hl
- ld (hl),0 ;dump this bullet!
+fire_laser:
+ ld b,0 ;overflow counter
+ ld hl,firex
+ ld d,(hl) ;d = your x-pos
+ inc hl
+
+ ld a,(hl) ;base y-coord (firey)
+ add a,(ix+1) ;at specified offset (most likely the middle)
+ ld e,a ;save laser-y in e
+ psh de ;save unmodified (x,y)
+ add a,a ;y*2
+ add a,a ;y*4
+ add a,a ;y*8
+ rl b ;b (=0) =b*2+overflow (if y>32 then bc=bc+256)
+ add a,a ;y*16 (width of screen)
+ rl b ;b=b*2+overflow (if y>64 then bc=bc+512)
+ inc a ;8 pixels to right (a=even so no overflow)
+
+ srl d ;X/2
+ srl d ;X/4
+ srl d ;X/8
+ add a,d ;a = (Y*16+X/8) mod 256 (c set on overflow)
+
+ jr nc,_nolc ;jump if no carry = no overflow = a<=255
+ inc b ;a>255 so increase bc by 256
+_nolc: ld c,a ;c = (Y*16+X/8) mod 256
+ ld hl,dispbuffer ;save-location
+ add hl,bc ;bc = Y*16+X/8: hl=screen address
+ ld a,15 ;128/8=16=screen width ** minus one (inc a ^^)
+ sub d ;minus x-start (d=X/8)
+ ld b,a
+drawlaser:
+ ld (hl),%11111111
+ inc hl ;Go to next byte
+ dnz drawlaser
+handle_laser:
+ pop de ;de=(firex): x-pos unmodified
+
+check_laserhits: ;de = (x,y)
+ psh ix
+ ld b,nrenemies ;check all enemies
+ ld hl,enemies+1 ;enemy#1+occ/hp00
+laserhits: ;hits with normal enemies
+ psh hl
+ ld a,(hl) ;occ+hp00
+ and %11 ;normal enemy occ = %11
+ cp %11
+ jr nz,nolashit ;no hit when enemy_occ <> 11
+
+ inc hl ;@type
+ cal find_sprite ;ix=sprite to enemy (hl)
+ inc hl ;@x
+ ld a,(hl) ;check x
+ sub d
+ jr c,nolashit ;no hit when enemy is left of you
+ inc hl ;@y
+ ld a,(hl) ;check y
+ sub e
+ jr z,enemy_lashit ;a-e=0 = laser on top line of enemy = hit
+ jr nc,nolashit ;a-e>0 = enemy above laser = no hit
+ dec a ;minus one
+ add a,(ix+1) ;add enemy height (according to sprite @ix)
+ jp m,nolashit ;a-e>0 = hit
+enemy_lashit:
+ ld a,(curweapdamage) ;damage
+ cal enemy_hit ;hl=enemy+y
+nolashit:
+ pop hl ;enemy+1
+ ld a,b ;psh bc
+ ld bc,enemysize
+ add hl,bc ;go to next enemy
+ ld b,a ;pop bc
+ dnz laserhits ;check all enemies
+ xor a
+ ld (weapincs),a ;reset damage
+ pop ix
+ ld c,a ;c=0
ret
+;------------------------ handle bullets ------------------------------------
+
Handle_bullets:
ld hl,ybullets
- ld b,10
+ ld b,nrybuls
scan_bullets:
- push bc
- push hl
- ld (temp1),hl
+ ld a,(hl) ;@bulletType
+ or a ;bulletType=0 >> no bullet
+ jp z,next_ybullet+2 ;skip pops (+2); jP for speed
+
+ psh bc ;bullet counter
+ psh hl ;save enemy+type
+ ld (temp1),hl ;needed for check_bullethits
+ inc hl ;@damage
+ ld c,(hl) ;damage
+ dec c ;c=damage-1
+ jp m,bullethitbullet ;damage<=0 (=no bullet)
+ inc hl ;@x
+
+;move_bullet
+ ld c,a ;c=type
+ and %11111 ;pixels to move
+ add a,(hl) ;a = X + (hl) to the right
+ sub 16 ;and 16 to the left (so -16..+15)
+ jr c,remove_bullet ;remove if x<0
+ cp 128
+ jr nc,remove_bullet ;or x>=128
+ ld (hl),a ;save new pos.
+ ld d,a ;d = X
+
+ inc hl ;@y-pos
+ ld a,c
+ cal _shracc ;%11100000->1110
+;Note: a _shracc procedure inside Nemesis itself would be 27 cycles faster
+ srl a ;%1110->111
+ dec a
+ jr z,bullet_noymove ;1=straight forward
+ dec a
+ jr z,bullet_up ;2=up
+ dec a
+ jr z,bullet_halfup ;3=1/2up
+ dec a
+ jr z,bullet_down ;4=down
+bullet_halfdown: ;5=1/2down
+ ld a,(timer)
+ rra ;carry once every other turn
+ jr c,bullet_noymove
+bullet_down:
+ ld a,(hl)
+ inc a
+ cp 55
+ jr z,bullet_noymove
+ ld (hl),a
+bullet_halfup:
+ ld a,(timer)
+ rra ;CF every other turn
+ jr c,bullet_noymove
+bullet_up:
ld a,(hl)
- inc hl
dec a
- call z,bullet_type1
- pop hl
- pop bc
- ld de,3
+ jr z,bullet_noymove
+ ld (hl),a
+bullet_noymove:
+ ld e,(hl) ;e = Y
+
+display_bullet:
+ dec hl ;@x
+ dec hl ;@damage
+ ld a,(hl) ;bullet damage=size
+ ld hl,bullettable ;pointer to first bullet
+ srl a
+ srl a ;per 4
+ ld b,0
+ ld c,a ;->16bit (de=a)
+ add hl,bc ;point to correct bullet offset
+ ld a,(hl) ;load bullet offset
+ ld c,a ;convert to 16bit (d=0)
+ ld ix,spr_bullet01 ;first sprite
+ add ix,bc ;add offset (go to correct sprite)
+
+ ld a,(ix) ;bullet x-size
+ ld (bulletxsize),a ;used at check_bullethits
+ ld a,(ix+1) ;bullet y-size...
+ ld (bulletysize),a ;...too
+
+ cal safeputsprite ;display bullet; DE used for check_bullethits
+
+ cal check_bullethits
+
+next_ybullet:
+ pop hl ;restore enemy+type
+ pop bc ;b=counter
+ ld de,4
add hl,de
- djnz scan_bullets
+ dnz scan_bullets ;next bullet (loop)
ret
-bullet_type1:
- ld a,(hl) ;d = X
- inc a ;move right
- cp $5a ;off screen?
- jr z,remove_bullet
- inc a ;move right
- cp $5a ;off screen?
- jr z,remove_bullet
- ld (hl),a ;save new pos.
- ld d,a
- inc hl
- ld e,(hl) ;e = Y
- ld ix,spr_bullet01
- push de
- call drw_spr ;display bullet
- pop de
- ld b,20
- ld hl,enemies
+remove_bullet:
+ pop hl ;enemy+type
+ ld (hl),0 ;dump this bullet!
+ jr next_ybullet+1 ;+1:skip pop hl at next_ybullet
+
+bullethitbullet: ;"bullet" just displaying a bullet hit
+ inc c ;restore damage (to -5..0)
+ jp z,remove_bullet ;if it's 0 remove it
+ inc c ;increase to next frame
+ ld (hl),c ;save new
+ ld a,c
+ neg ;make positive value (frame nr. 0..4)
+ add a,a ;*2
+ ld e,a
+ add a,a ;*4
+ add a,e ;*6
+ ld e,a
+ ld d,0 ;de=a
+ ld ix,spr_hit ;first hit sprite
+ add ix,de ;add frame nr*8 (goto correct sprite)
+ inc hl ;@x
+ ld d,(hl)
+ inc hl ;@y
+ ld e,(hl) ;load position into de
+ cal putsprite ;display hit-sprite
+ jr next_ybullet ;handle the other bullets
+
+;--------------------------- check bullethits -------------------------------
+
+check_bullethits: ;INPUT: de=X,Y; (temp1)=bullet
+ ld b,nrenemies
+ ld hl,enemies+1
hit_enemies: ;Hits with normal enemies
- push hl
+ psh bc ;enemy counter
+ psh hl
ld a,(hl)
- and %00000010
- jr z,nohit ;no hit when enemy_occ <> 2/3
+ and %11
+ cp %11
+ jr nz,nohit ;no hit when enemy_occ <> %11
- inc hl
- inc hl
- ld a,(hl) ;check x
- sub d
- add a,5
- jp m,nohit
- cp 8
- jr nc,nohit
+ inc hl ;enemy type
+ cal find_sprite ;set ix to the sprite of this enemy
- inc hl
+ inc hl ;@x
+ ld a,(hl) ;check x
+ sub d ;minus bullet x-position
+ ld b,a ;psh a
+ sub 5 ;minus bullet x-size
+bulletxsize =$-1
+ jp p,nohit ;miss
+ ld a,b ;pop a
+ add a,(ix) ;add enemy width
+ jp m,nohit ;miss
+
+ inc hl ;@y
ld a,(hl) ;check y
- sub e
- add a,5
- jp m,nohit
- cp 10
- jr nc,nohit
-
- xor a
- push hl
- ld hl,(temp1)
- ld (hl),a ;remove bullet
- pop hl
-
- dec hl
- dec hl
- dec hl
- ld a,(hl) ;occ
- ld b,a
- srl a
- srl a ;occ/4 = HP left
- jr nz,hpleft
- ld (hl),$01 ;set to explode
- inc hl
- ld (hl),a ;explosionFrame 0
- pop hl
- ret
-
-hpleft:
- ld a,b
- sub %00000100 ;decrease HP by one
- ld (hl),a ;save
+ sub e ;minus bullet y-position
+ ld b,a ;psh a
+ sub 3 ;substract bullet height
+bulletysize =$-1
+ jp p,nohit ;nope, missed it
+ ld a,b ;pop a
+ add a,(ix+1) ;add enemy height
+ dec a ;minus one
+ jp m,nohit ;missed after all
+
+ ;---bullet hits enemy (auch-time!)---
+ psh hl
+ ld hl,0 ;@bulletType
+temp1 =$-2
+ inc hl ;@damage
+ ld a,(hl) ;damage to inflict on enemy
+ ld (hl),-(hitsprites+1);make this bullet exploding (damage = -5)
+ pop hl ;enemy+y
+ cal enemy_hit
+nohit:
pop hl
+ ld bc,enemysize
+ add hl,bc
+ pop bc
+ dnz hit_enemies ;check next enemy
ret
-nohit: pop hl
- inc hl
- inc hl
- inc hl
- inc hl
- djnz hit_enemies ;check next enemy
- ret
+enemy_hit: ;*in:a=damage;hl=enemy+y
+ add a,a ;a=damage to inflict
+ add a,a ;first 2 bits used for occ.
+ ld b,a
-;--------------------------- level events -------------------------------------
+ dec hl ;@x
+ dec hl ;@sprite+1
+ dec hl ;@sprite
+ dec hl ;@hp00 (occ)
+ ld a,(hl) ;load hp00
+ sub b ;decrease HP (if <0xx then c is set)
+ ld (hl),a ;save (no flag-changes)
+ dec hl ;@hp64; no change in c
+ ld a,(hl) ;load; no c-change
+ sbc a,0 ;if cf then decrease a
+ ld (hl),a ;save back the new value
+ ret nc ;if a>=0 then return, otherwise explode
+
+ inc hl ;goto occ again
+ ld (hl),%01 ;set to explode
+
+ ld a,(pickuptimer) ;counts enemies destroyed
+ dec a ;enough destroyed for a pickup?
+ psh af ;save flags and a=0
+ jr nz,pickupdone ;otherwise just explode
+ ld a,pickupfreq ;reset enemies counter
+pickupdone:
+ ld (pickuptimer),a ;save new enemiescounter value
+ inc hl ;@sprite (=explosionFrame)
+ ld (hl),0 ;explosionFrame 0 or enemy #0=pickup
+ pop af
+ cal z,place_enemy ;place pickup (enemy#=0=a cuz ZF)
+
+ ld hl,1 ;increase score by one
+ jp scoreInc ;+ret
+
+;--------------------------- level events -----------------------------------
Level_event:
- ld a,(nextevent)
- dec a
- ld (nextevent),a
- or a
- ret nz
+ ld a,0 ;time to next event
+nextevent =$-1
+ dec a ;decrease counter
+ ld (nextevent),a ;store new value
+ ret nz ;hasn't reached zero yet: get outta here!
+
+ ld bc,0 ;enemy frequency (lvl)
+eventtime =$-2
+ cal Random
+ ld (nextevent),a ;set time to next event
+ ld hl,eventleft
+ dec (hl) ;update enemy-counter
+
+ ld a,(hl) ;look at counter
+ or a ;has it reached 0?
+ jp z,Next_level ;yes: level finished
+ dec a ;has it reached 1?
+ jr z,standby_event ;yes: wait until no enemies present/left
+ dec a ;has it reached 2?
+ jr z,place_boss ;yep: place the BigBossTM!
+ dec a ;has it reached 3?
+ jr nz,place_ranenemy ;nope: >3 = place an enemy
+ inc hl ;nextevent located behind eventleft
+ ld (hl),193 ;3: set delay for next boss to appear
+ ret ;don't place any more enemies
+
+standby_event:
+ ld b,nrenemies
+ ld hl,enemies+1-enemysize
+ ld de,enemysize
+ xor a
+chk_enemyleft:
+ add hl,de ;go to next enemy
+ cp (hl) ;0 = no enemy present
+ jr nz,enemyleft ;if enemy present (<>0) then quit checking
+ dnz chk_enemyleft ;loop for all enemies
+ ld hl,nextevent ;time 'til next event
+ ld (hl),157 ;next time to check is in 157 turns/frames
+ inc a ;no enemies left: place upgrade pickup
+ jr place_enemy ;place enemy #1(=a) = big pickup
+enemyleft:
+ ld hl,eventleft
+ inc (hl)
+ ret
-do_event:
- ld hl,(curevent)
- ld de,enemies-4
-chk_noenemy:
- inc de
- inc de
- inc de
- inc de
- ld a,(de)
- or a ;0 = no enemy present
- jr nz,chk_noenemy
- ld a,(hl) ;type
- ld hl,enemy01
- ld c,a
+place_ranenemy:
+ ld hl,1 ;increase score by 1
+ cal scoreInc
+ ld bc,0 ;0..nrlvlenemies
+nrlvlenemies =$-1 ;=nr of enemies minus 1
+ cal Random ;random enemy b..b+c = 0..nrenemies-1
ld b,0
- add hl,bc
- add hl,bc ;hl = enemy specs
- ld a,(hl) ;load hitpoints+occ of this enemy class
- ld (de),a ;occ
-
- inc hl
- inc de
- ld a,(hl) ;load movement+type of this enemy class
- ld (de),a ;type
-
- inc de
- ld a,$5a ;appear at right edge of screen
- ld (de),a ;x
- inc de
-
- ld hl,(curevent)
- inc hl
+ ld c,a ;bc=a
+ ld hl,lvlenemies
+ add hl,bc ;go to a random enemy
+ ld a,(hl) ;load enemy nr of this mysterious random enemy
+ jr place_enemy
+
+place_boss:
+ ld hl,(levelp) ;the leveldata (including the boss)
+ dec hl ;points to leveldata\boss\enemynr
+ ld a,(hl) ;load enemy# of boss
+
+place_enemy: ;places enemy #=a
+ psh af
+ ld hl,enemies+1-enemysize
+ ld bc,enemysize
+ xor a ;a=0
+chk_noenemy: ;find an unused (no) enemy
+ add hl,bc ;check next enemy
+ cp (hl) ;(hl) = 0 ??
+ jr nz,chk_noenemy ;jump if enemy present (non-0)
+ ex de,hl ;de=hl=usable enemy +1
+ pop af ;enemy# to place
+ cal findenemyspecs ;hl = enemy #a specs
+
+ dec de ;goto hp64 (before occ)
+ ldi ;set hp64
+ ldi ;set hitpoints+occ of enemy class
ld a,(hl)
- ld (de),a ;y
-
- inc hl ;@ next event
+ .db $DD,$6F ;ld hx,a
+ ldi ;set sprite
ld a,(hl)
- cp $ff ;255 = end marker
- jp z,Next_level
- ld (nextevent),a ;else time to next event
+ .db $DD,$67 ;ld lx,a
+ ldi ;set sprite + 1
+ ldi ;set x-position
+ ld a,(hl) ;load placeInfo
inc hl
- ld (curevent),hl ;update pointer
+ dec a ;is it 1?
+ jr z,random_enemy ;yes: create random value <51 in a
+ dec a ;is it 2?
+ jr z,lure_enemy ;yes: create a 100% luring enemy
+ ;otherwise?
+halflure_enemy: ;yes (of course it is): pick one (50% lure)
+ ld a,(timer) ;look at frame-number
+ rra ;make random if odd frame nr.
+ jr nc,random_enemy ;1st possibility: random enemy
+lure_enemy: ;2nd possibility: luring enemy
+ ld a,(y) ;place at same y-pos as YOUR ship
+ jr ypos_OK
+random_enemy:
+ ld a,64-8 ;=57=screen height (8 is scorebar)
+ sub (ix+1) ;minus sprite height=bottom
+ ld c,b ;range=0 to...
