- .include "asm86.h"
+ .include "asm86.h"
.include "ti86asm.inc"
.include "ti86abs.inc"
+
.org _asm_exec_ram
+
nop
jp Start
- .dw $0000
+ .dw $0001
.dw Title
-Title: .db "Nemesis v0.1.718 by Shiar",0
+ .dw spr_ship
+Title: .db "Nemesis v0.5.725 by Shiar",0
Start:
jr init
-;-------------------- init ----------------------------------------------------
+just_fired = $c0f9 ;byte
+temp1 = $c100 ;word
+
+;---------------------- init --------------------------------------------------
init:
call _runindicoff
-;-------------------- main menu -----------------------------------------------
+;---------------------- main menu ---------------------------------------------
- jp play_game
-
-;-------------------- exit ----------------------------------------------------
-
-exit_game:
- ret
-
-;----------------------- game setup -------------------------------------------
+;---------------------- game setup --------------------------------------------
play_game:
- ld hl,stored_data_start
- ld bc,variables_end-stored_data_start-1
-
-;---------------------- display setup ----------------------------------------
-
-set_up_display:
- call _clrLCD
-
- ld hl,in_game_text
- ld b,3
-l11: ld a,(hl)
- ld (_curCol),a
- inc hl
- ld a,(hl)
- ld (_curRow),a
- inc hl
- call _puts
- djnz l11
-
-in_game_text:
- .db 16,0,"LIVES",0
- .db 16,3,"LEVEL",0
- .db 16,6,"SCORE",0
-
-str_question:
- .db "-----",0
+ call Next_level
;------------------------------------------------------------------------------
-;-------------------------- game loop -----------------------------------------
+;---------------------- game loop ---------------------------------------------
;------------------------------------------------------------------------------
game_main_loop:
game_stuff:
call Level_event ;insert enemies
call Handle_Ship ;move you
+ call Fire_bullet ;check for fire
call Handle_enemies ;move enemies
+ call Handle_bullets ;move your bullets
+ call Enemy_bullets ;move enemy bullets
call Enemies_hit ;check for collision with enemies
call Display_Screen ;display all
-; halt \ halt \ halt ;delay
+ halt \ halt \ halt ;delay
jr game_main_loop ;loop
quit: ret
dec a
jr nz,displayloop
-; ld hl,$1007 ;Display Score
-; ld (_curRow),hl
-; ld hl,(score)
-; jp _D_HL_DECI
+ ld hl,$1006 ;Display Score
+ ld (_curRow),hl
+ ld hl,(timer)
+ ld h,0
+ jp _D_HL_DECI
ret
;------------------------- handle ship ----------------------------------------
Handle_Ship:
- ld a,(your_status)
-; bit 4,a
-; jr nz,you_not_normal
+ ld a,(your_occ)
or a
- jr z,ok
-; dec a
-; ld (your_status),a
-; ld hl,(lives)
-; ld a,l
-; or h
-; jr nz,ok
-; pop af
-; ret
+ jr z,ok ;0 = normal stat
+
+ inc a ;next (explosion)frame
+ ld (your_occ),a ;save
+
+ cp 34 ;last explosion frame?
+ jr c,exploding_you ;not yet: display explosion
+ cp 54 ;delay finished?
+ jp z,game_over ;yes = game over
+ ret ;don't display anything
ok:
ld a,%01111110
cp 15 ;y > 15
jr z,no_up
ld (hl),a
-no_up: ld ix,spr_ship
+no_up: ld ix,spr_ship01
display_common:
ld e,(hl)
- jp drw_spr
-
-;you_not_normal:
-; ld hl,(score)
-; ld de,-6
-; add hl,de
-; ld a,255
-; cp h
-; jr nz,_ok_
-; ld hl,0
-;_ok_: ld (score),hl
-; 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
-; add a,a
-; ld c,a
-; ld b,0
-; ld ix,spr_explosion
-; add ix,bc
-; inc hl
-; ld d,(hl)
-; inc hl
-; jr display_common
+ jp drw_spr ;ret
+
+exploding_you:
+ srl a ;half the framerate
+ dec a ;first frame is 1>inc>srl>dec = 0
+ ld hl,x-1
+
+explosion_stuff:
+ rra
+ add a,a
+ add a,a
+ add a,a
+ 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 a,1 ;set to explode (1st frame)
+ ld (your_occ),a
+ ret
+
+;------------------------- fire bullet ----------------------------------------
+
+Fire_bullet:
+ ld a,%00111111
+ out (1),a
+ ld a,(your_occ)
+ 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
+ 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
+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
+
+found_ybullet:
+ ld (hl),1 ;use bullet
+ inc hl
+ ld a,(x)
+ add a,5
+ ld (hl),a ;set x
+ ld a,(y)
+ add a,2
+ inc hl
+ ld (hl),a ;set y
+ ret
+
+;------------------------ handle bullets --------------------------------------
+
+remove_bullet:
+ dec hl
+ ld (hl),0 ;dump this bullet!
