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ws.asm
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; Wondersnake
; (c) Tomasz Slanina
; tomasz@slanina.pl
;
; GNU GPL v3 License
.model tiny
.186
.code
JUMPS
S_COUNTER equ 19*2
S_TAILL equ 8
S_DELAY equ 14
Z_COUNTER equ 0
Z_KEY equ 2
Z_KEYAND equ 4
Z_HEAD equ 6
Z_TAIL equ 10
Z_HEADDIR equ 14
Z_HEADOLD equ 16
Z_DELAY equ 18
Z_TAILL equ 20
Z_RND equ 22
Z_LEVEL equ 24
Z_FOOD equ 26
Z_PASSWORD equ 28
Z_MENU equ 40
Z_KW equ 42
Z_KWE equ 72
Z_KKK equ 74
END_MENU equ 76
NUM_OPTION equ 78
ENTER_PASS equ 80
LAST_PLAYED equ 82
PASS_LETTER equ 84
FINISH equ 86
NUM_LEVEL equ 88
org 100h
start:
cli
cld
mov sp,100h
xor ax,ax
mov ss,ax
mov es,ax
mov es:[LAST_PLAYED],al ;base level
mov al,0e0h
out 60h,al ;gfx mode
mov al,1
out 14h,al
call title_screen
sta:
mov sp,100h
call tit
xor ax,ax
mov es,ax
mov al,es:[END_MENU]
dec al
mov es:[NUM_LEVEL],al
xor ax,ax
mov es:[Z_COUNTER],ax
big_loop:
xor ax,ax
mov es,ax
mov al,es:[NUM_LEVEL]
call levelinfo
call level
xor ax,ax
mov es,ax
mov al,es:[NUM_LEVEL]
inc al
mov es:[NUM_LEVEL],al
cmp al,20
jz congratulations
jmp big_loop
level:
mov ax,8000h
mov ds,ax
xor ax,ax
out 10h,ax
out 12h,ax
mov al,1+2
out 0,al
mov al,21h
out 7,al ; scrloc 800,1000
xor di,di
push di
pop es
mov di,4000h
mov si,offset tile_data
mov cx,48*32
cld
rep movsw
mov si,offset palety
mov di,0fe00h
mov cx,100h
rep movsw ;palety
mov di,800h
mov cl,16
l1:
mov ch,16
l2:
mov ax,1+2*512
stosw
mov ax,2+2*512
stosw
dec ch
jnz l2
mov ch,16
l3:
mov ax,3+2*512
stosw
mov ax,4+2*512
stosw
dec ch
jnz l3
dec cl
jnz l1 ;mamy background
call licznik
mov ax,S_DELAY
mov es:[Z_DELAY],ax
mov al,es:[NUM_LEVEL]
mov es:[LAST_PLAYED],al
xor ah,ah
call makelevel
mainloop:
mov dx,2
cz1:
in al,dx
cmp al,90
jnz cz1
cz2:
in al,dx
cmp al,91
jnz cz2
call skrol
mov ax,es:[Z_DELAY] ; calculate delay
dec ax
mov es:[Z_DELAY],ax
or ax,ax
jnz mainloop
mov ax,S_DELAY
mov es:[Z_DELAY],ax
mov al,es:[Z_FOOD]
or al,al
jnz is_food
mov ax,150
call wait_frames
ret
is_food:
;vblank
call licznik
call keypad
mov al,es:[Z_KEYAND]
and al,0f0h
shr al,4
mov bl,al ;bl = new direction
mov ax,es:[Z_HEADDIR]
or bl,bl
jnz dalej1
mov bl,al
dalej1:
xor bh,bh
mov es:[Z_HEADDIR],bx
mov ah,al
mov al,bl
test al,1
jnz mov_gora
test al,2
jnz mov_prawo
test al,4
jnz mov_dol
mov_lewo:
mov dx,-2 ;co dodamy do wspolrzednych
mov cx,10+4000h ;lewo - gdzie glowa
test ah,2
jnz game_over
mov bx,45
test ah,8
jnz wpisz ;przedtem tez lewo
mov bx,46
test ah,1
jnz wpisz ; przedtem do gory
mov bx,47
jmp wpisz ;przedtem w dol