+ ld b,a ;...57-y
+ cal Random ;random value on screen
+ypos_OK: ;random value successfully created
+ ld (de),a ;save y-position
+ inc de ;@movecounter
+ ldi ;set move-type
+ ld a,1 ;movecounter = 1
+ ld (de),a ;set
+ inc de ;@firecounter
+ ldi ;set time-to-1st-fire
+ ldi ;set firefreq
+ ldi ; " firetype
+ ret ;return
+
+;--------------------------- enemy fires ------------------------------------
+
+Enemy_fires: ;de = x,y; c = type; ix = enemy_sprite
+ ld hl,ebullets ;first bullet to check
+ ld b,nrebuls
+ dec d
+ dec d ;d = x of firing enemy minus 2
+
+ ld a,(ix+1) ;the height of the enemy firing this bullet
+ srl a ;halved
+ add a,e ;added to his y-position
+ ld e,a ;into e
+ dec e ;minus one (bullet height)
+
+enemy_fires_again: ;same but hl = first bullet possibly free
+ xor a
+find_ebullet:
+ cp (hl)
+ jr z,found_ebullet ;0 = not used
+ inc hl \ inc hl \ inc hl
+ dnz find_ebullet ;look next bullet
ret
-;--------------------------- enemy fires --------------------------------------
-
-Enemy_fires:
- ld a,r
- and %01111111
- cp 19
- ret p
-
- add a,a
- add a,a
- ld c,a
- ld b,0 ;bc = a*4
- ld hl,enemies
- add hl,bc ;hl = enemy
- ld a,(hl)
+found_ebullet:
+ ld a,c
+ sub 6
+ jp c,bulletok ;type #0-5 = done (normal/diag)
or a
- ret z ;return if no enemy
+ jr z,bulletaiming ;type #6 = aiming = type#2..5
dec a
+ jr z,bullettriple ;type #7 = triple
dec a
- ret z ;or exploding enemy
- inc hl
- inc hl
- ld c,(hl) ;enemy x-pos
- dec c
- dec c ;c = x-2
- inc hl
- ld a,(hl) ;y-pos
- inc a
- ld e,a ;e = y+1
+ jr z,bulletdouble ;type #8 = double
+ dec a
+ jr z,bulletquad ;type #9 = quad
+ dec a
+ jr z,bulletdquad ;type #10 = double-quad
+ dec a
+ jr z,bulletran ;type #11 = random
+
+firesenemies: ;type #12 = mine / Dquad
+ ld a,(timer)
+ rra ;if odd turn (50% chance)
+ jr c,bulletdquad ;then fire 6x
+ ld a,bossenemy ;otherwise place enemy #[bossenemy]
+ jp place_enemy
+
+bulletran:
+ ld c,1
+ ld b,4
+ cal Random
+ ld (hl),a
+ jr _bulletok
- ld b,10
- ld hl,ebullets
-find_ebullet:
- ld a,(hl)
- or a
- jr z,found_ebullet ;0 = not used
+bulletdquad: ;type #10 = double-quad
+ cal bulletquad ;fire type #1 to 5
inc hl
+ ld a,e
+ sub 5
+ ld e,a ;offset 5 up
+ ld c,1 ;type #1 = normal
+ cal enemy_fires_again
inc hl
+ ld a,e
+ add a,10
+ ld e,a ;offset 10 down (5 total)
+ jr enemy_fires_again
+
+bulletquad: ;type #9 = quad
+ cal bullettriple ;fire type #1, 4 and 5
+ inc hl ;next bullet
+ ld c,2 ;type #2 = down
+ cal enemy_fires_again
inc hl
- djnz find_ebullet ;look next bullet
- ret
+ ld c,3 ;type #3 = up
+ jr enemy_fires_again
+
+bulletdouble: ;type #8 = double
+ dec e ;one up
+ ld c,1 ;type #1
+ cal bulletok ;fire bullet
+ inc hl ;next bullet position
+ inc e
+ inc e ;two px down
+ jr enemy_fires_again ;find and fire another bullet
+
+bullettriple: ;type #7 = triple
+ ld (hl),1 ;type #1 = normal
+ cal _bulletok ;fire
+ inc hl ;next bullet
+ ld c,4 ;type #4 = down 50%
+ cal enemy_fires_again
+ inc hl
+ ld c,5 ;type #5 = up 50%
+ jr enemy_fires_again
-found_ebullet:
- ld (hl),1 ;use bullet
+bulletaiming: ;type #6 = aiming = type#2..5
+ ld a,(y)
+ sub e ;a = yourY-bulY = pixels bullet is above you
+ add a,10
+ jp p,bulletnotup ;jump when 10 pixels below you or higher
+ ld (hl),5 ;go slightly down
+ add a,10 ;10 to 20 pixels below you
+ jp p,_bulletok ;yes: all done.
+ ld (hl),3 ;otherwise move down even more
+ jr _bulletok
+bulletnotup:
+ ld (hl),1 ;normal bullet...
+ sub 20 ;...when...
+ jp m,_bulletok ;...10 pixels below you to 20 pixels above
+ ld (hl),4 ;bullet going slightly up...
+ sub 10 ;...when...
+ jr c,_bulletok ;...20 to 30 pixels above you
+ ld c,2 ;else (more than 30 pixels) move up more
+
+bulletok:
+ ld (hl),c ;set bullet direction
+_bulletok:
inc hl
- ld (hl),c ;set x-pos
+ ld (hl),d ;set x-pos
inc hl
ld (hl),e ;set y-pos
- ret
+ ret
-;----------------------------- enemy bullets ----------------------------------
+;----------------------------- enemy bullets --------------------------------
Enemy_bullets:
- ld hl,ebullets
- ld b,10
+ ld hl,ebullets ;hl=bullet pointer
+ ld b,nrebuls ;number of bullets (or _possible_ bullets)
handle_bullet:
- push bc
- push hl
- ld a,(hl)
- or a
- jr nz,enemy_bullet
-next_bullet:
- pop hl
- pop bc
- inc hl
- inc hl
- inc hl
- djnz handle_bullet
+ psh bc
+ psh hl
+ ld a,(hl) ;load bulletType in a
+ or a ;bullet present?
+ cal nz,enemy_bullet ;non-0: handle bullet
+ pop hl ;enemy_bullet could've added one or two to hl
+ pop bc ;bullet counter
+ inc hl \ inc hl \ inc hl ;next bullet (3 bytes per bullet)
+ dnz handle_bullet ;loop for each and every bullet
ret
-
enemy_bullet:
- inc hl
- ld a,(hl) ;bullet x
- dec a
- jp m,remove_ebullet ;off screen?
- jr z,remove_ebullet ;"
- dec a ;move left
- ld (hl),a
- ld d,a ;d=x
- inc hl
+ inc hl ;@x
+ ld d,(hl) ;check if it has reached the left side of scrn
+ bit 7,d ;x<0?
+ jr nz,remove_ebullet ;yes, remove bullet
+ dec d ;move one pixel left
+ dec d ;and another one (that makes 2)
+ ld (hl),d ;save new x-coordinate in (HL) and D
+ inc hl ;@y (BTW: x >= -2)
ld e,(hl) ;e=y
- ld ix,spr_bullet11 ;display enemy bullet
- call drw_spr
+ dec a
+ jr z,ebullet_common ;type 1: normal bullet
+ dec a
+ jr z,ebullet_down ;type 2: moving down
+ dec a
+ jr z,ebullet_up ;type 3: moving up
+
+ ld b,a ;save bulletType
+ ld a,(timer) ;load timer
+ rra ;half speed (CF set every other turn)
+ jr c,ebullet_common ;if bit then normal bullet
+
+ dec b
+ jr z,ebullet_down ;type 4: moving down 50%
+ ;type 5: moving up 50%
+ebullet_up:
+ dec e ;move up
+ jp m,ebullet_common ;y<top; don't save new value (so y=0)
+ ld (hl),e
+ jr ebullet_common
+ebullet_down:
+ inc e ;move down
+ ld a,e ;a=y too
+ cp 58-3 ;y>bottom?
+ jr z,ebullet_common ;then keep it there
+ ld (hl),e ;otherwise save new y
+
+ebullet_common:
+ ld ix,spr_bullete1 ;display enemy bullet
+ psh hl
+ cal putsprite
+ pop hl ;we'll need it again
+
+ebullet_hits:
ld a,(your_occ)
or a
- jr nz,next_bullet ;0 = you're normal
+ ret nz ;0 = you're normal
- pop hl
- push hl
- inc hl ;check x
- ld a,(x)
+ ld a,(y) ;check y collision
sub (hl)
add a,6
- jp m,next_bullet
+ ret m
cp 9
- jr nc,next_bullet
+ ret nc
- inc hl ;check y
- ld a,(y)
+ dec hl ;check x
+ ld a,(x)
sub (hl)
add a,6
- jp m,next_bullet
+ ret m
cp 9
- jr nc,next_bullet
-
- call damage_you ;HIT!!
+ ret nc
+ ld b,auch_bullet ;set damage-amount
+ psh hl
+ cal damage_you ;HIT!!
+ pop hl ;save hl to remove the bullet
remove_ebullet:
- dec hl
- dec hl
- ld (hl),0 ;bullet > unused
- jr next_bullet
+ dec hl ;points to bullettype again
+ ld (hl),0 ;bullet > unused
+ ret
-;--------------------------- handle enemies -----------------------------------
+;--------------------------- handle enemies ---------------------------------
Handle_enemies:
- ld hl,enemies
- ld b,20 ;loop 20x
+ ld hl,enemies+1
+ ld b,nrenemies ;handle all enemies
handle_enemy:
- push bc
- push hl
+ psh bc
+ psh hl
ld a,(hl)
- and %00000011
- jr z,next_enemy ;occ "no enemy" 0
- dec a
- jr z,exploding_enemy ;occ "exploding" 1
- ld b,0
+ and %11
+ jr z,next_enemy ;occ "no enemy" 00
dec a
- jr z,normal_enemy ;occ "normal" 2
-
-moving_enemy: ;occ "moving" 3
- ld b,1
+ jr z,exploding_enemy ;occ "exploding" 01
normal_enemy:
- inc hl
- ld a,(hl) ;type
- add a,a
- add a,a
- add a,a
- ld c,a ;type*8 = offset
+ ld c,a ;c = occ-1 = %10 (normal) or %01 (pickup)
+ inc hl ;@sprite
+ cal find_sprite
- inc hl
- ld a,(hl) ;x
- dec a ;move left
- jp m,remove_enemy ;off screen
- jr z,remove_enemy ;"
- ld d,a
-
- inc hl
- ld a,(hl) ;y
- ;;;;;;;;;;;;;;;; ;
- ld (hl),a ;store new y
- ld e,a
+ inc hl ;@x
+ ld d,(hl) ;x
+ inc hl ;@y
+ ld e,(hl) ;y
+ inc hl ;@movetype
+ cal moving_enemy
dec hl
+
+ ld a,e ;new y value
+ cp 57
+ jr c,enemyonscreenY ;=on screen
+ cp -20 ;moved off at top
+ ld e,0 ;reset to top
+ jr nc,enemyonscreenY
+ ld e,57 ;otherwise reset to bottom
+enemyonscreenY:
+ ld (hl),e ;store new y
+ dec hl ;@x
+
+ ld a,d ;new x value
+ cp 129 ;x<=128
+ jr c,enemyonscreenX ;=on screen
+ cp -7 ;x<=-8
+ jr c,remove_enemy ;=off screen
+enemyonscreenX:
ld (hl),d ;store new x
- ld ix,spr_enemy01
- ld b,$00
- add ix,bc
- call drw_spr
- jr next_enemy
+ dec c ;is this a pickup? (c=%01 so ZF=1)
+ jr nz,check_enemyfire ;no, a normal enemy; let em fire
+ jr firing_done ;continue
+
+check_enemyfire:
+ ld bc,4 ;4x inc hl
+ add hl,bc ;@firecount
+ ld a,(hl) ;counter till next blast
+ dec a ;decrease it
+ ld (hl),a ;save new value
+ jr nz,firing_done ;finished if not reached 0 yet
+
+ inc hl ;@firefreq
+ ld a,(hl) ;=time 'til next blast
+ inc hl ;@firetype
+ ld c,(hl) ;in c
+ dec hl
+ dec hl ;@firecount again
+ ld (hl),a ;reset counter for next blast
+ psh de ;save registers for firing-use
+ cal Enemy_fires ;fires bullet
+ pop de ;restore (destroyed by Enemy_fires)
+firing_done:
+ cal putwidesprite ;display sprite @ix
-remove_enemy:
- pop hl
- ld (hl),$0000 ;bye bye enemy
- push hl
next_enemy:
pop hl
- ld bc,$0004
+ ld bc,enemysize
add hl,bc
pop bc
- djnz handle_enemy
+ dnz handle_enemy
ret
exploding_enemy:
- inc hl
- push hl
- ld a,(hl)
- call explosion_stuff ;display explosion
- pop hl
-
+ inc hl
ld a,(hl)
- cp 15
- jr z,remove_enemy ;remove when at last frame
+ cp 16
+ jr nz,keep_enemy ;remove when at last frame
+remove_enemy:
+ pop hl
+ ld (hl),$0000 ;bye bye enemy
+ jr next_enemy+1 ;continue AFTER pop hl (already done)
+keep_enemy:
inc a
ld (hl),a ;next frame
+ dec a ;1-16 -> 0-15
+ ld ix,spr_explosion ;base sprite
+ inc hl ;@x
+ cal explosion_stuff ;display explosion
jr next_enemy
-;--------------------------- check collision ----------------------------------
+;--------------------------- moving enemies ---------------------------------
-Enemies_hit:
- ld a,(your_occ)
- or a ;0 = you're normal
+moving_enemy:
+ dec d ;move left once
+ ld a,(hl) ;how does this enemy move?
+ and a
+ ret z ;0 = (1<)
+ ld b,a
+ ld a,(timer)
+ dec b
+ jr z,movetype_updown ;1 = (1<) up / down
+ dec b
+ jr z,movetype_vslow ;2 = (.25<)
+ dec b
+ jr z,movetype_slow ;3 = (.5 <)
+ dec b
+ jr z,movetype_lslow ;4 = (.75<)
+ dec b
+ jr z,movetype_fast ;5 = (1.5<)
+ dec b
+ jr z,movetype_vfast ;6 = (2 <)
+ dec b
+ jr z,movetype_slowlure ;7 = (1<) move y towards you 50%
+
+ inc d ;speed 0
+ dec b
+ jr z,movetype_lure ;8 = (0) move y towards you
+ dec b
+ jr z,movetype_slowlure ;9 = (0) lure 1/2 speed
+ dec b
+ jr z,movetype_fulllure ;10 = x+y towards you 1/2 speed
+ dec b
+ jr z,movetype_right ;11 = (.5>)
+ dec b
+ jr z,movetype_fright ;12 = (1>)
+
+movetype_right:
+ rra
+ ret c ;speed 0 50%
+movetype_fright:
+ inc d ;move right one px
+ ret
+
+movetype_fulllure:
+ rra
+ ret c ;50% speed
+ cal movetype_lure
+ ld a,(x)
+ cp d
+ jr c,movetype_vfast ;moves left (again)
+lure_right:
+ inc d ;move right
+ ret
+
+movetype_slowlure:
+ rra ;half the time
+ ret c
+movetype_lure:
+ ld a,110
+ cp d
+ jr nc,dothelurethingy
+ dec d ;x>109: move left
+dothelurethingy:
+ ld a,(y)
+ cp e
+ ret z ;don't move vertically if equal
+ jr c,lure_up ;below you then move up
+lure_down: ;above then move down
+ inc e
+ ret
+lure_up:dec e
+ ret
+
+movetype_smart:
+ inc hl ;@movecount
+ ld a,(hl)
+ inc a
+ and %1111
+ ld (hl),a
+
+ or a ;reset carry flag
+ dec hl ;reset hl to <y>
+ and %11111100
+ jr z,movetype_fast
+
+movetype_lslow:
+ and %11
ret nz
+ inc d ;don't move 25% of the time
+ ret
+movetype_slow:
+ rra
+ ret c
+ inc d ;don't move 50%
+ ret
+movetype_vslow:
+ and %11
+ ret z
+ inc d ;don't move 75%
+ ret
+
+movetype_fast:
+ rra
+ ret c ;once every other turn
+movetype_vfast:
+ dec d ;move left twice
+ ret
+
+movetype_updown:
+ inc hl ;@movecount
+ ld a,(hl)
+ dec a
+ and 127 ;range 0..127
+ ld (hl),a ;store new movecounter
+ dec hl ;reset hl to @movetype
+ and %00100000 ;ZF changes once every 64 turns
+ ld a,e ;load current y-position
+ jr z,movedown
+moveup: dec a ;decrease y-pos (=move up)
+ ret m ;don't move off the screen (y<0)
+ dec e ;save new y-pos
+ ret ;finish
+movedown:
+ inc a ;increase y-pos
+ cp 55 ;compare with bottom
+ ret nc ;return if it has passed that line (>40)
+ inc e ;otherwise save new position
+ ret ;and return
+
+;--------------------------- check collision --------------------------------
+
+Enemies_hit:
+ ld hl,(x) ;e = X, d = Y
+ ld de,$0707 ;add 7 to both d and e
+ add hl,de
+ ex de,hl ;e = X+7, d = Y+7
- ld de,(x) ;e = X, d = Y
- ld hl,enemies
- ld b,20 ;check all 20 enemies
+ ld hl,enemies+1
+ ld b,nrenemies ;check all 20 enemies
check_collision:
- push hl
+ psh bc ;counter
+ psh hl ;pointer
ld a,(hl)
- and %00000010
- jr z,check_next ;2/3 = ok
+ and %10 ;enemy status (%11=normal; %10=pickup)
+ jr z,check_next ;2 or 3 = ok, otherwise: next enemy
+ inc hl ;@sprite
- inc hl
- inc hl
+collide_enemy: ;&&& include in Handle_enemy proc
+ cal find_sprite
+
+ inc hl ;@x
ld a,(hl) ;check x match
- sub e
+ sub e ;enemy position minus yours minus 7
+ jp p,check_next
add a,6
+ add a,(ix) ;enemy width
jp m,check_next
- cp 12
- jr nc,check_next
- inc hl
+ inc hl ;@y
ld a,(hl) ;check y match
- sub d
+ sub d ;same as with x-check
+ jr nc,check_next ;(=jp p)
add a,6
+ add a,(ix+1) ;enemy height
jp m,check_next
- cp 12
- jr nc,check_next
-
- dec hl
- dec hl
- xor a
- ld (hl),a ;explosionFrame 0
- dec hl
- inc a
- ld (hl),a ;set to explode
- call damage_you ;auch!