+ ret
+
+Handle_bullets:
+ ld hl,ybullets
+ ld b,10
+scan_bullets:
+ push bc
+ push hl
+ ld (temp1),hl
+ ld a,(hl)
+ inc hl
+ dec a
+ call z,bullet_type1
+ pop hl
+ pop bc
+ ld de,3
+ add hl,de
+ djnz scan_bullets
+ 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,nrenemies
+ ld hl,enemies
+
+hit_enemies: ;Hits with normal enemies
+ push hl
+
+ ld a,(hl)
+ and %00000010
+ jr z,nohit ;no hit when enemy_occ <> 2/3
+
+ inc hl
+ inc hl
+ ld a,(hl) ;check x
+ sub d
+ add a,5
+ jp m,nohit
+ cp 8
+ jr nc,nohit
+
+ inc hl
+ 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 ;push occ
+ 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 ;pop occ
+ sub %00000100 ;decrease HP by one
+ ld (hl),a ;save
+ pop hl
+ ret
+
+nohit: pop hl
+ inc hl
+ inc hl
+ inc hl
+ inc hl
+ djnz hit_enemies ;check next enemy
+ ret
;--------------------------- level events -------------------------------------
ret nz
do_event:
- ld hl,(curevent) ;+1
+ ld hl,(curevent)
ld de,enemies-4
chk_noenemy:
inc de
inc de
inc de
ld a,(de)
- or a
+ or a ;0 = no enemy present
jr nz,chk_noenemy
- ld a,$01
- ld (de),a ;occ
- inc de
+ ld a,(hl) ;type
+ ld hl,enemy01
+ ld c,a
+ ld b,0
+ add hl,bc
+ add hl,bc
+ add hl,bc ;hl = enemy specs
+ ld a,(hl) ;load hitpoints+occ of this enemy class
+ ld (de),a ;occ
- ld a,(hl)
- ld (de),a ;type
+ inc hl
inc de
+ ld a,(hl) ;load movement+type of this enemy class
+ ld (de),a ;type
- ld a,$5a
- ld (de),a ;x
+ inc de
+ ld a,$5a ;appear at right edge of screen
+ ld (de),a ;x
inc de
- inc hl ;+2
+ ld hl,(curevent)
+ inc hl
ld a,(hl)
- ld (de),a ;y
+ ld (de),a ;y
- inc hl ;+0
+ inc hl ;@ next event
ld a,(hl)
- cp $ff
+ cp $ff ;255 = end marker
jp z,Next_level
- ld (nextevent),a
+ ld (nextevent),a ;else time to next event
- inc hl ;+1
- ld (curevent),hl
+ inc hl
+ ld (curevent),hl ;update pointer
+
+ or a ;no delay
+ jr z,do_event
+ ret ;no more events for now
+
+;--------------------------- enemy fires --------------------------------------
+
+Enemy_fires: ;de = x,y
+ dec d
+ dec d ;d = x-2
+ inc e ;e = y+1
+
+ ld b,10
+ ld hl,ebullets
+find_ebullet:
+ ld a,(hl)
+ or a
+ jr z,found_ebullet ;0 = not used
+ inc hl
+ inc hl
+ inc hl
+ djnz find_ebullet ;look next bullet
ret
+found_ebullet:
+ ld (hl),1 ;use bullet
+ inc hl
+ ld (hl),d ;set x-pos
+ inc hl
+ ld (hl),e ;set y-pos
+ ret
+
+;----------------------------- enemy bullets ----------------------------------
+
+Enemy_bullets:
+ ld hl,ebullets
+ ld b,10
+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
+ 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
+ ld e,(hl) ;e=y
+ ld ix,spr_bullet11 ;display enemy bullet
+ call drw_spr
+
+ ld a,(your_occ)
+ or a
+ jr nz,next_bullet ;0 = you're normal
+
+ pop hl
+ push hl
+ inc hl ;check x
+ ld a,(x)
+ sub (hl)
+ add a,6
+ jp m,next_bullet
+ cp 9
+ jr nc,next_bullet
+
+ inc hl ;check y
+ ld a,(y)
+ sub (hl)
+ add a,6
+ jp m,next_bullet
+ cp 9
+ jr nc,next_bullet
+
+ call damage_you ;HIT!!