mov_prawo:
mov dx,2 ;co dodamy do wspolrzednych
mov cx,10 ;prawo - gdzie glowa
test ah,8
jnz game_over
mov bx,49
test ah,2
jnz wpisz ;prev = left
mov bx,51
test ah,1
jnz wpisz ;prev = up
mov bx,50
jmp wpisz ;prev = down
mov_gora:
mov dx,-64 ;co dodamy do wspolrzednych
mov cx,9+8000h ;prawo - gdzie glowa
test ah,4
jnz game_over
mov bx,53
test ah,1
jnz wpisz ;przedtem tez gora
mov bx,54
test ah,2
jnz wpisz ;przedtem do gory
mov bx,55
jmp wpisz ;przedtem w dol
mov_dol:
mov dx,64 ;co dodamy do wspolrzednych
mov cx,9 ;prawo - gdzie glowa
test ah,1
jnz game_over
mov bx,57
test ah,4
jnz wpisz ;przedtem tez lewo
mov bx,58
test ah,2
jnz wpisz ;przedtem do gory
mov bx,59
wpisz:
;bx co do nowego , cx co do starego , dx jakie nowe
inc bx
mov di,1000h
add di,es:[Z_HEAD]
add di,dx
mov ax,es:[di]
or ax,ax
jz dalej11
cmp ax,512+11+62
jnz game_over
;zwiekszamy licznik
push bx
push cx
mov ax,es:[Z_COUNTER]
mov bx,1
add ax,bx
daa
mov es:[Z_COUNTER],ax
dec byte ptr es:[Z_FOOD]
mov ax,S_TAILL
mov es:[Z_TAILL],ax
pop cx
pop bx
dalej11:
mov di,1000h
add di,es:[Z_HEAD]
mov es:[di],bx
add di,dx
mov es:[di],cx
sub di,1000h
mov es:[Z_HEAD],di
moveogon:
mov ax,es:[Z_TAILL]
or ax,ax
jz ddl
dec ax
mov es:[Z_TAILL],ax
jmp mainloop
ddl:
mov ax,es:[Z_TAIL]
add ax,1000h
mov di,ax
mov bx,es:[di]
mov cx,-2
cmp bx,5
jz ogon
mov cx,2
cmp bx,6
jz ogon
mov cx,-64
cmp bx,7
jz ogon
mov cx,64
ogon:
xor si,si
mov di,ax
mov es:[di],si ;czyscimy
add ax,cx
mov di,ax
mov bx,es:[di]
sub ax,1000h
mov es:[Z_TAIL],ax ;bx to to co bylo
sub bx,46
shr bx,2
add bx,5
mov es:[di],bx
jmp mainloop
licznik:
xor ax,ax
mov es,ax
mov si,Z_COUNTER
mov ax,es:[si]
mov cx,ax
mov di,S_COUNTER+1000h
mov ax,3*512+17
stosw
mov ax,18+3*512
stosw
add di,8
mov ax,21+3*512
stosw
mov di,S_COUNTER+1000h+64
mov ax,3*512+19
stosw
mov ax,20+3*512
stosw
add di,8
mov ax,22+3*512
stosw
mov al,ch
shr ax,4
and ax,0fh
add ax,23+3*512
mov di,S_COUNTER+1000h+4
stosw
mov al,ch
and ax,0fh
add ax,23+3*512
stosw
mov al,cl
shr ax,4
and ax,0fh
add ax,23+3*512
stosw
mov al,cl
and ax,0fh
add ax,23+3*512
stosw
mov al,ch
shr ax,4
and ax,0fh
add ax,23+3*512+10
mov di,S_COUNTER+1000h+4+64
stosw
mov al,ch
and ax,0fh
add ax,23+3*512+10
stosw
mov al,cl
shr ax,4
and ax,0fh
add ax,23+3*512+10
stosw
mov al,cl
and ax,0fh
add ax,23+3*512+10
stosw
ret
keypad:
mov dx,0b5h
mov al,20h
out dx,al
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
in al,dx ;kierunki
and al,0fh
test al,1
jz v1
and al,1
v1:
test al,2
jz v2
and al,2
v2:
test al,4
jz v3
and al,4
v3:
test al,8
jz v4
and al,8
v4:
shl al,4
mov bl,al