+ dec hl ;@x
+ dec hl ;@sprite+1
+ dec hl ;@sprite
+ dec hl ;@occ
+
+take_pickup:
+ ld a,(hl) ;load enemy occ
+ rra ;if occ = %10 (can't be %00) then pickup
+ jr c,collide ;otherwise normal enemy so you collide
+ ld (hl),0 ;remove
+ rra ;skip this bit (=%1)
+ rra ;this bit specifies the pickup ID (big/small)
+ jr nc,armorpickup ;%0 = pickup increases armor and shield
+ ;%1 = pickup selects (next) upgrade
+ ld hl,your_pickup ;your pickups
+ ld a,(hl) ;current
+ inc a ;go to next
+ cp 4 ;pickups >=4?
+ jr c,not_maxpickup
+ psh hl ;too much pickups
+ ld hl,250
+ cal scoreInc ;increase score by 250
+ pop hl
+ ld a,1 ;and reset to pickup #1
+not_maxpickup:
+ ld (hl),a ;save new
+ psh de
+ cal disp_icons ;display altered pickupicons
+ pop de ;ld de,$0707
+ jr check_next ;all done, next..
+
+armorpickup:
+ cal inc_armor ;increase armor (like at end of level)
+ ld a,30 ;activate shield for 30*4=120 frames
+ ld (your_shield),a
+ cal disp_icons ;display status bar (new armor value)
+ jr check_next
+
+collide:
+ ld a,(hl)
+ sub auch_ecollide
+ ld (hl),a
+ jr nc,enemydamaged ;enemy still ok (HP>=0)
+ ld (hl),%01 ;set to explode
+ inc hl
+ ld (hl),0 ;explosionFrame 0
+enemydamaged: ;damage to enemy delivered
+ ld b,auch_collide ;your damage
+ cal damage_you
check_next:
+ pop hl ;current enemy base (unaltered)
+ ld bc,enemysize ;bytes per enemy
+ add hl,bc ;pointer to next enemy
+ pop bc ;restore counter
+ dnz check_collision ;loop for all enemies
+ ret
+
+;--------------------------- story ------------------------------------------
+
+storyPage:
+ psh hl ;hl will be destroyed by _clrLCD
+ cal _clrLCD ;clear screen
pop hl
+ ld a,(hl)
+ ld (curline),a ;begin line for special effect
+storyLine:
+ ld d,(hl) ;vertical position of text
inc hl
+ ld e,(hl) ;horizontal text-position
+ ld (_penCol),de ;set position
inc hl
+ cal _vputs ;display text
+
+ ld a,(hl) ;load next byte
inc hl
- inc hl
- djnz check_collision
+ or a ;0 means more text
+ jr z,storyLine ;loop if there is
+
+ psh af
+ psh hl
+ ld hl,VIDEO_MEM ;copy text
+ ld de,dispbuffer ;to GRAPH_MEM
+ ld bc,1024 ;entire screen
+ ldir
+ cal _clrLCD ;clear VIDEO_MEM
+ pop hl
+ pop bc ;last byte (<>0) is lines to SFX
+ psh hl
+ cal DoSFX ;do special effects
+ cal getsomekeys ;wait for a key
+ pop hl
ret
-;--------------------------- next level ---------------------------------------
+dostory:
+ cal storyPage ;do some story
+ ld a,(hl) ;load next byte in a
+ inc a ;set z-flag if a = $ff
+ jr nz,dostory ;otherwise loop
+ inc hl
+ inc hl ;set hl to beginning of the level
+ ld (levelp),hl ;set the level-pointer
+ ret ;and return
-Next_level:
- ld hl,Leveldata+1 ;reset level data
- ld (curevent),hl
+;--------------------------- SFX --------------------------------------------
- call _clrLCD ;clear screen
- ld hl,$0703
- ld (_curRow),hl ;center
- ld hl,txt_level
- call _puts ;display "LEVEL "
+DoSFX: ;in:(curline)=beginLine;b=nrOfLines
+SFXloop:
+ psh bc
- ld a,(level)
- inc a ;increase level nr.
- ld (level),a
+ ld a,0 ;get line number
+curline =$-1
+ inc a ;go to the next line
+ ld (curline),a ;update
ld l,a
- ld h,$00
+ ld h,0 ;hl=a
+ add hl,hl
+ add hl,hl
+ add hl,hl
+ add hl,hl ;*16 (a pixels down=a*16)
+ sub 64 ;a=a-64
+ neg ;a=64-a (lines from bottom)
+
+ ld b,h ;save hl for later
+ ld c,l
+ ld de,VIDEO_MEM ;where to put sfx
+ add hl,de ;go to ymin
+ ex de,hl ;put into de again
+ ld hl,dispbuffer ;source of original
+ add hl,bc ;hl->source
+
+SFXdisp: ;display this frame on screen
+ ld bc,16 ;one line (=16 bytes, you'd know by now)
+ ldir ;display (copy actually)
+ ld bc,-16 ;go up one line (not on screen)
+ add hl,bc ;so the same line will be displayed
+ dec a ;counter
+ jr nz,SFXdisp ;repeat until whole screen is displayed
+
+ ld b,8
+SFXdelay:
+ halt ;delay
+ dnz SFXdelay ;8x
+
+ pop bc ;counter
+ dnz SFXloop
+ ret
- call UNPACK_HL
- add a,'0'
- ld b,a
- call UNPACK_HL
- add a,'0'
- call _putc ;display second digit
- ld a,b
- call _putc ;display first digit
+;--------------------------- proc -------------------------------------------
+
+Random: ;a=c<random<b+c; destr:none
+ psh hl
+ ld hl,rancount ;amount to increase with (0-255)
+randomloop:
+ inc (hl) ;change for next time
+ ld a,r ;value $0-7F (can be _anything_ so watch out!)
+ add a,0 ;add to last random value
+ranseed =$-1 ;SMC :P
+ add a,(hl) ;add the changing increase value
+ ;(this is because R can be anything;
+ ; ie always be even so freeze when a must be 1<=a<=1)
+ ld (ranseed),a ;save for next time
+ cp b ;a>=b
+ jr nc,randomloop ;then add again
+ add a,c ;a<b; a=a+c
+ pop hl
+ ret
+rancount: .db 0
+
+RandomY: ;HL = random Y 0..50 right side ((1..51)*16-1)
+ psh bc
+ ld bc,50*256+1 ;range=1..51
+ cal Random ;a = 1..51
+ ld h,0
+ ld l,a ;hl = 1..51
+ add hl,hl
+ add hl,hl
+ add hl,hl
+ add hl,hl ;hl = 1..51 * 16 (left side at random y)
+ dec hl ;hl = 0..50 * 16 (" at right side of screen)
+ ld de,dispbuffer
+ add hl,de ;position on screen
+ pop bc
+ ret
- ld b,$20
-wait: halt \ halt
- djnz wait ;delay
- call _getkey ;wait for keypress
+scoreInc: ;increase score by HL
+ psh bc ;don't destroy bc (or any registers Xcept hl)
+ ld bc,(your_score) ;your current score in bc
+ psh af ;don't destroy a either
+ ld a,(hardcore) ;load hardcore mode settings in a
+ or a ;is it zero?
+ jr z,scoreincok ;then skip the next instruction (score = ok)
+ add hl,hl ;otherwise (hardcore) double the inc.score
+scoreincok:
+ pop af ;restore a register
+ add hl,bc ;add bc to hl (or vice versa)
+ ld (your_score),hl ;save new increased score
+ pop bc ;all registers to what they were
+ ret
+find_sprite: ;in:hl=enemy+type | out:ix=sprite to enemy
+ ld a,(hl) ;sprite byte #1
+ .db $DD,$6F ;ld hx,a
+ inc hl ;@sprite+1
+ ld a,(hl) ;sprite byte #2
+ .db $DD,$67 ;ld lx,a ;ld ix,(hl)
ret
-;--------------------------- putsprite ----------------------------------------
+BLACKLCD:
+ ld hl,VIDEO_MEM ;screen location (top left)
+ ld de,VIDEO_MEM+1
+ ld (hl),%11111111
+ ld bc,1024-1 ;do it 1024 times = entire screen
+ ldir
+ set 3,(iy+5) ;set white on black
+ ret
-offsets_table:
- .db 128,64,32,16,8,4,2,1
-drw_spr:
- ld a,d
- and 7
- ld hl,offsets_table
- ld c,a
- ld b,0
- add hl,bc
+getsomekeys:
+ halt ;wait a li'l while and save batteries :P
+ halt
+ cal GET_KEY ;input keys
+ or a
+ jr z,getsomekeys ;wait if none
+ cp K_SECOND ;2nd pressed?
+ ret z ;then return with zf set
+ cp K_ENTER ;enter pressed
+ ret ;then return with zf set, otherwise zf reset
+
+releasekeys:
+ halt
+ ld a,%10000000 ;all key-masks
+ out (1),a
+ in a,(1)
+ inc a ;cp %11111111 (no keys pressed)
+ jr nz,releasekeys ;keep waitin
+ jp GET_KEY ;clear buffer
+
+findenemyspecs: ;enemy #a specs in (hl); in:b=0; out:ac=?
+ ld hl,enemyspecs ;enemy "0" specs
+ add a,a ;a=type*2
+ ld c,a ;b=0; bc=c=a=type*2
+ add hl,bc ;hl = enm#0 + type*2
+ add a,a ;a=type*4 (max.type<64)
+ ld c,a ;bc=type*4
+ add hl,bc ;hl = enm#0 + type*6
+ add hl,bc ;hl = enm#0 + type*10
+ ret ;hl = enemy specs
+
+;--------------------------- game over / new game / death -------------------
+
+chartable: ;use chartable-1 and add GET_KEY scancode
+ .db ".<>!",0,0,0,0 ;down,L,R,up
+ .db 0,"xtoje0",0 ;enter..clear
+ .db " wsnid9",0 ;(-)..custom
+ .db "zvrmhc8",0 ;dot..del
+ .db "yuqlgb7#" ;0..xvar
+ .db $D9,"-pkfa6'" ;on..alpha
+ .db "54321",$D0,0,'*' ;F5..F1,2nd,exit,more
+
+save_lvl:
+ ld hl,storesave_end-storesave_start
+ psh hl ;size
+ ld hl,storesave_start
+ psh hl ;dest
+ ld hl,4+storesave_start-_asm_exec_ram
+ psh hl ;src
+ jr storesmtn
+
+save_hi:
+ ld hl,storehi_end-storehi_start
+ psh hl ;size
+ ld hl,storehi_start
+ psh hl ;destination
+ ld hl,4+storehi_start-_asm_exec_ram
+ psh hl ;source
+
+storesmtn: ;stores data [stack=src; stack+1=dest; stack+2=size]
+ ld hl,_asapvar ;find own variable
+ rst 20h ;cal _ABS_MOV10TOOP1
+ rst 10h ;cal _FINDSYM
+
+ xor a ;bde=pointer to begin of real program
+ pop hl ;data offset
+ add hl,de ;hl=pointer to data in real prog
+ adc a,b ;if hl overflow also increase a
+ cal _SET_ABS_DEST_ADDR ;destination = real program = ahl
+ xor a ;RAM page #0
+ pop hl ;data position in normal program ($D748+)
+ cal _SET_ABS_SRC_ADDR ;set as source (ahl)
+ pop hl ;size
+ cal _SET_MM_NUM_BYTES ;set
+ cal _mm_ldir ;copy data to real program
+ jp _RAM_PAGE_1 ;and finally: reset ram page
+
+game_over: ;stack=+0
+ cal BLACKLCD ;clear screen
+ ld hl,$0603
+ ld (_curRow),hl ;center
+ ld hl,txt_gameover
+ cal _puts ;display "GAME OVER"
+ cal releasekeys ;wait for all keys to be released
+
+ ld hl,$0007
+ ld (_curRow),hl
+
+ ld de,(your_score) ;current score
+ ld hl,(hiscore) ;hiscore
+ cal CP_HL_DE ;de<=hl means no hiscore (or same)
+ jr nc,no_hiscore ;skip the new hiscore part
+ ld (hiscore),de ;otherwise save current score as new hiscore
+
+ask_hiname: ;and ask for new hiscore name
+ ld ix,hiname ;where to store the hiscore name
+ ld a,9 ;max. length <9
+ ld (hiscorepos),a ;current char (counts backwards 9-1)
+enter_name_loop:
+ ld a,'_' ;cursor appearance
+ cal _putmap ;display (do not advance cursorpos)
+nokeypressed:
+ cal getsomekeys ;wait for any key
+ jr z,nomore ;if [enter] or [2nd] pressed we're all done
+
+ ld hl,hiscorepos ;string position
+ cp K_DEL ;[DEL] functions as "backspace"
+ jr z,backup ;delete previous char if pressed
+ cp K_EXIT ;exit also ends name
+ jr z,nomore
+
+ ld b,(hl) ;(hiscorepos)
+ dec b ;next position (counts backwards)
+ jr z,nokeypressed ;if it's 1 (became 0) then don't add no more
+ ld (hl),b ;otherwise save new string position
+
+ ld hl,chartable-1 ;chars to add for each key
+ ld e,a
+ ld d,0 ;de = key pressed
+ add hl,de ;add so we know which char to add for this key
+ ld a,(hl) ;load in a
+ or a ;if it's 0 then
+ jr z,nokeypressed ;don't add anything afterall
+
+ ld (ix),a ;save new char
+ cal _putc ;and also display on screen
+ inc ix ;goto next char
+ cal releasekeys ;wait for the key to be released
+ jr enter_name_loop ;and continue the loop
+
+backup: ;backspace
+ ld a,(hl) ;(hiscorepos)
+ cp 9 ;9 means begin (0 total chars)
+ jr nc,nokeypressed ;nothing to remove so continue loop
+ inc (hl) ;otherwise pos one back
+
+ dec ix ;and string to previous char as well
+ ld a,32 ;remove cursor
+ cal _putmap ;by replacing it by ' '
+ ld hl,_curCol
+ dec (hl) ;cursor one back
+ jr enter_name_loop ;continue name loop
+
+nomore: ;name's done
+ ld a,' ' ;remove cursor
+ cal _putc ;(or actually replace with ' ')
+ ld (ix),0 ;end of string marker (zero-terminated)
+ cal save_hi ;store hiscore with name in real program
+ jr hiscoredone ;continue with game over screen
+
+no_hiscore: ;no new hiscore
+ ld hl,hiname ;just display old name
+ cal _puts
+hiscoredone:
+ xor a ;clear a (Ahl will be displayed)
+ ld hl,$1006 ;bottom-1 right
+ ld (_curRow),hl ;set
+ ld hl,(your_score) ;your score
+ cal _dispahl ;display it (a=0)
+
+ ld hl,$314b ;bottom-1 right before score ^^
+ ld (_penCol),hl ;set
+ ld hl,txt_score ;"Score"
+ cal _vputs ;display (small)
+
+ ld hl,$1007 ;bottom right
+ ld (_curRow),hl ;set
+ ld hl,(hiscore) ;hi-score
+ cal _dispahl ;display
+ ld hl,$3946 ;bottom right before hiscore ^^
+ ld (_penCol),hl ;set
+ ld hl,txt_hiscore ;"Hiscore"
+ cal _vputs ;display (small)
+ res 3,(iy+5)
+
+ ld b,16
+ ld de,16
+ ld hl,VIDEO_MEM+(49*16)-1
+restore_line:
+ set 1,(hl)
+ add hl,de
+ dnz restore_line
+
+ cal getsomekeys ;wait for keypress
+ jp quit ;restore some things and return to TI-OS/shell
+
+invship: ;procedure used in New_game
+ psh af
+ inc b
+ ld de,$C0
+ ld hl,VIDEO_MEM+$30-$C0;begin pos
+invshipinit:
+ add hl,de
+ dnz invshipinit
+ ld b,$B0 ;12 lines down
+invshiploop:
ld a,(hl)
- ld (_smc1+1),a
+ cpl ;invert byte
+ ld (hl),a
+ inc hl
+ dnz invshiploop ;loop
+ pop af
+ ret
- ld (_smc1+1),a
- ld hl,GRAPH_MEM
- ld a,e
- add a,a
+New_game: ;stack must be +1 (so change the jp in cal :)
+ cal _clrLCD
+ ld a,VIDEO_MEM/$400
+ ld (PutWhere),a ;will be reset after displaying iconbar
+ ld ix,spr_ship01 ;first ship: sprite
+ ld de,$0105 ;position
+ ld b,4 ;number of ships to display
+dispshipsloop:
+ psh bc ;counter
+ psh de ;position
+ ld h,e
+ ld l,40 ;x=40
+ ld (_penCol),hl ;small cursor position
+ psh ix ;ix destroyed by _vputmap
+ ld hl,txt_difhardcore ;hardcore ships text
+ ld a,b ;ship displaying (4 to 1)
+ dec a ;minus 1 (3..0)
+ psh af
+ and %10 ;gives 1,1,0,0 (for ships 0,0,1,1)
+ jr z,dispdifficulty ;0 indicates hardcore difficulty ship
+ ld hl,txt_difnormal ;normal difficulty ships text
+dispdifficulty:
+ cal _vputs ;display difficulty
+ ld a,95
+ ld (_penCol),a ;set x=95
+ pop af ;ship nr (backwards 3..0)
+ ld hl,txt_updouble ;updouble for ships 1
+ and %1 ;gives 0,1,0,1 (for ships 0,1,0,1)
+ jr nz,dispsbeam
+ ld hl,txt_tailbeam ;tailbeam for ships 0
+dispsbeam:
+ cal _vputs ;display special beam type
+ pop ix
+ pop de
+ psh de ;peek de
+ cal putwidesprite ;display ship
+ pop de
+
+ ld bc,spr_ship01i-spr_ship01+2
+ add ix,bc ;go to next ship
+ ld a,12 ;below the previous one
add a,e
+ ld e,a
+ pop bc
+ dnz dispshipsloop ;loop
+
+ ld b,0 ;menu pos.