+remove_ebullet:
+ dec hl
+ ld (hl),0 ;bullet > unused
+ jr next_bullet
+
;--------------------------- handle enemies -----------------------------------
Handle_enemies:
ld hl,enemies
+ ld b,nrenemies ;loop 20x
handle_enemy:
+ push bc
push hl
ld a,(hl)
- cp 1
- jr nz,next_enemy
+ and %00000011
+ jr z,next_enemy ;occ "no enemy" 0
+ dec a
+ jr z,exploding_enemy ;occ "exploding" 1
+ ld b,1
+ dec a
+ jr z,normal_enemy ;occ "normal" 2
+
+moving_enemy: ;occ "moving" 3
+ ld b,0
+normal_enemy:
inc hl
- ld c,(hl) ;type
+ ld a,(hl) ;type
+ and %11100000 ;move-type
+ add a,b ;add move bit from occ
+ ld b,a ;save in b
+ ld a,(hl) ;type
+ add a,a
+ add a,a
+ add a,a
+ ld c,a ;type*8 = offset
+
inc hl
- ld d,(hl) ;x
+ ld a,(hl) ;x
+ dec a ;move left
+ jp m,remove_enemy ;off screen
+ jr z,remove_enemy ;"
+ ld d,a
+
inc hl
ld e,(hl) ;y
-
- ld a,d
- or a
- jr z,next_enemy
+ ld a,b ;%xxx00001=moving -0=normal
dec a
- ld d,a
- jr z,remove_enemy
+ jr z,ymove_done ;skip y-move
- ld (hl),e
- dec hl
- ld (hl),d
+; srl a
+; ld b,a ;b = %0xxx0000 (move stat)
+ ld a,(timer)
+ and %00010000 ;switches 0<>1 every 16 turns
+; add a,b ;a = new move stat
+; add a,a
+; ld b,a ;b = %xxx00000 (new move stat*2)
+
+; dec hl \ dec hl
+; ld a,(hl) ;type
+; and %00011111 ;reset move-type
+; add a,b ;set new move-type
+; ld (hl),a
+; inc hl \ inc hl ;@y
+
+; and %00100000
+ jr z,movedown
+moveup: dec (hl) ;decrease y-pos
+ jr ymove_done
+movedown:
+ inc (hl) ;increase y-pos
+
+ymove_done:
+ dec hl ;@x
+ ld (hl),d ;store new x
ld ix,spr_enemy01
ld b,$00
add ix,bc
- call drw_spr
- jr next_enemy
-remove_enemy:
- dec hl
- dec hl
- dec hl
- ld (hl),$0000
+; push hl ;save registers
+ push de
+ call drw_spr ;display
+ pop de ;restore (destroyed by drw_spr)
+; pop hl
+
+; dec hl
+; ld b,(hl) ;type
+; and %00011111 ;enemy class
+; ld hl,enemy01 ;all enemies' specs
+; inc b ;next enemy's specs
+; ld c,$00
+; add hl,bc
+; add hl,bc
+; add hl,bc ;go there
+; dec hl ;last byte of this enemy's specs
+
+ ld a,$ff ;fire frequency
+ call Random ;random value < a
+ dec a ;fire if 1
+ call z,Enemy_fires ;fires bullet
+ jr next_enemy
+remove_enemy:
+ pop hl
+ ld (hl),$0000 ;bye bye enemy
+ push hl
next_enemy:
pop hl
- inc hl
- inc hl
- inc hl
- inc hl
- ld a,(hl)
- cp $ff
- jr nz,handle_enemy
-
+ ld bc,$0004
+ add hl,bc
+ pop bc
+ djnz handle_enemy
ret
+exploding_enemy:
+ inc hl
+ push hl
+ ld a,(hl)
+ call explosion_stuff ;display explosion
+ pop hl
+
+ ld a,(hl)
+ cp 15
+ jr z,remove_enemy ;remove when at last frame
+ inc a
+ ld (hl),a ;next frame
+ jr next_enemy
+
;--------------------------- check collision ----------------------------------
Enemies_hit:
- ld de,(x) ;e = X, d = Y
- ld hl,enemies-4
-check_next:
- inc hl
- inc hl
- inc hl
- inc hl
+ ld a,(your_occ)
+ or a ;0 = you're normal
+ ret nz
- ld a,(hl)
- cp $ff
- ret z ;-1 = no more enemies
+ ld de,(x) ;e = X, d = Y
+ ld hl,enemies
+ ld b,nrenemies ;check all 20 enemies
+check_collision:
push hl
- cp 1
- jr nz,nocrash ;1 = enemy
+ ld a,(hl)
+ and %00000010
+ jr z,check_next ;2/3 = ok
inc hl
inc hl
ld a,(hl) ;check x match
sub e
add a,6