mov al,40h
out dx,al
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
in al,dx ;kierunki
and al,0fh
mov cl,al
or bl,al
mov al,es:[Z_KEY]
mov es:[Z_KEY],bl
xor al,bl
and al,bl
mov es:[Z_KEYAND],al
ret
makelevel:
mov es:[Z_LEVEL],ax
mov si,offset levels
xor dx,dx
mov bx,336
mul bx
add si,ax
mov di,1000h+64+64+2+2
mov ch,14
ml1:
mov cl,24
ml2:
mov al,ds:[si]
mov ah,0
or al,al
jz is_zero
mov bx,8*512
cmp al,11
jnz skip_set
mov bx,1*512
skip_set:
add ax,bx
add ax,62
is_zero:
mov es:[di],ax
add di,2
inc si
dec cl
jnz ml2
add di,64-24*2
dec ch
jnz ml1
;ramka
mov di,1000h
mov ax,3*512+16
stosw
mov cx,26
mov ax,13+3*512
rep stosw
mov ax,3*512+16+4000h
stosw ;gorny rzad
mov di,1000h+32*2
mov ax,3*512+11
stosw
mov ax,3*512+14
stosw
mov cx,24
mov ax,15+3*512
rep stosw
mov ax,3*512+14+4000h
stosw
mov ax,3*512+11+4000h
stosw ;gorny rzad cd
mov di,1000h+17*32*2
mov ax,3*512+16+8000h
stosw
mov cx,26
mov ax,13+3*512+8000h
rep stosw
mov ax,3*512+16+8000h+4000h
stosw ;dolny rzad
mov di,1000h+16*32*2
mov ax,3*512+11
stosw
mov ax,3*512+14+8000h
stosw
mov cx,24
mov ax,15+3*512+8000h
rep stosw
mov ax,3*512+14+4000h+8000h
stosw
mov ax,3*512+11+4000h
stosw ;dolny rzad cd
mov cx,14
mov di,1000h+32*2*2
lk1:
mov ax,11+3*512
stosw
mov ax,12+3*512
stosw
add di,32*2-4
loop lk1
mov cx,14
mov di,1000h+32*2*2+26*2
lk2:
mov ax,12+3*512+4000h
stosw
mov ax,11+3*512+4000h
stosw
add di,32*2-4
loop lk2
mov ax,2
mov es:[Z_HEADDIR],ax
mov es:[Z_HEADOLD],ax
push es
mov cl,es:[NUM_LEVEL]
mov si,offset start_offsets
xor ch,ch
add cx,cx
add si,cx
mov ax,8000h
mov es,ax
mov cl,es:[si] ;x
mov ch,es:[si+1];y
add cl,2
add ch,2
mov al,ch
xor ah,ah
shl ax,6 ;*64
xor ch,ch
add cx,cx
add ax,cx
pop es
push ax
mov es:[Z_HEAD],ax
mov bx,10
mov di,ax
add di,1000h
mov es:[di],bx
pop ax
sub ax,2
mov es:[Z_TAIL],ax
mov bx,6
mov di,ax
add di,1000h
mov es:[di],bx
mov ax,S_TAILL
mov es:[Z_TAILL],ax
mov ax,10
mov es:[Z_FOOD],ax
ret
skrol:
push ax
mov dx,10h
in al,dx
mov bl,al
inc dx
in al,dx
mov bh,al
mov ax,es:[Z_HEADDIR]
shl al,4
test al,16
jz s1
dec bh
s1:
test al,128
jz s2
dec bl
s2:
test al,64
jz s3
inc bh
s3:
test al,32
jz s4
inc bl
s4:
mov al,bh
out dx,al
dec dx
mov al,bl
out dx,al
pop ax
ret
levels:
include levels\l00.inc
include levels\l01.inc
include levels\l02.inc
include levels\l03.inc
include levels\l04.inc
include levels\l05.inc
include levels\l06.inc
include levels\l07.inc
include levels\l08.inc
include levels\l09.inc
include levels\l10.inc
include levels\l11.inc
include levels\l12.inc
include levels\l13.inc
include levels\l14.inc