+selectship:
+ psh bc
+ cal invship
+selectshiploop:
+ cal getsomekeys
+ pop bc
+ jr z,startthenewgame ;enter/2nd
+ psh bc
+ cal invship
+ pop bc
+ cp K_DOWN
+ jr nz,selnotdown
+ inc b ;move selection down
+selnotdown:
+ cp K_UP
+ jr nz,selnotup
+ dec b ;move selection up
+selnotup:
+ ld a,b ;new selection
+ and %11 ;must be 0..3
+ ld b,a ;in b again
+ jr selectship ;loop
+
+startthenewgame:
+ ld hl,spr_ship01-(spr_ship02-spr_ship01)
+ ld de,spr_ship02-spr_ship01
+ psh bc ;save b (ship#)
+ inc b ;your ship #0-3++
+ ld a,b ;ship #1-4
+searchyourship:
+ add hl,de ;next ship
+ dnz searchyourship
+ ld (your_ship),hl
+ and 1 ;gives: 1,0,1,0 for the ships
+ inc a ;ships now give 1,2,1,2
+ ld (your_extramode),a ;sets tail beam or up double (1 or 2)
+ pop af ;ship# 0..3
+ and %10 ;ships give 0,0,1,1
+ ld (hardcore),a ;hardcore mode set for ships 3 and 4
+ xor a ;ld a,0
+ ld (your_score),a ;reset score
+ ld (your_score+1),a ;reset score (0)
+ ld (your_extra),a ;no extra beam
+ ld (your_weapon),a ;no laser
+ ld (your_pickup),a ;reset pickups
+ ld (your_multiples),a ;no multiples
+ inc a ;ld a,1
+ ld (level),a ;reset level nr (#1)
+ ld hl,levelstart ;set level pointer to level#1
+ ld (levelp),hl ;reset level pointer
+ ld a,4
+ ld (your_lives),a ;3 lives (4 will be decreased @ You_die)
+ ld (pickuptimer),a ;next pickup after 4 enemies destroyed
+
+You_die: ;stack must be +1
+ pop hl ;restore stack
+ ld a,24
+ ld (your_armor),a ;24 HPs/shields
+ ld a,(your_lives) ;load lives left
+ dec a ;decrease lives
+ ld (your_lives),a ;if lives=0ffh GO
+ inc a ;if -1 then zf set now
+ jp z,game_over ;and game's over
+ jr samelevel
+
+gamedone:
+ cal dostory ;display end (hl=(levelp))
+ ld hl,250
+ cal scoreInc ;game complete bonus: 250
+ jp game_over ;game over (+hiscore)
+
+;--------------------------- next level -------------------------------------
+
+Next_level: ;stack must be +1
+ pop hl
+
+ cal inc_armor ;increase armor
+
+ ld hl,(levelp) ;level pointer
+ ld b,0 ;advance one level
+ ld c,(hl)
+ add hl,bc ;passed the enemies
+ ld c,9
+ add hl,bc ;update to point to next level
+ ld (levelp),hl ;save
+
+ ld a,(level) ;level number
+ inc a ;next level #
+ cp endlevel+1 ;last level done?
+ jr nc,gamedone ;yes: display end story and quit
+ ld (level),a
+
add a,a
- rl b
add a,a
- rl b
- srl d
- srl d
- srl d
- add a,d
- jr nc,_n1
- inc b
-_n1: ld c,a
- add hl,bc
-
- ld d,(ix)
- ld b,(ix+1)
-_oloop: push bc ;Save # of rows
- push hl ;Save screen address
- ld b,d ;Load width
- ld c,(ix+2) ;Load one line of image
- inc ix
-_smc1: ld a,1 ;Load pixel mask
-_iloop: sla c ;Test leftmost pixel
- jr nc,_noplot ;See if a plot is needed
- ld e,a ;OR pixel with screen
- or (hl)
- ld (hl),a
- ld a,e
-_noplot: rrca
- jr nc,_notedge ;Test if edge of byte reached
- inc hl ;Go to next byte
-_notedge:djnz _iloop
- pop hl ;Restore address
- ld bc,12 ;Go to next line
- add hl,bc
- pop bc ;Restore data
- djnz _oloop
- ret
+ ld h,0 ;increase score....
+ ld l,a ;by level number * 4
+ ld bc,20
+ add hl,bc ;plus 20
+ cal scoreInc ;update score
+
+samelevel:
+ ld hl,invertmode
+ ld de,_invert ;sets B<>W mode
+ ldi ;ld (_invert),(invertmode)
+ ld de,your_shipspr ;sets your ship's sprite
+ ldi ;ld (your_shipspr),(your_ship)
+
+ ld a,80
+ ld (nextevent),a ;time to first enemy appearance
+
+ ld hl,(levelp) ;level pointer
+ dec hl ;byte before level (boss byte)
+ xor a ;if it's zero it means here's a story
+ cp (hl)
+ inc hl ;begin of level
+ cal z,dostory ;do the story and set (levelp) to real level
+
+ ld a,(hl) ;number of (different) enemies in this level
+ inc hl
+ ld c,a
+ ld (nrlvlenemies),a ;set nr of enemies-1
+ ld b,0 ;bc=c so we can use ldir
+ ld de,lvlenemies ;table of enemies
+ ldir ;load enemies to table
+ ld a,(hl) ;load new appearance-time
+ ld (eventtime),a
+ inc hl
+ ld a,(hl)
+ ld (eventtime+1),a ;set
+ inc hl
+ ld a,(hl) ;load nr of enemies in this level
+ ld (eventleft),a ;set nr of events left
+ inc hl
+ ld de,level_info
+ ld c,4 ;5xLDI: loads (level_info) (spacespace)
+ ldir ; (stars1) (stars2)
+ ld a,1
+ ld b,32 ;fill (groundpos) and (ceilingpos)
+fillground:
+ ld (de),a
+ inc de
+ dnz fillground
+
+ ld ix,starx1
+ ld b,nrstars1
+ cal placestars
+ ld ix,starx2
+ ld b,nrstars2
+ cal placestars
+ xor a
+ ld (timer),a ;reset time
+ ld hl,your_occ ;hl = your_occ
+ ld (hl),a ;reset your ship (not exploding)
+ inc hl ;hl = your_shield
+ ld (hl),25 ;set 25*4=100 frames shielded
+ ld de,$1820
+ ld (x),de ;begin position (x,y)
+ cal Place_multiples ;place all multiple-positions at that (0,24)
+
+ cal loadweapon ;load (your_weapon)
+
+ ld hl,enemies ;remove all enemies and bullets
+ ld (hl),0 ;clear first byte
+ ld de,enemies+1 ;copy this to the next byte
+ ld bc,(nrenemies*enemysize)+(nrybuls*4)+(nrebuls*3)-1
+ ldir ;clear enemies + bullets (y/e)
+
+;--------------------------- setup game -------------------------------------
+
+game_setup:
+ cal BLACKLCD ;white on black
+ ld hl,txt_level
+ ld de,$0703
+ ld (_curRow),de ;center
+ cal _puts ;display "LEVEL "
+
+ ld a,(level) ;current level
+ ld l,a
+ ld h,0 ;in hl
+ cal UNPACK_HL ;create first digit
+ add a,'0' ;0-9
+ ld b,a ;into b
+ cal UNPACK_HL ;second digit
+ add a,'0' ;0-9
+ cal _putc ;display second digit
+ ld a,b
+ cal _putmap ;display first digit
+
+ ld hl,txt_lives ;bar text: "Lx0"...
+ ld de,$0904
+ ld (_curRow),de ;display lives left below level nr
+ cal _puts
+ ld a,(your_lives) ;lives left
+ add a,'0' ;make value 0='0'
+ cal _putc
+
+ cal releasekeys ;wait for user to release all keys
+ ld hl,txt_savekey ;"Press [F1] to save"
+ ld de,$3A46 ;bottom-right
+ ld (_penCol),de
+ cal _vputs
+
+ res 3,(iy+5) ;set white on black
+ cal getsomekeys ;wait for keypress
+ cp K_F1
+ cal z,save_lvl
+
+ cal _clrLCD ;clear screen
+ cal disp_icons ;display bottom icons +ret
+ jp game_main_loop
+
+placestars:
+ cal RandomY ;a = random y-pos 1..bottom
+ ld a,b ;a = b = star nr. = 1..7
+ add a,a ;a = 2b = 2..14
+ ld d,0
+ ld e,a ;de = a = 2-14
+ or a
+ sbc hl,de ;substract from random y => random pos anywhere
+ ld (ix),l ;save x-pos (l)
+ ld (ix+1),h ;save y-pos (h)
+ inc ix \ inc ix ;next star
+ dnz placestars ;repeat for all stars
+ ret
-_D_HL_DECI:
- push bc
- ld de,up_data+4
- ld b,5
-ldhld: call UNPACK_HL
- add a,'0'
- ld (de),a
- dec de
- djnz ldhld
- ld hl,up_data
- ld b,4
-lis: ld a,(hl)
- cp '0'
- jr nz,dis
- ld (hl),' '
- inc hl
- djnz lis
-dis: ld hl,up_data
- call _puts
- pop bc
- ret
+loadweapon:
+ ld a,(your_weapon)
+ add a,a ;weap*2
+ add a,a ; *4
+ add a,a ; *8
+ ld c,a
+ ld b,0
+ ld hl,weapondata
+ add hl,bc
+ ld a,(hl)
+ ld (weapdamage),a ;damage of bullets
+ inc hl
+ ld a,(hl)
+ ld (weapdaminc),a ;damage increase
+ inc hl
+ ld a,(hl)
+ and %00011111 ;laser duration
+ ld (laserdur),a
+ ret
-up_data: .db "PAD98",0
+;----------------------------------------------------------------------------
+;--------------------------- putsprite --------------------------------------
+;----------------------------------------------------------------------------
+;in: de=(x,y); ix=sprite
+;out: ix=behind sprite; hl:a=right below sprite; b=0; d=width; ce=?
+
+putsprite:
+ ld c,(ix) ;save width
+_putsprite: ;putsprite with custom width
+ ld a,d ;a=X
+ bit 7,d ;check sign bit of X
+ jr z,CSpositive ;X>=0
+
+ neg ;a=|X|
+ cp (ix) ;off screen?
+ ret nc ;X<=-width: don't draw at all
+ ld b,a ;b=|X|mod 8=1..7=bits to draw
+ ld a,%11111111 ;all bits set (draw everything)
+CSclipleft:
+ srl a ;remove first bit in a for each b
+ dnz CSclipleft ;b=1: a=%01111111
+ ;b=2: a=%00111111
+ ;b=3: a=%00011111
+ ;b=4: a=%00001111
+ ;b=5: a=%00000111
+ ;b=6: a=%00000011
+ ;b=7: a=%00000001
+ res 7,d ;X+128 (right side of screen)
+ dec e ;Y--
+ jr CSdisplay ;done clipping
+
+CSpositive:
+ sub 129-8 ;minus (screen width - byte width)
+ ld b,a
+ ld a,%11111111 ;clipmask
+ jr c,CSdisplay ;x+width<128 then entire sprite is on screen
+ inc b ;b = number of pixels off screen
+CSclipright:
+ add a,a ;remove last bit in a for each b
+ dnz CSclipright ;b=1: a=%11111110
+ ;b=2: a=%11111100
+ ;b=3: a=%11111000
+ ;b=4: a=%11110000
+ ;b=5: a=%11100000
+ ;b=6: a=%11000000
+ ;b=7: a=%10000000
+ ;b>7: a=%00000000 = off screen
+
+CSdisplay: ;display the sprite ix at (d,e) masked
+ ld (CSclipmask),a ;set mask
+ cal findpixel ;convert de to screen location hl:a
+ ld (CSbitmask),a
+
+ ld d,c ;width
+ ld b,(ix+1) ;height
+CSyloop:
+ psh bc ;save rows to go
+ psh hl ;screen
+ ld b,d ;width
+ ld a,(ix+2) ;load image line
+ and 255 ;mask
+CSclipmask =$-1
+ ld c,a ;c=image
+ inc ix ;next
+CSbitmask =$+1
+ ld a,1 ;saved bitmask
+CSxloop:
+ sla c ;test leftmost pixel
+ jr nc,CSnodraw ;don't draw if it's 0
+ ld e,a ;psh af: save bitmask
+ or (hl)
+ ld (hl),a ;OR pixel with screen
+ ld a,e ;pop af
+CSnodraw:
+ rrca ;next bit
+ jr nc,CSbitdrawn ;carry set if bit "jumped"
+ inc hl ;next byte
+CSbitdrawn:
+ dnz CSxloop
+ pop hl ;screen at x-offset=0
+ ld bc,16
+ add hl,bc ;next line
+ pop bc ;rows counter
+ dnz CSyloop
+CSdone: ret
+
+;--------------------------- putbigsprite -----------------------------------
+
+putwidesprite:
+;destr: abcdehl+ix (ix=behind sprite; hl:a=right below sprite; b=0; d=width)
+ ld a,(ix) ;width
+ cp 9
+ jr c,putsprite ;width<=8: just draw the sprite
+
+ ld a,(ix)
+ sub 8 ;width>8
+ psh af
+ ld c,8
+ psh de
+ cal _putsprite ;otherwise draw one column (8 pixels wide)
+ pop de
+ inc ix ;no x-size to load
+ ld a,8 ;next
+ add a,d ;8 pixels right
+ ld d,a
+ pop bc ;then draw the remaining pixels (c=width-8)
+ ld c,b
+ jr _putsprite
+safeputsprite: ;cal putsprite with de intact
+ psh de
+ cal putsprite
+ pop de
+ ret
+;------------------------------- findpixel ----------------------------------
+;based upon CLEM's fp | 131 cycles | 28 bytes | in:(d,e); out:hla; destr:de
-;------------------------------- sprites --------------------------------------
+findpixel:
+ ld a,e ;a=e=Y
+ add a,a
+ add a,a ;add a,a is 7 cycles faster than add hl,hl
+ ld h,dispbuffer/$400 ;switch to hl (Y<64) & set base to dispbuffer
+PutWhere =$-1 ;screen base position/$400 (where x+y=0)
+ ld l,a ;hl=4*Y
+ ld a,d ;a=d=X
+ rra ;RRA: carry flag must be reset!