- jp m,nocrash
+ jp m,check_next
cp 12
- jr nc,nocrash
+ jr nc,check_next
inc hl
ld a,(hl) ;check y match
sub d
add a,6
- jp m,nocrash
+ jp m,check_next
cp 12
- jr nc,nocrash
+ jr nc,check_next
dec hl
dec hl
- ld (hl),0
+ xor a
+ ld (hl),a ;explosionFrame 0
dec hl
- ld (hl),2 ;set to explode
+ inc a
+ ld (hl),a ;set to explode
+ call damage_you ;auch!
-nocrash:
+check_next:
pop hl
- jr check_next
+ inc hl
+ inc hl
+ inc hl
+ inc hl
+ djnz check_collision
+ ret
;--------------------------- next level ---------------------------------------
Next_level:
- ld hl,Leveldata+1
+ ld hl,Leveldata+1 ;reset level data
+ ld (curevent),hl
+
+ call _clrLCD ;clear screen
+ ld hl,$0703
+ ld (_curRow),hl ;center
+ ld hl,txt_level
+ call _puts ;display "LEVEL "
+
+ ld a,(level)
+ inc a ;increase level nr.
+ ld (level),a
+ ld l,a
+ ld h,$00
+
+ 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
+
+ ld b,$20
+wait: halt \ halt
+ djnz wait ;delay
+ call _getkey ;wait for keypress
+ jr game_setup ;prepare display and vars
+ ret
+
+;--------------------------- game over ----------------------------------------
+
+game_over:
+ ld hl,Leveldata+1 ;reset level data
ld (curevent),hl
+
+ call _clrLCD ;clear screen
+ ld hl,$0603
+ ld (_curRow),hl ;center
+ ld hl,txt_gameover
+ call _puts ;display "GAME OVER"
+
+ ld b,$20
+wait2: halt \ halt
+ djnz wait2 ;delay
+ call _getkey ;wait for keypress
+ jr game_setup ;prepare display and vars
+ ret
+
+;---------------------- setup game --------------------------------------------
+
+game_setup:
+ call _clrLCD
+ ld hl,$1005
+ ld (_curRow),hl
+ ld hl,txt_score ;display "SCORE"
+ call _puts ;display texts
+
+ xor a
+ ld (timer),a ;reset time
+ ld (level),a ;level 1
+ ld hl,Leveldata+1
+ ld (curevent),hl ;reset level
+ ld hl,(Leveldata)
+ ld (nextevent),hl
+ ;ret
+;---------------------- exit --------------------------------------------------
+
+exit_game:
ret
;--------------------------- putsprite ----------------------------------------
djnz _oloop
ret
-
+;---------------------- random ------------------------------------------------
+
+Random: ; Creates a random number 0 <= x < A
+ push bc
+ push de
+ push hl
+ ld b,a
+ ld a,r
+ add a,a
+ ld hl,0
+ ld d,0
+ ld e,a
+RMul:
+ add hl,de
+ djnz RMul
+ ld a,h
+ pop hl
+ pop de
+ pop bc
+ ret
+
+;------------------------
_D_HL_DECI:
push bc
;------------------------------- sprites --------------------------------------
spr_ship:
- .db 7,7
- .db %11111000
- .db %11000000
- .db %11111100
- .db %11111110
- .db %11111100
- .db %11000000
- .db %11111000
+ .db 9,1 ;ship icon
+ .db %11100000 ; ███
+ .db %11111000 ; █████
+ .db %00111110 ; █████
+ .db %11111001 ; █████ █
+ .db %11111101 ; ██████ █
+ .db %11111001 ; █████ █
+ .db %00111110 ; █████
+ .db %11111000 ; █████
+ .db %11100000 ; ███
+
+spr_ship01:
+ .db 7,7 ;ship alpha class
+ .db %01110000 ; ███
+ .db %11100000 ; ███
+ .db %11111100 ; ██████
+ .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
- .db %11110000
- .db %11111000
- .db %11110000
-
+ .db 5,3 ;your bullets
+ .db %00110000 ; ░▒▓██
+ .db %11111000 ; ░▒▓█████