+ add hl,hl ;that's what the adds are for :P
+ rra
+ add hl,hl ;hl=16*Y
+ rra ;a=X/8
+ or l
+ ld l,a ;hl=hl+a
+ ld a,d
+ and 7 ;a=X\8
+ cpl
+ rlca
+ rlca
+ rlca
+ ld (FPbit),a
+ xor a
+FPbit =$+1
+ set 0,a
+ ret
-spr_ship:
- .db 7,1 ;ship icon
+;----------------------------------------------------------------------------
+;------------------------------- sprites ------------------------------------
+;----------------------------------------------------------------------------
+
+spr_ship01: ;(normal; up double)
+ .db 7,7 ;ship alpha class (vic viper)
+ .db %11000000 ;██
+ .db %11110000 ;████
+ .db %01111110 ; ██████
+ .db %11101000 ;███ █
+ .db %01111110 ; ██████
+ .db %11110000 ;████
+ .db %11000000 ;██
+spr_ship01i:
+ .db 8,7
+ .db %11001010 ;██ █ █
+ .db %11110101 ;████ █ █
+ .db %01111110 ; ██████
+ .db %11101001 ;███ █ █
+ .db %01111110 ; ██████
+ .db %11110101 ;████ █ █
+ .db %11001010 ;██ █ █
+
+spr_ship02: ;(normal; tail beam)
+ .db 7,7 ;ship gamma class
+ .db %11111000 ;█████
+ .db %01100000 ; ██
+ .db %11111100 ;██████
+ .db %11100110 ;███ ██
+ .db %11111100 ;██████
+ .db %01100000 ; ██
+ .db %11111000 ;█████
+spr_ship02i:
+ .db 8,7
+ .db %11111010 ;█████ █
+ .db %01100001 ; ██ █
+ .db %11111101 ;██████ █
+ .db %11100111 ;███ ███
+ .db %11111101 ;██████ █
+ .db %01100001 ; ██ █
+ .db %11111010 ;█████ █
+
+spr_ship03: ;(hardcore; up double)
+ .db 7,7 ;ship delta class (lord british)
.db %11000000 ; ██
.db %11110000 ; ████
- .db %01111100 ; █████
- .db %01110010 ; ███ █
- .db %01111100 ; █████
+ .db %11111100 ; ██████
+ .db %01100010 ; ██ █
+ .db %11111100 ; ██████
.db %11110000 ; ████
.db %11000000 ; ██
-
-spr_ship01:
- .db 7,7 ;ship alpha class
- .db %01110000 ; ███
- .db %11100000 ; ███
+spr_ship03i:
+ .db 8,7
.db %11111100 ; ██████
.db %11110010 ; ████ █
+ .db %11111101 ; ██████ █
+ .db %01100011 ; ██ ██
+ .db %11111101 ; ██████ █
+ .db %11110010 ; ████ █
.db %11111100 ; ██████
- .db %11100000 ; ███
- .db %01110000 ; ███
-spr_ship02:
- .db 7,7 ;ship beta class
- .db %11000000 ; ██
- .db %11110000 ; ████
- .db %01111100 ; █████
- .db %01110010 ; ███ █
- .db %01111100 ; █████
- .db %11110000 ; ████
- .db %11000000 ; ██
-
-spr_bullet01:
- .db 5,3 ;your bullets
- .db %00110000 ; ░▒▓██
- .db %11111000 ; ░▒▓█████
- .db %00110000 ; ░▒▓██
-spr_bullet02:
- .db 5,3 ;your bullets
- .db %11110000 ; ░▒▓████
- .db %11111000 ; ░▒▓█████
- .db %11110000 ; ░▒▓████
-
-spr_bullet11:
- .db 3,3 ;enemy bullets
- .db %01000000 ; █▓▒░
- .db %11100000 ; ███▓▒░
- .db %01000000 ; █▓▒░
-spr_explosion:
- .db 8,6 ;1
+spr_ship04: ;(hardcore; tail beam)
+ .db 7,7 ;XC1701II ship
+ .db %11110000 ;████
+ .db %10001100 ;█ ██
+ .db %11110010 ;████ █
+ .db %01011110 ; █ ████
+ .db %11110010 ;████ █
+ .db %10001100 ;█ ██
+ .db %11110000 ;████
+spr_ship04i:
+ .db 7,7
+ .db %11110000 ;████
+ .db %10011100 ;█ ███
+ .db %11111110 ;███████
+ .db %01011110 ; █ ████
+ .db %11111110 ;███████
+ .db %10011100 ;█ ███
+ .db %11110000 ;████
+
+auch_bullet = 1 ;damage to you when hit by an enemy bullet
+auch_ground = 5 ;the same when you hit the ground/ceiling
+auch_collide = 4 ;when you hit an enemy
+auch_ecollide = 2*4 ;damage to the enemy that hit you (skip bit 0/1)
+
+spr_multiple:
+ .db 6,6 ;multiples
+ .db %00000000 ;
+ .db %00111000 ; ███
+ .db %01111100 ; █████
+ .db %01111100 ; █████
+ .db %01111100 ; █████
+ .db %00111000 ; ███
+spr_multiple2:
+ .db 7,7 ;multiples
+ .db %00111000 ; ███
+ .db %01111100 ; █████
+ .db %11111110 ;███████
+ .db %11111110 ;███████
+ .db %11111110 ;███████
+ .db %01111100 ; █████
+ .db %00111000 ; ███
+
+;-------------------------------- explosions --------------------------------
+
+spr_hit:
+hitsprites = 5 ;btw: sprites stored backwards
+ .db 5,4 ;5
+ .db %10101000 ;█▒█ █
+ .db %00001000 ;▒ ▒█
+ .db %10000000 ;█ ▒ ▒
+ .db %10101000 ;█▒█▒█
+
+ .db 5,4 ;4
+ .db %01001000 ; █▒▒█
+ .db %11010000 ;██ █▒
+ .db %00101000 ;▒ █ █
+ .db %11010000 ;██▒█
+
+ .db 5,4 ;3
+ .db %00110000 ; ██
+ .db %10011000 ;█ ██
+ .db %10001000 ;█ ▒▒█
+ .db %00110000 ; ▒██
+
+ .db 5,4 ;2
+ .db %00100000 ;▒ █▒
+ .db %00001000 ; ▒▒ █
+ .db %10110000 ;█▒██
+ .db %01000000 ;▒█ ▒
+
+ .db 4,4 ;1
+ .db %10010000 ;█ █
+ .db %01100000 ; ██
+ .db %01100000 ; ██
+ .db %10010000 ;█ █
+
+spr_explosion:
+ .db 8,5 ;1
.db %00000000
- .db %00011100 ; ███
- .db %00111110 ; █████
- .db %01010110 ; █ █ ██
- .db %00111000 ; ███
+ .db %00011100 ; ███
+ .db %00111110 ; █████
+ .db %01010110 ; █ █ ██
+ .db %00111000 ; ███
.db %00000000
.db 8,6 ;2
- .db %00110000 ; ██
- .db %01001110 ; █ ▒███
- .db %10111110 ; █ █████
- .db %01001111 ; █ ▒████
- .db %00111000 ; ███
- .db %00011010 ; ██ █
+ .db %00110000 ; ██
+ .db %01001110 ; █ ▒███
+ .db %10111110 ;█ █████
+ .db %01001111 ; █ ▒████
+ .db %00111000 ; ███
+ .db %00011010 ; ██ █
.db 8,6 ;3
- .db %10110011 ; █ ██ ██
- .db %01001110 ; █ ███
- .db %10110101 ; █ ██▒█▒█
- .db %01000101 ; █ ▒█▒█
- .db %00111110 ; █████
- .db %11011010 ; ██ ██ █
+ .db %10110000 ;█ ██
+ .db %01001110 ; █ ███
+ .db %10110101 ;█ ██▒█▒█
+ .db %01000101 ; █ ▒█▒█
+ .db %00111110 ; █████
+ .db %01011010 ; █ ██ █
.db 8,6 ;4
- .db %00101010 ; ▒ █▒█ █▒
- .db %01000110 ; █ ▒██
- .db %10110101 ; █ ██ █ █
- .db %01100110 ; ██ ██▒
- .db %00111100 ; ████▒
- .db %01011001 ; ���� ██ ▒█
+ .db %00101010 ;▒ █▒█ █
+ .db %01000110 ; █ ▒██
+ .db %10110101 ;█ ██ █ █
+ .db %01100110 ; ██ ██▒
+ .db %00111100 ; ████▒
+ .db %01011001 ; █ ██ ▒█
.db 8,6 ;5
- .db %01000001 ; █▒ ▒ ▒█
- .db %00100101 ; ▒█ █▒█
- .db %00010100 ; ▒ ▒█ █ ▒
- .db %01000100 ; █▒ █
- .db %00010010 ; ▒█▒▒█
- .db %10011010 ; █▒ ██ █▒
+ .db %01000000 ; █▒ ▒ ▒
+ .db %00100101 ; ▒█ █▒█
+ .db %00010100 ;▒ ▒█ █ ▒
+ .db %01000100 ; █▒ █
+ .db %00010010 ; ▒█▒▒█
+ .db %10011010 ;█▒ ██ █▒
.db 8,6 ;6
- .db %01000100 ; █ █ ▒
- .db %00100000 ; ▒█ ▒ ▒
- .db %00000001 ; ▒ ▒ █
- .db %01000100 ; █ █
- .db %00100010 ; █▒ █
- .db %01001000 ; ▒█ ▒█ ▒
+ .db %01000100 ; █ █
+ .db %00100000 ; ▒█ ▒ ▒
+ .db %00000001 ; ▒ ▒ █
+ .db %01000100 ; █ █
+ .db %00100010 ; █▒ █
+ .db %01001000 ;▒█ ▒█ ▒
.db 8,6 ;7
- .db %00001000 ; ▒ █▒
- .db %11000010 ; ██ ▒ █
- .db %00000000 ; ▒
- .db %00100000 ; ▒█ ▒
- .db %00000001 ; ▒ ▒█
- .db %00110000 ; ▒██▒
+ .db %00001000 ; ▒ █▒
+ .db %11000010 ;██ ▒ █
+ .db %00000000 ; ▒
+ .db %00100000 ; ▒█ ▒
+ .db %00000001 ; ▒ ▒█
+ .db %00110000 ; ▒██▒
.db 8,6 ;8
- .db %00000100 ; ▒█
- .db %00000000 ; ▒▒ ▒
- .db %01000000 ; █
- .db %00000000 ; ▒
- .db %00000010 ; █▒
- .db %00100100 ; █▒ █
-
-spr_icon01:
- .db 5,4
- .db %00100000 ; █
- .db %10101000 ; █ █ █
- .db %11111000 ; █████
- .db %01110000 ; ███
-spr_icon02:
- .db 5,4
- .db %00000000 ; ███
- .db %00000000 ; ██ ██
- .db %00000000 ; █ █
- .db %00000000 ;
-
-;---------------------------- texts -------------------------------------------
-
-txt_title: .db "* * NEMESIS * *",0
-txt_level: .db "LEVEL ",0
-txt_score: .db "SCORE",0
-
-;---------------------------- save data ---------------------------------------
-
-stored_data_start:
-
-level .db $00 ;level number
-timer .db $00 ;frame counter
-curevent .dw Leveldata+1 ;next event
-nextevent .db (Leveldata) ;time to next event
-
-score .dw $0000
-
-your_occ .db $00 ;0=normal 1=exploding 2=gone
-lives .dw $0003 ;unused
-x .db $16 ;x-pos
-y .db $46 ;think about it..
-hp .db $00 ;hitpoints left
-
-ybullets .dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ;10 x (state,x,y)
-ebullets .dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ;10 x (state,x,y)
-
-enemies .dw $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000
- .dw $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000
- .dw $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000
- .dw $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000
- .dw $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000
+ .db %00000100 ; ▒█
+ .db %00000000 ;▒▒ ▒
+ .db %01000000 ; █
+ .db %00000000 ; ▒
+ .db %00000010 ; █▒
+ .db %00100100 ; █▒ █
+
+spr_yexplosion:
+ .db 8,5 ;1
+ .db %00000000
+ .db %00101100 ; █ ██
+ .db %00011110 ; ████
+ .db %00110100 ; ██ █
+ .db %00011000 ; ██
+ .db %00000000
-; %111111 (HP left) 11 (00=no enemy 01=exploding 10=normal 11=moving)
-; %111 (move ptrn) 11111 (ship or explosion frame) %11111111 (x) %11111111 (y)
+ .db 8,5 ;2
+ .db %00111000 ; ███
+ .db %01011100 ; █ ███
+ .db %10010111 ;█ █ ███
+ .db %01000110 ; █ ██
+ .db %00111000 ; ███
+ .db %00000000
+ .db 8,6 ;3
+ .db %00111100 ; ████
+ .db %01001111 ; █ ████
+ .db %10100011 ;█ █ ██
+ .db %11000110 ;██ ██
+ .db %01110101 ; ███ █ █
+ .db %00111000 ; ███
-;---------------------------- enemy data --------------------------------------
+ .db 8,6 ;4
+ .db %00110110 ; ██ ██
+ .db %00000101 ; █ █
+ .db %11000001 ;██ █
+ .db %01100001 ; ██ █
+ .db %11000010 ;██ █
+ .db %01010001 ; █ █ █
+
+;--------------------------------- bullets ----------------------------------
+
+bullettable:
+ .db (spr_bullet01-spr_bullet01) ;0
+ .db (spr_bullet02-spr_bullet01) ;4
+ .db (spr_bullet03-spr_bullet01) ;8
+ .db (spr_bullet04-spr_bullet01) ;12
+ .db (spr_bullet05-spr_bullet01) ;16
+ .db (spr_bullet06-spr_bullet01) ;20
+ .db (spr_bullet07-spr_bullet01) ;24
+ .db (spr_bullet08-spr_bullet01) ;28
+ .db (spr_bullet09-spr_bullet01) ;32
+ .db (spr_bullet10-spr_bullet01) ;36
+ .db (spr_bullet11-spr_bullet01) ;40
+ .db (spr_bullet12-spr_bullet01) ;44
+ .db (spr_bullet13-spr_bullet01) ;48
-spr_enemy01:
- .db 6,6 ;enemy type one
- .db %00111100 ; ████
- .db %01110000 ; ███
- .db %11110000 ; ████
+spr_bullet01:
+ .db 2,1
+ .db %11000000 ;▒██
+spr_bullet02:
+ .db 4,1
+ .db %11110000 ;▒████
+spr_bullet03:
+ .db 2,2
+ .db %11000000 ;▒██
+ .db %11000000 ;▒██
+spr_bullet04:
+ .db 4,2
+ .db %10110000 ;▒█▒██
+ .db %10110000 ;▒█▒██
+spr_bullet05:
+ .db 4,3
+ .db %01100000 ; ▒██
+ .db %11110000 ;▒████
+ .db %01100000 ; ▒██
+spr_bullet06:
+ .db 5,3
+ .db %00110000 ; ▒██
+ .db %11111000 ;▒█████
+ .db %00110000 ; ▒██
+spr_bullet07:
+ .db 5,3
+ .db %01110000 ; ▒███
+ .db %11111000 ;▒█████
+ .db %01110000 ; ▒███
+spr_bullet08:
+ .db 5,3
+ .db %11110000 ;▒████
+ .db %11111000 ;▒█████
+ .db %11110000 ;▒████
+spr_bullet09:
+ .db 5,4
+ .db %00010000 ; ▒█
+ .db %10111000 ;▒█▒███
+ .db %01111000 ; ▒████
+ .db %00010000 ; ▒█
+spr_bullet10:
+ .db 6,4
+ .db %00111000 ; ▒███
+ .db %01111100 ; ▒█████
+ .db %11111100 ;▒██████
+ .db %00110000 ; ▒██
+spr_bullet11:
+ .db 7,5
+ .db %00011000 ; ▒██
+ .db %11111100 ;▒██████
+ .db %00111110 ; ▒█████
+ .db %01111100 ; ▒█████
+ .db %00011000 ; ▒██
+spr_bullet12:
+ .db 7,6
+ .db %00110000 ; ▒██
+ .db %11111100 ;▒██████
+ .db %00111110 ; ▒█████
+ .db %01111110 ; ▒██████
+ .db %11111100 ;▒██████
+ .db %00111000 ; ▒███
+spr_bullet13:
+ .db 8,8
+ .db %00111100 ; ▒████
+ .db %11111110 ;▒███████
+ .db %01111111 ; ▒███████
+ .db %00011111 ; ▒█████
+ .db %01111111 ; ▒███████
+ .db %11111110 ;▒███████
+ .db %00111100 ; ▒████
+
+spr_bullett1:
+ .db 4,3 ;▒▒▒
+ .db %11100000 ;▒███
.db %11110000 ; ████
.db %01110000 ; ███
- .db %00111100 ; ████
-spr_enemy02:
- .db 6,6 ;enemy type two
- .db %00111000 ; ███
- .db %01100000 ; ██
- .db %11111100 ; ██████
- .db %11111100 ; ██████
- .db %01100000 ; ██
- .db %00111000 ; ███
-spr_enemy03:
- .db 6,6 ;enemy type three
- .db %01111100 ; █████
- .db %11110000 ; ████
- .db %11111000 ; █████
- .db %11111000 ; █████
- .db %11110000 ; ████
- .db %01111100 ; █████
-spr_enemy04:
- .db 6,6 ;enemy type four
- .db %00111000 ; ███
- .db %01111100 ; █████
- .db %11111000 ; █████
- .db %11111000 ; █████
- .db %01111100 ; █████
- .db %00111000 ; ███
-
-enemy01:
- .db %00000010,%00000000 ;first two enemy bytes
-enemy02:
- .db %00000010,%00100001
-enemy03:
- .db %00000110,%00000010
-enemy04:
- .db %00010010,%00000010
-
-;---------------------------- level data --------------------------------------
-
-Leveldata:
- .db $01,$01,$40 ;$time (ff=end) $type $y-pos
- .db $10,$00,$30
- .db $10,$02,$20
- .db $40,$01,$10
- .db $01,$00,$44
- .db $15,$01,$31
- .db $04,$02,$38
- .db $05,$00,$40
- .db $03,$00,$2f
- .db $04,$00,$3a
- .db $12,$02,$10
- .db $10,$03,$18
- .db $0e,$03,$20
- .db $0c,$03,$28
- .db $0a,$02,$30
- .db $08,$02,$38
- .db $06,$01,$40
- .db $04,$00,$48
- .db $2a,$00,$20
- .db $ff,$ff,$ff
-
-;----------------------------- end --------------------------------------------
+
+spr_bullete1:
+ .db 4,3 ;enemy bullets
+ .db %01100000 ; ██▒
+ .db %11110000 ;████▒
+ .db %01100000 ; ██▒
+
+;format:[min.damage] [dam.inc] [000:direction 00000:speed] [offset]
+;damage = min.damage + dam.inc*incs (0<=incs<=6)
+;speed in pixels/frame (>=%10010=forward; <=%01110=backwards)
+;direction: 001=straight forward; 010=up; 011=1/2up; 100=down; 101=1/2down
+; 111=laser (speed=duration 00010-00000)
+
+weapondata: ;max = 9x6; 15x5; 21x4; 27x3
+ .db 2,1,%00110010,3,%00000000,0,%00000000,0 ;1 single
+ .db 3,1,%00110011,3,%00000000,0,%00000000,0 ;2 fast
+ .db 2,1,%00110010,0,%00110010,6,%00000000,0 ;3 double
+ .db 2,1,%01110010,2,%10010010,2,%00110010,2 ;4 triple
+ .db 3,2,%00110011,2,%10010010,2,%01110010,2 ;5
+ .db 4,2,%01110011,2,%10010011,2,%00110011,2 ;6
+ .db 5,3,%01110100,2,%10010100,2,%00110100,2 ;7
+ .db 7,4,%01110101,2,%10010101,2,%00110101,2 ;8
+ .db 9,6,%01110110,2,%10010110,2,%00110110,2 ;9
+maxweapon = 9
+ .db 1,1,%11100100,3,%00000000,0,%00000000,0 ;1 single (1x1x3)
+ .db 2,3,%11100011,3,%00000000,0,%00000000,0 ;2 short (2x1x2)
+ .db 1,2,%11100100,3,%11100000,4,%00000000,0 ;3 fat (1x2x3)
+ .db 1,2,%11100101,0,%11100000,6,%00000000,0 ;4 double (1x2x4)
+ .db 4,4,%11100011,3,%00000000,0,%00000000,0 ;5 short (4x1x2)
+ .db 1,2,%11100100,3,%11100000,6,%11100000,0 ;6 triple (1x3x3)
+ .db 1,3,%11101000,3,%11100000,6,%11100000,0 ;7 triple long (1x3x7)
+ .db 2,5,%11100101,2,%11100000,4,%00000000,0 ;8 double (2x2x4)
+ .db 1,8,%11101011,3,%11100000,2,%11100000,4 ;9 big fat long (1x3x10)
+maxlaser = 18
+tailbeam = %00101101 ;180 degrees
+doublebeam = %01010010 ;45 degrees
+extrabulletpos:
+ .db 3 ;tail/double yposition
+
+;------------------------------------ bar -----------------------------------
+
+spr_lship:
+ .db 5,3 ;li'l ship indicating lives left
+ .db %11100000 ;███
+ .db %01111000 ; ████
+ .db %11100000 ;███
+lshipsize = 5 ;space between two ship icons
+
+spr_icon:
+ .db 16,7 ;selected.......:.......:
+ .db %11111111 ;████████████████
+ .db %11000000 ;██ █
+ .db %11000000 ;██ █
+ .db %11000000 ;██ █
+ .db %11000000 ;██ █
+ .db %11000000 ;██ █
+ .db %11111111 ;████████████████
+ .db 7
+ .db %11111111
+ .db %00000001
+ .db %00000001
+ .db %00000001
+ .db %00000001
+ .db %00000001
+ .db %11111111
+spr_icon00:
+ .db 16,7 ;unused .......:.......:
+ .db %10101010 ;█ █ █ █ █ █ █ █
+ .db %11010101 ;██ █ █ █ █ █ █ █
+ .db %10101010 ;█ █ █ █ █ █ █ █
+ .db %11010101 ;██ █ █ █ █ █ █ █
+ .db %10101010 ;█ █ █ █ █ █ █ █
+ .db %11010101 ;██ █ █ █ █ █ █ █
+ .db %10101010 ;█ █ █ █ █ █ █ █
+ .db 7
+ .db %10101010
+ .db %01010101
+ .db %10101010
+ .db %01010101
+ .db %10101010
+ .db %01010101
+ .db %10101010
+spr_icon01:
+ .db 16,7 ;shield .......:.......:
+ .db %10001111 ;█ ███████ █ ▒
+ .db %10011001 ;█ ██ █████ █ ▒
+ .db %10111100 ;█ ████ ████ █ ▒
+ .db %10111000 ;█ ███ █ ██ █ ▒
+ .db %10111100 ;█ ████ ████ █ ▒
+ .db %10011001 ;█ ██ █████ █ ▒
+ .db %10001111 ;█ ███████ █ ▒
+ .db 7
+ .db %11100100
+ .db %11110010
+ .db %01111010
+ .db %10011010
+ .db %01111010
+ .db %11110010
+ .db %11100100
+maxarmor = 63 ;maximum HPs you can get
+spr_icon02a:
+ .db 16,7 ;tailbeam.......:.......:
+ .db %10000000 ;█ ▒
+ .db %10000011 ;█ ██ ▒
+ .db %10000001 ;█ ███ ▒
+ .db %10111011 ;█ ███ ███ ██ ██▒
+ .db %10000001 ;█ ███ ▒
+ .db %10000011 ;█ ██ ▒
+ .db %10000000 ;█ ▒
+ .db 5
+ .db %00000000
+ .db %00000000
+ .db %11000000
+ .db %10110011
+ .db %11000000
+spr_icon02b:
+ .db 16,7 ;updouble.......:.......:
+ .db %10000000 ;█ ██ ▒
+ .db %10000000 ;█ ██ ▒
+ .db %10110000 ;█ ██ ██ ▒
+ .db %10011100 ;█ ███ ▒
+ .db %10111011 ;█ ███ ██ ████ ▒
+ .db %10011100 ;█ ███ ▒
+ .db %10110000 ;█ ██ ▒
+ .db 5
+ .db %00011000
+ .db %00110000
+ .db %01100000
+ .db %00000000
+ .db %00011110
+spr_icon03:
+ .db 11,7 ;bullets .......:.......:
+ .db %10000000 ;█ ██ ▒
+ .db %10000011 ;█ █████ ▒▒▒ ▒
+ .db %10011000 ;█ ██ ██ ▒▒▒ ▒
+ .db %11111100 ;██████ ▒▒▒ ▒
+ .db %10011000 ;█ ██ ██ ▒▒▒ ▒
+ .db %10000011 ;█ █████ ▒▒▒ ▒
+ .db %10000000 ;█ ██ ▒
+ .db 7
+ .db %11000000
+ .db %11100000
+ .db %11000000
+ .db %00000000
+ .db %11000000
+ .db %11100000
+ .db %11000000
+spr_icon04:
+ .db 16,7 ;laser .......:.......:
+ .db %10000000 ;█ ▒
+ .db %10001010 ;█ █ █ ▒▒▒ ▒
+ .db %11101100 ;███ ██ ▒▒▒ ▒
+ .db %11110111 ;████ ███████▒▒▒█▒
+ .db %11101100 ;███ ██ ▒▒▒ ▒
+ .db %10001010 ;█ █ █ ▒▒▒ ▒
+ .db %10000000 ;█ ▒
+ .db 4
+ .db %00000000
+ .db %00000000
+ .db %00000000
+ .db %11111111
+spr_icon05:
+ .db 16,7 ;multiple.......:.......:
+ .db %10000011 ;█ ███ ▒
+ .db %10000001 ;█ ████ ██ ▒
+ .db %10000001 ;█ ████ ▒
+ .db %10000011 ;█ ███ ▒
+ .db %10011000 ;█ ██ ▒
+ .db %10111100 ;█ ████ ██ ██▒
+ .db %10011000 ;█ ██ ▒
+ .db 6
+ .db %10000000
+ .db %11100110
+ .db %11100000
+ .db %10000000
+ .db %00000000
+ .db %11000011
+spr_dividerline:
+ .db 8,7
+ .db 128,128,128,128,128,128,128 ;128 = %10000000
+
+;---------------------------- texts -----------------------------------------
+
+txt_email: .db "www.shiar.org ",127 ;title screen
+ .db " shiar0@hotmail.com",0
+_txt_email = $3A01 ;$3A1E=just email
+txt_about: .db "v0.99.99 ",127," by Shiar",0 ;right behind txt_email
+_txt_about = $3321
+txt_menu1: .db "NEW GAME",0
+txt_menu2: .db "CONTINUE",0
+
+txt_difhardcore:.db "Hardcore!",0
+txt_difnormal: .db "Normal",0
+txt_updouble: .db "Up Double",0
+txt_tailbeam: .db "Tail Beam",0
+
+txt_level: .db "LEVEL ",0 ;new level screen
+txt_lives: .db "Lx0",0
+txt_savekey: .db "Press [F1] to save",0
+
+txt_gameover: .db "GAME OVER!",0 ;game over screen
+txt_score: .db "Score",0
+txt_hiscore: .db "Hiscore",0
+
+txt_pause: .db " ",6,"/",7," ",$1C,"contrast; "
+ .db "F1",$1C,"B",$CF,5,"W Mode",0
+_txt_pause = $020B
+txt_pressenter: .db "Enter to continue",0 ;pause
+_txt_pressenter = $0201
+#ifdef teacherkey
+txt_teacher: .db "(2",Lpi,"*.98)/sin 13",0 ;teacher
+txt_teacherans: .db Lneg,"14.6549373495",0
+#endif
+
+;---------------------------- save data -------------------------------------
+
+storehi_start:
+hiscore .dw 0 ;default hiscore
+hiname .db "shiar.99",0 ; " " name
+storehi_end:
+
+invertmode: cpl ;/or a ;saves B<>W mode setting cpl
+
+storesave_start: ;--SAVED GAME-- defs:
+your_ship .dw spr_ship01 ;your sprite (^invertmode^) sprs1
+level .db 1 ;level number 1
+levelp .dw level00 ;pointer to level data lev00
+pickuptimer .db 4 ;counts when to place a pickup 4
+your_extramode .db 1 ;you have tail or double 1
+your_score .dw 0 ;current score 0
+your_pickup .db 0 ;pickups already picked up 0
+your_occ .db 0 ;0=normal 1..16=exploding 0
+your_shield .db 0 ;invincibility left 0
+your_armor .db 24 ;HP left 24
+your_lives .db 3 ;lives left 3
+your_weapon .db 17 ;current weapon upgrade 0
+your_multiples .db 0 ;multiples present 0
+your_extra .db 0 ;extra beam present 0
+hardcore .db 0 ;hardcore mode if non-0 0
+storesave_end:
+
+time2invert: .db 0 ;time until b<>w switch (0 at startup)
+
+;------------------------------ levels data ---------------------------------
+
+;format:boss: [moveType] [enemyType]
+; @level: [nr.dif.enemies]x [enemy nr]
+; [min. enemy frequency] [enemy frequency max.inc]
+; [next lvl (=nrenemies+4)] [level_info: 000000 1:ceiling 1:ground]
+; [tunnel size] [groundtype] [stars1] [stars2]
+;efrequency must be odd if halfluring!
+
+ .db 0 ;storyline ID
+levelstart: ;[y-pos] [x-pos] [text,0] [SFX lines; 0=more text] [-1=end]
+ .db 25,33,"Imperial ships have",0,0
+ .db 31,9,"been sent to intercept you",0,31-25+6,-1
+
+ .db 30
+level00:.db 5,3,5,3,2,2
+ .db 28,73,13
+ .db %00,0,1,1
+
+ .db 31 ;boss for level01
+level01:.db 2,3,5 ;enemies
+ .db 26,70,20
+ .db %00,0,1,1
+
+ .db 32
+level02:.db 3,3,4,5
+ .db 20,60,60
+ .db %00,0,1,1
+
+ .db 33
+level03:.db 4,4,5,6,7
+ .db 17,40,75
+ .db %00,0,1,1
+
+ .db 0
+ .db 1,1,"Long-Range scanners are ",
+ .db "showing",0,0
+ .db 8,1,"lots of enemy vessels ",
+ .db "advancing fast.",0,8-1+6
+ .db 24,1,"I'm changing course to a",
+ .db " nearby ",0,0
+ .db 31,1,"asteroid belt and try to",0,0
+ .db 38,1,"lose them inthere.",0,38-24+6,-1
+
+;---- approaching asteroid belt
+ .db 34
+level04:.db 5,8,8,9,11,12
+ .db 17,27,70
+ .db %00,0,1,1
+
+;---- inside
+ .db 35
+level05:.db 7,10,11,9,11,12,12,14
+ .db 12,24,80
+ .db %00,0,1,1
+
+ .db 36
+level06:.db 10,10,11,12,12,14,13,13,14,15,15
+ .db 7,18,180
+ .db %00,0,1,1
+
+;out
+ .db 37
+level07:.db 4,16,17,18,6
+ .db 22,29,62
+ .db %00,0,1,1 ;-1=%11111111=line
+
+ .db 38
+level08:.db 5,16,17,18,19,19
+ .db 20,38,57
+ .db %00,0,1,1
+
+ .db 39
+level09:.db 3,19,20,21
+ .db 19,63,57
+ .db %00,0,1,1
+
+ .db 40
+level10:.db 7,22,23,24,24,24,25,26
+ .db 20,22,63
+ .db %00,0,1,1
+
+;endlevel
+ .db 41
+level11:.db 1,26
+ .db 20,20,80
+ .db %00,0,1,1
+
+ .db 0,1,1,"That`s all folks...",0,0
+ .db 20,50,"for now...",0,20-0+6,-1
+
+endlevel = 12
+
+pickupfreq = 19
+
+;------------------------------ enemies -------------------------------------
+
+;format: [HP64] [000000:HP 00:occ] [sprite] [xpos] [appearance(ypos)]
+; [movetype] [time2fire] [firefreq] [firetype]