+ .db %00110000 ; ░▒▓██
spr_bullet02:
- .db 3,3
- .db %01000000
- .db %11100000
- .db %01000000
+ .db 5,3 ;your bullets
+ .db %11110000 ; ░▒▓████
+ .db %11111000 ; ░▒▓█████
+ .db %11110000 ; ░▒▓████
-spr_enemy01:
- .db 6,6
- .db %00111100
- .db %01110000
- .db %11110000
- .db %11110000
- .db %01110000
- .db %00111100
-spr_enemy02:
- .db 6,6
- .db %01111100
- .db %11110000
- .db %10111000
- .db %10111000
- .db %11110000
- .db %01111100
+spr_bullet11:
+ .db 3,3 ;enemy bullets
+ .db %01000000 ; █▓▒░
+ .db %11100000 ; ███▓▒░
+ .db %01000000 ; █▓▒░
spr_explosion:
- .db 8,6
- .db %00000000
- .db %00011100
- .db %00111110
- .db %01010110
- .db %00111000
- .db %00000000
-
- .db 8,6
- .db %00110000
- .db %01001110
- .db %10111110
- .db %01001111
- .db %00111000
- .db %00011010
-
- .db 8,6
- .db %11110011
- .db %01001110
- .db %10110101
- .db %01000101
- .db %00111110
- .db %11011010
-
- .db 8,6
- .db %11110010
- .db %01001110
- .db %10110101
- .db %01000101
- .db %00111110
- .db %01011010
-
- .db 8,6
- .db %01000001
- .db %00100110
- .db %00010101
- .db %01000100
- .db %00010010
- .db %10011010
-
- .db 8,6
- .db %01000100
- .db %00100000
- .db %00000001
- .db %01000100
- .db %00100010
- .db %10001000
-
- .db 8,6
- .db %00001000
- .db %11000010
+ .db 8,6 ;1
.db %00000000
- .db %00100000
- .db %00000001
- .db %00110000
-
- .db 8,6
- .db %00000100
- .db %00000000
- .db %01000000
+ .db %00011100 ; ███
+ .db %00111110 ; █████
+ .db %01010110 ; █ █ ██
+ .db %00111000 ; ███
.db %00000000
- .db %00000001
- .db %00100100
-
-;---------------------------- level data -------------------------------------
-Leveldata:
- .db $10,$00,$40 ;$time (ff=end) $type $y-pos
- .db $10,$08,$30
- .db $10,$08,$20
- .db $40,$00,$10
- .db $ff,$ff,$ff
-
-;---------------------------- texts ------------------------------------------
-title_message:
- .db "* * NEMESIS * *",0
-
-;---------------------------- save data --------------------------------------
+ .db 8,6 ;2
+ .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 8,6 ;4
+ .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 8,6 ;6
+ .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 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_gameover: .db "GAME OVER!",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
-lives .dw $0003
-level .dw $0000
-x .db $16
-y .db $46
-shield .db $00
-ybullets .dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-ebuls .dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+
+your_occ .db $00 ;0=normal 1..16=exploding
+;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)
+
+nrenemies = 32
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,$0000,$ffff,$ffff
-; 0011 2233 >> 0=occupation (0=no enemy 1=normal 2=exploding)
-; 1=frame/ship 2=x 3=y
+ .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,$0000,$0000
-boss_status .db 00
-boss_pwr .db 00
-boss_x .db 00
-boss_y .db 00
-boss_2bytes .dw 0000
+; %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)
-timer .dw $0000
-your_status .db $00
- .db $00
-warped_status .db $00
-variables_end:
+;---------------------------- enemy data --------------------------------------
-stored_data_end:
+spr_enemy01:
+ .db 6,6 ;enemy type one
+ .db %00111100 ; ████
+ .db %01110000 ; ███
+ .db %11110000 ; ████
+ .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: ;HP:1 move:- fire:-
+ .db %00000010,%00000000,%00000000 ;first two enemy bytes
+enemy02: ;HP:1 move:1 fire:1.5%
+ .db %00000011,%00100001,%01111111
+enemy03: ;HP:2 move:- fire:3%
+ .db %00000110,%00000010,%00001111
+enemy04: ;HP:5 move:- fire:6%
+ .db %00010010,%00000011,%00000011
+enemy05: ;HP:10 move:- fire:25%
+ .db %00100111,%00000100,%00000011
+
+;---------------------------- level data --------------------------------------
+
+Leveldata: ;time,enemyclass,ypos
+ .db $0d,$00,$38 ;first wave (bottom)
+ .db $00,$00,$40
+ .db $00,$00,$48
+ .db $1e,$00,$10 ;second wave (top)
+ .db $00,$00,$18
+ .db $00,$00,$20
+ .db $1e,$00,$24 ;third wave (middle)
+ .db $00,$02,$2c
+ .db $00,$00,$34
+
+ .db $0d,$00,$10 ;top & bottom
+ .db $00,$00,$4a
+ .db $2a,$01,$2d ;middle: moving
+ .db $0c,$02,$2d ; 3HP
+ .db $0b,$02,$2d ; 3HP
+ .db $09,$00,$27 ;two 1HP behind him
+ .db $00,$00,$33
+ .db $09,$02,$21 ;two 3HP behind them
+ .db $00,$02,$39
+ .db $09,$02,$1b ;and two 3HP behind them
+ .db $00,$02,$3f
+
+ .db $15,$03,$11 ;one vertical line of 8HPs
+ .db $00,$03,$19
+ .db $00,$03,$21
+ .db $00,$03,$29
+ .db $00,$03,$31
+ .db $00,$03,$39
+ .db $00,$03,$41
+ .db $00,$03,$49
+
+ .db $0c,$02,$11 ;one vertical line of 3HPs
+ .db $00,$02,$19
+ .db $00,$02,$21
+ .db $00,$02,$29
+ .db $00,$02,$31
+ .db $00,$02,$39
+ .db $00,$02,$41
+ .db $00,$02,$49
+
+ .db $0c,$00,$11 ;one vertical line of 1HPs
+ .db $00,$00,$19
+ .db $00,$00,$21
+ .db $00,$00,$29
+ .db $00,$00,$31
+ .db $00,$00,$39
+ .db $00,$00,$41
+ .db $00,$00,$49
+
+
+
+
+
+
+
+ .db $f1,$01,$40
+ .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 --------------------------------------------
.end
+.end
-;NEMESIS'86 by Shiar
+;----------------------------- NEMESIS'86 by Shiar ----------------------------
+;----------------------------- version history --------------------------------
-; 0.01.717 -- 17.VII.99 -- size 984
+;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
;
-; 0.1.718 -- 18.VII.99 -- size 907
+; 0.1.718 -- 18.VII.99 -- size 907
;
-; * no crash when level restarts for the third time
+; # 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
+;
+; 0.2.718 -- 18.VII.99 -- size 1153
+;
+; + ability to fire bullets (F1). Enemies disappear on impact
+; * enemies explode instead of disappearing
+;
+; 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
+;
+; 0.5.725 -- 25.VII.99 -- size 1778
+;
+; * waits a sec at level display (in case of accidental keypress)
+; * moving enemies (move up&down)
+; # bullets removed correctly so they can be used again later
+; * first level made
+; # enemy weaponfire is fired from correct positions
+; + your ship explodes on impact with ships/bullets
+; * game over screen will be displayed just *after* your ship's gone
+; + frame counter onscreen
+;
-
+; + added - removed * changed # bug fixed
git.shiar.nl / nemesis.git / blobdiff