+;occ: 00=no enemy; 01=exploding (sprite=frame); 10=pickup; 11=enemy
+;appearances: 1=random; 2=lure; 3=halflure
+;movetypes: 1=updown; 2=1/4x; 3=1/2x; 4=3/4x; 5=3/2x; 6=2x; 7=ylure50%;
+; 8=ylure; 9=ylure50%; 10=x+y-lure 50%; 11=-1/2x; 12=-1x
+;firetypes: 1=normal; 6=aiming; 7=triple; 8=double; 9=quad; 10=dquad; 11=ran
+
+enemyspecs: ;10 bytes/enemy | max.enemies <64 | sprites use <768 bytes
+;0-1=pickups
+ .db 0,%00000010,spr_enemyP1&255,spr_enemyP1/256,128,2,03, 0, 0,1 ;pickup
+ .db 0,%00000110,spr_enemyP2&255,spr_enemyP2/256,128,2,03, 0, 0,1 ;bigpickup
+;2-7=basic enemies , , , , , , , ,
+ .db 0,%00001011,spr_enemyE0&255,spr_enemyE0/256,128,1,00,12, 0,1 ;intro
+ .db 0,%00100011,spr_enemyE1&255,spr_enemyE1/256,128,1,00,10, 0,1 ;weak
+ .db 0,%01100011,spr_enemyE4&255,spr_enemyE4/256,128,1,03, 6,50,1 ;slow
+ .db 0,%01001011,spr_enemyE2&255,spr_enemyE2/256,128,1,00, 1, 0,1
+ .db 0,%01011011,spr_enemyE3&255,spr_enemyE3/256,128,3,00,19,39,8 ;heavy
+ .db 0,%01010011,spr_enemyE5&255,spr_enemyE5/256,128,3,05, 1, 0,1 ;fast
+;8-10=backwards enemies, , , , , , , ,
+ .db 0,%00111011,spr_enemyB1&255,spr_enemyB1/256,000,3,11,19,92,1
+ .db 0,%01011011,spr_enemyB2&255,spr_enemyB2/256,000,1,12,11,45,1
+ .db 0,%01101011,spr_enemyB3&255,spr_enemyB3/256,000,1,11,10,41,8 ;small
+;11-15=asteroid , , , , , , , ,
+ .db 0,%01001011,spr_enemyA1&255,spr_enemyA1/256,128,1,04, 0, 0,1
+ .db 0,%01111011,spr_enemyA2&255,spr_enemyA2/256,128,1,00, 0, 0,1
+ .db 0,%10110011,spr_enemyA3&255,spr_enemyA3/256,128,1,05, 0, 0,1
+ .db 1,%00010011,spr_enemyA4&255,spr_enemyA4/256,128,1,03, 0, 0,1 ;slow+hard
+ .db 0,%01111011,spr_enemyA4&255,spr_enemyA4/256,128,1,06, 0, 0,1
+;16-21=improved enemies, , , , , , , ,
+ .db 0,%10010011,spr_enemyG1&255,spr_enemyG1/256,128,3,00, 3,40,1
+ .db 0,%10111011,spr_enemyG2&255,spr_enemyG2/256,128,3,00, 1,36,1
+ .db 0,%01100011,spr_enemyG5&255,spr_enemyG5/256,128,1,01, 9,52,1 ;updown
+ .db 0,%11110011,spr_enemyG3&255,spr_enemyG3/256,128,3,04, 7,99,7 ;3x
+ .db 1,%01101011,spr_enemyG4&255,spr_enemyG4/256,128,2,01,17, 0,7 ;updown3x
+ .db 1,%00010011,spr_enemyG6&255,spr_enemyG6/256,128,2,07,62,60,8 ;lure
+;22-26=hi-speed , , , , , , , ,
+ .db 1,%00010011,spr_enemyS2&255,spr_enemyS2/256,128,2,05, 3,32,8 ;fast
+ .db 0,%11111011,spr_enemyS1&255,spr_enemyS1/256,128,3,07, 2,28,1 ;lure
+ .db 1,%00101011,spr_enemyS4&255,spr_enemyS4/256,128,3,06, 0, 0,1 ;vfast+nofire
+ .db 1,%01110011,spr_enemyS3&255,spr_enemyS3/256,128,1,07, 1,20,8 ;lure
+ .db 0,%11011011,spr_enemyS2&255,spr_enemyS2/256,128,2,01, 3,7,11 ;updown+ran
+;27-28=unused, , , , , , , , ,
+ .db 0,%00000011,spr_enemy00&255,spr_enemy00/256,128,2,03, 0, 0,1 ;27
+ .db 0,%00000011,spr_enemy00&255,spr_enemy00/256,128,2,03, 0, 0,1 ;28
+;29=final boss' enemy
+ .db 0,%11110011,spr_enemyM1&255,spr_enemyM1/256,128,3,01, 0, 0,1 ;lure
+bossenemy = 29
+;30-34=first bosses , , , , , , , ,
+ .db 2,%01000111,spr_boss01 &255,spr_boss01 /256,127,1,09,35,50,7 ;triple
+ .db 2,%01010011,spr_boss02 &255,spr_boss02 /256,127,1,09,20,12,1 ;small
+ .db 2,%01111011,spr_boss03 &255,spr_boss03 /256,127,1,09,15,11,8 ;normal
+ .db 2,%10011111,spr_boss04 &255,spr_boss04 /256,127,3,10,10,11,1 ;moving
+ .db 1,%11111011,spr_boss05 &255,spr_boss05 /256,127,2,10, 1, 4,1 ;weak+rapidfire
+;35-36=asteroid bosses , , , , , , , ,
+ .db 4,%00010111,spr_bossA1 &255,spr_bossA1 /256,127,1,10,36,14,6
+ .db 4,%01101111,spr_bossA1 &255,spr_bossA1 /256,127,2,10,28,12,6
+;37-41=big bosses , , , , , , , ,
+ .db 4,%00010111,spr_boss07 &255,spr_boss07 /256,127,3,08,31, 8,7
+ .db 5,%00101011,spr_boss06 &255,spr_boss06 /256,127,3,08,13, 7,7
+ .db 6,%10001111,spr_boss08 &255,spr_boss08 /256,127,1,08,18, 8,9 ;quad
+ .db 7,%00101011,spr_boss09 &255,spr_boss09 /256,127,1,08,21, 9,10 ;6x
+ .db 9,%11011011,spr_boss09 &255,spr_boss09 /256,127,1,08,12,11,12 ;enemies
+
+spr_enemy00:
+spr_enemyP1:
+ .db 10,8 ;pickup
+ .db %00111111 ; ██████
+ .db %01100001 ; ██ ██
+ .db %10001100 ;█ ██ █
+ .db %10111111 ;█ ██████ █
+ .db %10111111 ;█ ██████ █
+ .db %10001100 ;█ ██ █
+ .db %01100001 ; ██ ██
+ .db %00111111 ; ██████
+ .db 7
+ .db %00000000
+ .db %10000000
+ .db %01000000
+ .db %01000000
+ .db %01000000
+ .db %01000000
+ .db %10000000
+spr_enemyP2:
+ .db 11,9 ;big pickup
+ .db %00111111 ; ███████
+ .db %01100000 ; ██ ██
+ .db %10001110 ;█ ███ █
+ .db %10111011 ;█ ███ ███ █
+ .db %10100000 ;█ █ █ █
+ .db %10111011 ;█ ███ ███ █
+ .db %10001110 ;█ ███ █
+ .db %01100000 ; ██ ██
+ .db %00111111 ; ███████
+ .db 9
+ .db %10000000
+ .db %11000000
+ .db %00100000
+ .db %10100000
+ .db %10100000
+ .db %10100000
+ .db %00100000
+ .db %11000000
+ .db %10000000
+
+spr_enemyE0:
+ .db 6,7 ;weak
+ .db %00011100 ; ███
+ .db %00100100 ; █ █
+ .db %01101000 ; ██ █
+ .db %10110100 ;█ ██ █
+ .db %01101000 ; ██ █
+ .db %00100100 ; █ █
+ .db %00011100 ; ███
+spr_enemyE1:
+ .db 6,7 ;weak
+ .db %00111100 ; ████
+ .db %01000100 ; █ █
+ .db %10111000 ;█ ███
+ .db %11100000 ;███
+ .db %10111000 ;█ ███
+ .db %01000100 ; █ █
+ .db %00111100 ; ████
+spr_enemyE2:
+ .db 6,6 ;weak
+ .db %00111100 ; ████
+ .db %01010000 ; █ █
+ .db %10100000 ;█ █
+ .db %10100000 ;█ █
+ .db %01010000 ; █ █
+ .db %00111100 ; ████
+spr_enemyE3:
+ .db 6,6 ;normal solid (Galaxian enemy)
+ .db %00111100 ; ████
+ .db %01010000 ; █ █
+ .db %11010000 ;██ █
+ .db %11010000 ;██ █
+ .db %01010000 ; █ █
+ .db %00111100 ; ████
+spr_enemyE4:
+ .db 6,7
+ .db %00011100 ; ███
+ .db %01101000 ; ██ █
+ .db %10011000 ;█ ██
+ .db %01110000 ; ███
+ .db %10011000 ;█ ██
+ .db %01101000 ; ██ █
+ .db %00011100 ; ███
+spr_enemyE5:
+ .db 6,6 ;speedy
+ .db %00010100 ; █ █
+ .db %01111000 ; ████
+ .db %10100000 ;█ █
+ .db %10100000 ;█ █
+ .db %01111000 ; ████
+ .db %00010100 ; █ █
+
+spr_enemyB1:
+ .db 6,6 ;solid backwards
+ .db %11110000 ;████
+ .db %00101000 ; █ █
+ .db %01010100 ; █ █ █
+ .db %01010100 ; █ █ █
+ .db %00101000 ; █ █
+ .db %11110000 ;████
+spr_enemyB2:
+ .db 6,7
+ .db %11110000 ;████
+ .db %01001000 ; █ █
+ .db %01110100 ; ███ █
+ .db %00100100 ; █ █
+ .db %01110100 ; ███ █
+ .db %01001000 ; █ █
+ .db %11110000 ;████
+spr_enemyB3:
+ .db 5,7
+ .db %11100000 ;███
+ .db %01010000 ; █ █
+ .db %01111000 ; ████
+ .db %01000000 ; █
+ .db %01111000 ; ████
+ .db %01010000 ; █ █
+ .db %11100000 ;███
+
+spr_enemyA1:
+ .db 7,6 ;asteroid one
+ .db %00011000 ; ██
+ .db %01101100 ; ██ ██
+ .db %10011110 ;█ ████
+ .db %11111010 ;█████ █
+ .db %10111100 ;█ ████
+ .db %01110000 ; ███
+spr_enemyA2:
+ .db 8,7 ;asteroid two
+ .db %00111100 ; ████
+ .db %01011010 ; █ ██ █
+ .db %01101101 ; ██ ██ █
+ .db %11111101 ;██████ █
+ .db %11111111 ;████████
+ .db %10110110 ;█ ██ ██
+ .db %01100000 ; ██
+spr_enemyA3:
+ .db 8,8 ;asteroid three
+ .db %00011110 ; ████
+ .db %01110011 ; ███ ██
+ .db %01111101 ; █████ █
+ .db %10110111 ;█ ██ ███
+ .db %11111110 ;███████
+ .db %11111101 ;██████ █
+ .db %01010111 ; █ █ ███
+ .db %00001110 ; ███
+spr_enemyA4:
+ .db 7,6 ;asteroid four
+ .db %01111000 ; ████
+ .db %10110110 ;█ ██ ██
+ .db %11111101 ;██████ █
+ .db %01111011 ; ████ ██
+ .db %01001110 ; █ ███
+ .db %00110000 ; ██
+
+spr_enemyG1:
+ .db 8,6 ;G-Type
+ .db %00011111 ; █████
+ .db %01001000 ; █ █
+ .db %10110100 ;█ ██ █
+ .db %10110100 ;█ ██ █
+ .db %01001000 ; █ █
+ .db %00011111 ; █████
+spr_enemyG2:
+ .db 8,6 ;smaller nacelles
+ .db %00010111 ; █ ███
+ .db %01101100 ; ██ ██
+ .db %10110100 ;█ ██ █
+ .db %10110100 ;█ ██ █
+ .db %01101100 ; ██ ██
+ .db %00010111 ; █ ███
+spr_enemyG3:
+ .db 8,6 ;shuttle
+ .db %00001111 ; ████
+ .db %01110100 ; ███ █
+ .db %10011100 ;█ ███
+ .db %10011100 ;█ ███
+ .db %01110100 ; ███ █
+ .db %00001111 ; ████
+spr_enemyG4:
+ .db 8,6 ;G-Type solid
+ .db %00111101 ; ███ █
+ .db %01111000 ; ████
+ .db %11110100 ;████ █
+ .db %11110100 ;████ █
+ .db %01111000 ; ████
+ .db %00111101 ; ███ █
+spr_enemyG5:
+ .db 6,6
+ .db %01111100 ; █████
+ .db %10110000 ;█ ██
+ .db %10101000 ;█ █ █
+ .db %10101000 ;█ █ █
+ .db %10110000 ;█ ██
+ .db %01111100 ; █████
+spr_enemyG6:
+ .db 8,5 ;shuttle
+ .db %00001111 ; ████
+ .db %01110100 ; ███ █
+ .db %10011010 ;█ ██ █
+ .db %01110100 ; ███ █
+ .db %00001111 ; ████
+
+spr_enemyS1:
+ .db 6,6 ;solid
+ .db %00111000 ; ███
+ .db %01111100 ; █████
+ .db %11111000 ; █████
+ .db %11111000 ; █████
+ .db %01111100 ; █████
+ .db %00111000 ; ███
+spr_enemyS2:
+ .db 7,6 ;some attack vessel
+ .db %00011100 ; ███
+ .db %01110010 ; ███ █
+ .db %10101100 ; █ █ ██
+ .db %10101100 ; █ █ ██
+ .db %01110010 ; ███ █
+ .db %00011100 ; ███
+spr_enemyS3:
+ .db 7,6 ;interceptor
+ .db %00011110 ; ████
+ .db %01111110 ; ██████
+ .db %11111100 ; ██████
+ .db %11111100 ; ██████
+ .db %01111110 ; ██████
+ .db %00011110 ; ████
+spr_enemyS4:
+ .db 8,6 ;cheap intercept
+ .db %00011011 ; ██ ██
+ .db %01110110 ; ███ ██
+ .db %10111100 ; █ ████
+ .db %10111100 ; █ ████
+ .db %01110110 ; ███ ██
+ .db %00011011 ; ██ ██
+
+spr_enemyN1:
+ .db 8,7 ;some cool Nemesis-MSX enemy
+ .db %00111110 ; █████
+ .db %11110001 ;████ █
+ .db %00001110 ; ███
+ .db %00010101 ; █ █ █
+ .db %00001110 ; ███
+ .db %11110001 ;████ █
+ .db %00111110 ; █████
+spr_enemyN2:
+ .db 8,7 ;
+ .db %00111110 ; █████
+ .db %00011101 ; ███ █
+ .db %11111111 ;████ ███
+ .db %01110110 ; ██ ███
+ .db %11111111 ;████ ███
+ .db %00011101 ; ███ █
+ .db %00111110 ; █████
+spr_enemyN3:
+ .db 8,7 ;Nem3MSX jumper lvl#3
+ .db %10111110 ;█ █████
+ .db %01011101 ; █ ███ █
+ .db %01111110 ; ██████
+ .db %00010100 ; █ █
+ .db %01111110 ; ██████
+ .db %01011101 ; █ ███ █
+ .db %10111110 ;█ █████
+spr_enemyN4:
+ .db 8,8 ;Stolen from XC1701II
+ .db %01111110 ; ██████
+ .db %11110101 ;████ █ █
+ .db %00011111 ; █████
+ .db %00111101 ; ████ █
+ .db %00111001 ; ███ █
+ .db %00011111 ; █████
+ .db %11110101 ;████ █ █
+ .db %01111110 ; ██████
+spr_enemyN5:
+ .db 7,8 ;Stolen from XC1701II
+ .db %00111100 ; ████
+ .db %01010010 ; █ █ █
+ .db %11111110 ;███████
+ .db %01001010 ; █ █ █
+ .db %01011010 ; █ ██ █
+ .db %11111110 ;███████
+ .db %01010010 ; █ █ █
+ .db %01111100 ; ████
+
+spr_enemyM1:
+ .db 8,7 ;mine
+ .db %00111100 ; ████
+ .db %01011010 ; █ ██ █
+ .db %11111111 ;████████
+ .db %01001010 ; █ █ █
+ .db %11111111 ;████████
+ .db %01011010 ; █ ██ █
+ .db %00111100 ; ████
+
+spr_boss01:
+ .db 9,12 ;.......:.2.....:
+ .db %00000111 ; ████
+ .db %00011100 ; ███
+ .db %00101010 ; █ █ █
+ .db %01011011 ; █ ██ ██
+ .db %10100110 ;█ █ ██ █
+ .db %11010101 ;██ █ █ █
+ .db %11010101 ;██ █ █ █
+ .db %10100110 ;█ █ ██ █
+ .db %01011011 ; █ ██ ██
+ .db %00101010 ; █ █ █
+ .db %00011100 ; ███
+ .db %00000111 ; ████
+ .db 12
+ .db %10000000
+ .db %00000000
+ .db %00000000
+ .db %00000000
+ .db %10000000
+ .db %00000000 ;...what a waste of space...
+ .db %00000000
+ .db %10000000
+ .db %00000000
+ .db %00000000
+ .db %00000000
+ .db %10000000
+spr_boss02:
+ .db 12,12 ;.......:....5..:
+ .db %00011110 ; ████
+ .db %01100001 ; ██ ██
+ .db %10110010 ;█ ██ █ ██
+ .db %00000101 ; █ ██ █
+ .db %00001010 ; █ █ ██
+ .db %00011010 ; ██ █ █ █
+ .db %00011010 ; ██ █ █ █
+ .db %00001010 ; █ █ ██
+ .db %00000101 ; █ ██ █
+ .db %10110010 ;█ ██ █ ██
+ .db %01100001 ; ██ ██
+ .db %00011110 ; ████
+ .db 11
+ .db %00000000
+ .db %10000000
+ .db %01100000
+ .db %10100000
+ .db %01100000
+ .db %10010000
+ .db %10010000
+ .db %01100000
+ .db %10100000
+ .db %01100000
+ .db %10000000
+spr_boss03:
+ .db 16,10 ;.......:.......:
+ .db %00000001 ; ██████ ██
+ .db %00001110 ; ███ █ ███
+ .db %00110010 ; ██ █ ████
+ .db %01001101 ; █ ██ ██
+ .db %11101011 ;███ █ ██ █
+ .db %11101011 ;███ █ ██ █
+ .db %01001101 ; █ ██ ██
+ .db %00110010 ; ██ █ ████
+ .db %00001110 ; ███ █ ███
+ .db %00000001 ; ██████ ██
+ .db 10
+ .db %11111011
+ .db %00101110
+ .db %11110000
+ .db %10000000
+ .db %01000000
+ .db %01000000
+ .db %10000000
+ .db %11110000
+ .db %00101110
+ .db %11111011
+spr_boss04:
+ .db 16,10 ;.......:.......:
+ .db %00000000 ; █████
+ .db %00000000 ; ███ █
+ .db %00000111 ; ████ █████
+ .db %00111101 ; ████ █ █ ████
+ .db %01001010 ; █ █ █ ██ ███ █
+ .db %10110110 ;█ ██ ██ ███ █ █
+ .db %10110110 ;█ ██ ██ ███ █ █
+ .db %01001010 ; █ █ █ ██ ███ █
+ .db %00111101 ; ████ █ █ ████
+ .db %00000111 ; ████ █████
+ .db 12 ; ███ █
+ .db %00011111 ; █████
+ .db %11100001
+ .db %10111110
+ .db %01011110
+ .db %11011101
+ .db %11100101
+ .db %11100101
+ .db %11011101
+ .db %01011110
+ .db %10111110
+ .db %11100001
+ .db %00011111
+spr_boss05:
+ .db 16,10 ;.......:.......:
+ .db %11111110 ;███████
+ .db %00000011 ; ███ ████
+ .db %00110101 ; ██ █ ████ █
+ .db %01111010 ; ████ █ █ █ ██
+ .db %10001101 ;█ ██ █ ██ ██ █
+ .db %10001101 ;█ ██ █ ██ ██ █
+ .db %01111010 ; ████ █ █ █ ██
+ .db %00110101 ; ██ █ ████ █
+ .db %00000011 ; ███ ████
+ .db %11111110 ;███████
+ .db 9
+ .db %00000000
+ .db %10001111
+ .db %11100001
+ .db %10010110
+ .db %01101101
+ .db %01101101
+ .db %10010110
+ .db %11100001
+ .db %10001111
+spr_bossA1:
+ .db 12,11 ;AsteroidBoss one
+ .db %00011110 ; ████
+ .db %01110011 ; ███ ███
+ .db %01111111 ; ███████ █
+ .db %01111111 ; █████████
+ .db %11111110 ;███████ ███
+ .db %11111111 ;███████████
+ .db %11111111 ;████████████
+ .db %10111110 ;█ █████ ████
+ .db %01011111 ; █ ███████
+ .db %00110111 ; ██ ███
+ .db %00001110 ; ███
+ .db 9
+ .db %00000000
+ .db %10000000
+ .db %01000000
+ .db %11000000
+ .db %11100000
+ .db %11100000
+ .db %11110000
+ .db %11110000
+ .db %11000000
+spr_boss06: ;modelled after a Nemesis][MSX boss
+ .db 16,15 ;.......:.......:
+ .db %00001111 ; █████
+ .db %00111110 ; █████ █████
+ .db %01111101 ; █████ █ ███████
+ .db %00000011 ; ██
+ .db %00000100 ; █ █
+ .db %00000011 ; █████
+ .db %00011110 ; ████ ██ ████
+ .db %11110011 ;████ ██ █ █
+ .db %00011110 ; ████ ██ ████
+ .db %00000011 ; █████
+ .db %00000100 ; █ █
+ .db %00000011 ; ██
+ .db %01111101 ; █████ █ ███████
+ .db %00111110 ; █████ █████
+ .db %00001111 ; █████
+ .db 15
+ .db %10000000
+ .db %11111000
+ .db %01111111
+ .db %00000000
+ .db %10000000
+ .db %11100000
+ .db %11011110
+ .db %01010000
+ .db %11011110
+ .db %11100000
+ .db %10000000
+ .db %00000000
+ .db %01111111
+ .db %11111000
+ .db %10000000
+spr_boss07: ;modelled after a Nemesis][MSX boss
+ .db 16,18 ;.......:.......:
+ .db %00000000 ; █ █
+ .db %00000111 ; ███ ███
+ .db %00000011 ; ████ █
+ .db %00000001 ; ██ ██
+ .db %00000011 ; ███ ██
+ .db %00000000 ; █████
+ .db %00010111 ; █ ██████████
+ .db %00111111 ; ██████ ██ ██
+ .db %11111000 ;█████ ██ █ ███
+ .db %00001111 ; █████ ██ █ █
+ .db %11111000 ;█████ ██ █ ███
+ .db %00111111 ; ██████ ██ ██
+ .db %00010111 ; █ ██████████
+ .db %00000000 ; █████
+ .db %00000011 ; ███ ██
+ .db %00000001 ; ██ ██
+ .db %00000011 ; ████ █
+ .db %00000111 ; ███ ███
+ .db 19 ; █ █
+ .db %01010000
+ .db %01110000
+ .db %11010000
+ .db %10110000
+ .db %10110000
+ .db %11111000
+ .db %11111110
+ .db %01101100
+ .db %11010111
+ .db %10110101
+ .db %11010111
+ .db %01101100
+ .db %11111110
+ .db %11111000
+ .db %10110000
+ .db %10110000
+ .db %11010000
+ .db %01110000
+ .db %01010000
+spr_boss08:
+ .db 14,14 ;.......:......7:
+ .db %01100111 ; ██ ████ ██
+ .db %11001011 ;██ █ ██ █ ██
+ .db %10110000 ;█ ██ ██ █
+ .db %10101111 ;█ █ ██████ █ █
+ .db %01010000 ; █ ██ ██ █
+ .db %01010011 ; █ █ ██ █ █
+ .db %10100111 ;█ █ ████ ██ █
+ .db %10100111 ;█ █ ████ ██ █
+ .db %01010011 ; █ █ ██ █ █
+ .db %01010000 ; █ ██ ██ █
+ .db %10101111 ;█ █ ██████ █ █
+ .db %10110000 ;█ ██ ██ █
+ .db %11001001 ;██ █ ██ █ ██
+ .db %01100111 ; ██ ████ ██
+ .db 14
+ .db %10011000
+ .db %01001100
+ .db %00110100
+ .db %11010100
+ .db %00101000
+ .db %00010100
+ .db %10110100
+ .db %10110100
+ .db %00010100
+ .db %00101000
+ .db %11010100
+ .db %00110100
+ .db %01001100
+ .db %10011000
+spr_boss09:
+ .db 16,19 ;.......:.......:
+ .db %01111011 ; ████ ███
+ .db %10000110 ;█ ██ █████
+ .db %00000011 ; ███ █
+ .db %00111011 ; ███ ██ ███
+ .db %00000111 ; ███ ███
+ .db %00001100 ; ██ ███ █
+ .db %00110111 ; ██ █████ █ ██
+ .db %01111011 ; ████ ██ █ ██ █
+ .db %11100100 ;███ █ ██ ██ █
+ .db %00000001 ; ██████ ██ █
+ .db %11100100 ;███ █ ██ ██ █
+ .db %01111011 ; ████ ██ █ ██ █
+ .db %00110111 ; ██ █████ █ ██
+ .db %00001100 ; ██ ███ █
+ .db %00000111 ; ███ ██
+ .db %00111011 ; ███ ██ ███
+ .db %00000011 ; ███ █
+ .db %10000110 ;█ ██ █████
+ .db %01111011 ; ████ ███
+ .db 19
+ .db %10000000
+ .db %11111000
+ .db %10100000
+ .db %00011100
+ .db %01110000
+ .db %11101000
+ .db %11010110
+ .db %00101101
+ .db %11011001
+ .db %11011001
+ .db %11011001
+ .db %00101101
+ .db %11010110
+ .db %11101000
+ .db %01100000
+ .db %00011100
+ .db %10100000
+ .db %11111000
+ .db %10000000
+
+;----------------------------------------------------------------------------
+;----------------------------- logo ------------------------------------------
+;----------------------------------------------------------------------------
+
+logo_nemesis:
+.db %11111111,%11111111,%11111111,%11111110,%11111111,%11110111,%11111111,%11111110,%11111111,%111101111,%11111111,%00001011,%11111111,%11111111,%11111111,%11111110
+.db %01111111,%11111111,%11111111,%11111110,%11111111,%11110111,%11111111,%11111110,%11111111,%111101111,%11111111,%00011011,%11111111,%11111111,%11111111,%11111100
+.db %00111111,%11111111,%11111111,%11111110,%11111111,%11110111,%11111111,%11111110,%11111111,%111101111,%11111111,%00111011,%11111111,%11111111,%11111111,%11111000
+.db %00011111,%11111111,%11111111,%11111110,%11111111,%11110111,%11111111,%11111110,%11111111,%111101111,%11111111,%01111011,%11111111,%11111111,%11111111,%11110000
+.db %00000000,%00000000,%00000001,%00011110,%00010000,%00000000,%10000001,%00011110,%00010000,%000000001,%00000000,%00001000,%01000000,%00000000,%00000000,%00000000
+.db %00000000,%00000000,%00000011,%00011110,%00110000,%00000001,%10000011,%00011110,%00110000,%000000011,%00000000,%00011000,%11000000,%00000000,%00000000,%00000000
+.db %00000000,%00000000,%00000111,%00011110,%01110000,%00000011,%10000111,%00011110,%01110000,%000000111,%00000000,%00111001,%11000000,%00000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%00000111,%10001111,%00011110,%11111111,%000001111,%11111111,%01111011,%11111111,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%00000111,%10001111,%00011110,%11111111,%000001111,%11111111,%01111011,%11111111,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%00000111,%10001111,%00011110,%11111111,%000001111,%11111111,%01111011,%11111111,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%00000111,%10001111,%00011110,%11111111,%000001111,%11111111,%01111011,%11111111,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11110000,%00000111,%10001111,%00011110,%11110000,%000000000,%00001111,%01111000,%00000011,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11110000,%00000111,%10001111,%00011110,%11110000,%000000000,%00001111,%01111000,%00000011,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11110000,%00000111,%10001111,%00011110,%11110000,%000000000,%00001111,%01111000,%00000011,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11110000,%00000111,%10001111,%00011110,%11110000,%000000000,%00001111,%01111000,%00000011,%11000000,%00000000,%00000000
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%11110111,%10001111,%00011110,%11111111,%111101111,%11111111,%01111011,%11111111,%11000000,%00000111,%11010001
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%11110111,%10001111,%00011110,%11111111,%111101111,%11111111,%01111011,%11111111,%11000000,%00000001,%00011011
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%11110111,%10001111,%00011110,%11111111,%111101111,%11111111,%01111011,%11111111,%11000000,%00000001,%00010101
+.db %00000000,%00000000,%00001111,%00011110,%11111111,%11110111,%10001111,%00011110,%11111111,%111101111,%11111111,%01111011,%11111111,%11000000,%00000001,%00010001
+
+;----------------------------- end ------------------------------------------
.end
.end
+;----------------------------------------------------------------------------
+;----------------------------------------------------------------------------
+;----------------------------------------------------------------------------
-
-;----------------------------- NEMESIS'86 by Shiar ----------------------------
-
-;----------------------------- version history --------------------------------
-
-;0.01.717 -- 17.VII.99 -- size 984
-;
-; + movement of ship over whole screen
-; + enemies moving from right to left, appearing right at specified times
+; 0.98.77 -- 7.VII.00 -- size 6707
;
-; 0.1.718 -- 18.VII.99 -- size 907
+; # bullets do damage in all levels
+; * more armor at armor-upgrade and extra armor at end of a level
+; - internal levels again (no need 4 external, safer/smaller)
+; # some registers not correctly pushed/popped
+; * several optimizations (init.procs some bytes smaller)
+; # enemies hit with hitpoints left disappeared (one pop too much...)
+; + bullets "charge up" (more damage) when not firing
+; - removed contrast changes
+; + more powerful bullets have different sprites (larger=more damage)
+; # multiples appear at your position (begin level/just selected)
+; # when invulnerable multiples acted weird
+; # no more error at activation after APD off after running Nemesis
+; # saves correctly if own name ain't "nemesis" + some bytes smaller
+; # screen wasn't always entirely cleared after quit
+; * waits until all keys have been released after death
+; + different bullets sizes will miss if they're too small
+; + at level start "press F1 to save"-text will be displayed
+; * w3.shiar.org displayed at title screen, black bar behind version nr
+; # score to 0 when exit pressed at main menu
+; # no residual story-text in first frame of game
+; # game doesn't continue again after death (stack messed up)
+; # game over when lives<0 (didn't work in v0.96+)
+; * using some self-modifiing code (so it's smaller)
+; # new random procedure: stars don't appear on one line anymore
+; * weapons appear centered at multiples
+; * laser properties can be changed (damage, charge)
+; + weapon can be combination of bullets/lasers (max. of 3 per weapon)
+; * bullet-icon is removed when laser is selected
+; * enemy sprite table integrated in enemy specs (-1 byte/enemy)
+; + random enemy is chosen from any number of enemies per level
+; * time to first enemy fire defined per enemy, not per level
+; + CLIPPED sprites!! no more in/out popping enemies! wow...
+; * bullets/enemies removed when _entirely_ off screen
+; # enemies would sometimes be hit by bullets going right below them
+; # size of the second bullet was too big (invisible hit)
+; * the frequency an enemy fires bullets is defined per enemy
+; + wide clipped sprites implemented (width 1-16 pixels)
+; # bosses first move left until x=100, otherwise they'd be off-screen
+; * at status bar left below ships are displayed for lives left
+; * armor bar is two pixels high (better visible)
+; # bullet overflow fixed again (>63 bullets fired)
+; # correct weapon loaded when continuing a saved game
+; # game freezed when generating a random value <=1
+; * you explode in a different way than the enemies
+; + screen inverts for a brief time when you are hit!
+; # stats-bar was messed up when ya got 0 lives left
+; * two new (big) bosses modeled after a common MSX Nemesis2-boss
+; * score increased once every 32 frames (instead of every 256)
+; # ground fixed for new random routine (smaller routine; incs -2 to 2)
+; + laser will upgrade as well when you reselect it
+; * 2nd can be used in main menu (wow!)
+; # altered variable storage space because of Nemesis grew beyond 6kb
+; # fixed armor bar display when at maximum
+; + a few new enemies (asteroids) and remade 1st 4 levels; new pickup
+; - torpedo since it was kinda useless
+; + second icon now selects TAIL BEAM: bullet going backwards
+; # armor increase at the end of a level doesn't overflow armorbar
+; + you can choose your own ship out of four vessel after NEW GAME!
+; + enemies can appear at any x-position and move both left and right
+; + move patterns given per enemy, not per level
+; * new (faster) enemy-move system; 10 basic moves (x2 left+right)
+; # enemies can _never_ move above or below visible screen
+; * "randomY"-enemies are placed entirely on screen (height calced)
+; # the major TI-OS crash bug WAS afterall caused by sprites drawn
+; (partially) outside screen memory. temporarily fixed by setting
+; virtual screen buffer to $8200 (enough mem there)
+; + upto 29 cool enemy sprites and redone first five levels
+; * improved enemy-move routine; smooth luring, five speeds+backwards
+; # after pause weapon will not be fired
+; # teacher key fixed (waits for GRAPH to be release before&after)
;
-; * no crash when level restarts for the third time
-; * exit-procedure updated, unnecessary stuff/keychecks removed
-; * alot of unused code removed
-; + different types of enemies (just look different)
-; + collision detection!! enemy ships disappear when you hit them
+; 0.99.99 -- 9.IX.00 -- size 6936
;
-; 0.2.718 -- 18.VII.99 -- size 1153
+; + you can have upto FOUR multiples! (~20 pixels apart)
+; * some optimizations: keycall, menu handling, port nops removed,
+; more SMC, fire handling, fast bullet handling, enemy movement
+; * better "backwards" enemies handling (and implemented in game)
+; # when enemy changed into a pickup, movement is set to vslow
+; * instead of turning into a pickup, enemies explode and a pickup
+; appears at the right side of the screen (moves left slowly)
+; # bullets do damage again (screenflash made damage become 0)
+; + when destroyed by bullets, the armor bar will show 0HP left
+; * all enemy bullets do the same damage in all levels
+; * you now appear at (*32*,30) because enemies can come from left
+; * improved bullet handling (faster, smaller, etc.)
+; + multiples are animated like real Nemesis (grow-shrink-grow-shrink>)
+; # fixed a bug that didn't select multiples when you were moving
+; # enemy collision screwed up invert and some other weird stuff
+; + in pause screen change contrast with up/down and B/W mode with F1
+; + lasers can have different durations (beams last longer)
+; * some sign-flag checkings replaced by carry-flag (thus reducing size)
+; # slow enemies (including pickups) didn't always appear (just 25-50%)
+; + enemies can fire different kinds of bullets: aiming, double, triple
+; * maximum number of bullets increased (48 for enemies, 128 for you)
+; * beamweapon can be selected when you got laser (like vice versa)
+; * selecting laser removes tailbeam or up-double
+; # tail beam/up-double correctly centered
+; # disappearing bullets (when enemies fired multiple bullets) fixed
+; + bullets and lasers both upgradable upto level 9
+; # fixed end story (_vputs didn't recognize 0-end when "'" in string)
+; # stars couldn't be altered anymore since recent levelformat changes
+; * maximum different enemies increased from 28 to 63
+; * pickup sprite altered, small changes to some enemies
+; + new moves implemented: 75% speed and lure-while-moving
+; # fixed the enemy aiming bullets procedure
+; * enemies fire their bullets centered too! (even the large bosses)
+; * you may NOT have any multiples together with beams, just lasers
+; + added new enemy guns: quad- and 6x-fire!!
+; * sprite table length increased to 768 bytes (stored DIV3)
+; + ships 3/4 select hardcore mode: score and damage are doubled
+; + first icon not only increases armor, but also activates shield for
+; some time (shield halves damage and absorbs bullets in normal mode)
+; + ship selection screen also shows ship specs (hardcore/tailbeam/etc)
+; * shield looks different for each ship
+; * hiscore/savegame procedure optimized (several bytes smaller)
+; + B<>W mode setting will be stored
+; * enemy sprite pointers stored as words (thus increasing sprite table
+; length from 768B to 65kB, and increasing sprite calculation speed)
+; * hardcore mode does _more_ than doubled damage (bulletsdamage +1)
+; * 10 bytes off by optimizing main menu a little
+; * and optimizations to hiscore name handling saved another 17 bytes!
+; * score increased by 1 per placed enemy, instead of time (otherwise
+; you could just evade bosses for a long time for very high score)
+; * findpixel optimized (or rather un-unoptimized: restored to original)
+; # ground fixed again (and optimized for tunnel only)
+; # prevents exploding more than once (not dieing while inside ground)
+; * some unneccessary pushes removed
+; + final boss also fires moving mines (just up/down-enemies)
+; * on collision less damage to enemy, more to you (bosses too simple)
+; * normal pickups will increase armor and shield directly (no [alpha])
+; + a large pickup'll appear at the end of a level which will select
+; your next upgrade: beamweapon, laser, multiple/tailbeam/up-double
+; + a small explosion is displayed when enemy's hit but not destroyed
+; # _all_ multiples appear at your position at start of level
+; # bug in selecting multiples fixed (recent bug)
+; + getting passed 3rd upgrade (4 pickups) increases score by 250!
+; - second icon integrated in 5th, first two icons removed (unused now)
+; * the armor bar is now 5 pixels in height; very visible
+; # if selecting upgrade or starting level, charge bar wasn't displayed
;
-; + ability to fire bullets (F1). Enemies disappear on impact
-; * enemies explode instead of disappearing
+; 1.00.99 -- 9.IX.00 -- size 6936
;
-; 0.3.719 -- 19.VII.99 -- size 1401
+; + ...
;
-; * bullets appear correctly (not INSIDE your ship)
-; + some enemies can take multiple hits (differs per class)
-; + all enemies fire bullets at random
-; + if you're hit by bullet/enemy, you'll lose one hitpoint
;
-; 0.4.720 -- 20.VII.99 -- size 1481
-;
-; * collision detection fixed and optimized (much faster now!)
-; + shell-icon added (YAS type)
-; * code optimizations, some data "compression"
-; * explosion looks better, and some vars removed/smaller
-; * enemies are removed if at left side (instead of becoming invisible)
-; + displays level number before each level begins
-
+; + added - removed * changed # bug fixed
+;bullet handling: (255/enemy)+419+putsprite cycles per bullet
\ No newline at end of file
git.shiar.nl / nemesis.git / blobdiff