include levels\l15.inc
include levels\l16.inc
include levels\l17.inc
include levels\l18.inc
include levels\l19.inc
print:
;al=x
;ah=y
;cl=znak
;ch=pal
push cx
xor ch,ch
sub cx,65
add cx,cx
add cx,257
pop bx
xor bl,bl
add bx,bx ;bity
or cx,bx
push ax
xor al,al
shr ax,2
pop bx
xor bh,bh
add bx,bx
or ax,bx
mov di,800h
add di,ax
xor bx,bx
push bx
pop es
mov es:[di],cx
add di,2
inc cx
mov es:[di],cx
add di,64-2
add cx,79
mov es:[di],cx
add di,2
inc cx
mov es:[di],cx
ret
print2:
;al=x
;ah=y
;cl=znak
;ch=pal
push cx
xor ch,ch
sub cx,65
add cx,cx
add cx,257
pop bx
xor bl,bl
add bx,bx ;bity
or cx,bx
push ax
xor al,al
shr ax,2
pop bx
xor bh,bh
add bx,bx
or ax,bx
mov di,1000h
add di,ax
xor bx,bx
push bx
pop es
mov es:[di],cx
add di,2
inc cx
mov es:[di],cx
add di,64-2
add cx,79
mov es:[di],cx
add di,2
inc cx
mov es:[di],cx
ret
print3:
;al=x
;ah=y
;cl=znak
;ch=pal
push cx
xor ch,ch
sub cx,65
add cx,cx
add cx,S_POCZO
pop bx
xor bl,bl
add bx,bx ;bity
or cx,bx
push ax
xor al,al
shr ax,2
pop bx
xor bh,bh
add bx,bx
or ax,bx
mov di,1000h
add di,ax
xor bx,bx
push bx
pop es
mov es:[di],cx
add di,2
inc cx
mov es:[di],cx
add di,64-2
add cx,79
mov es:[di],cx
add di,2
inc cx
mov es:[di],cx
ret
menu:
;clear screen
;load new tiles
;display texts
levelinfo:
push ax
call blackpal
mov si,offset zigzag
xor ax,ax
mov es,ax
mov di,4000h
mov ax,8000h
mov ds,ax
xor ax,ax
out 10h,al
out 11h,al
out 12h,al
out 13h,al
cld
mov cx,16
rep stosw ;1st = 0
mov ax,1111h
mov cx,16
rep stosw ;2nd = 1
mov cx,16*8
rep movsw ; zigzak
mov al,1
out 0,al
xor al,al
out 1,al
mov al,21h
out 7,al ; scrloc 800,1000
mov si,offset mapa1_info
mov di,800h
mov cx,1024
rep movsw
mov si,offset fonty
mov di,4000h+256*32
xor ax,ax
mov cx,16
rep stosw
mov cx,512*16
rep movsw
;al=x
;ah=y
;cl=znak
;ch=pal
mov cl,'L'
mov ch,1
mov ax,0706h
call print
mov cl,'E'
mov ch,1
mov ax,0708h
call print
mov cl,'V'
mov ch,1
mov ax,070ah
call print
mov cl,'E'
mov ch,1
mov ax,070ch
call print
mov cl,'L'
mov ch,1
mov ax,070eh
call print
mov si,offset tabasci
mov bx,8000h
mov ds,bx
pop ax
push ax
add ax,ax
add si,ax
mov dx,ds:[si]
push dx
mov cl,dl
add cl,43
mov ch,1
mov ax,0712h
call print
pop dx
mov cl,dh
add cl,43
mov ch,1
mov ax,0714h
call print
pop ax
mov si,offset passwords
add ax,ax
add ax,ax
add si,ax
mov bx,8000h
mov ds,bx
push ds
push si
mov cl,ds:[si]
mov ch,2
mov ax,0a0ah
call print
pop si
pop ds
inc si
push ds
push si
mov cl,ds:[si]
mov ch,2
mov ax,0a0ch
call print
pop si
pop ds
inc si
push ds
push si
mov cl,ds:[si]
mov ch,2
mov ax,0a0eh
call print
pop si
pop ds
inc si
mov cl,ds:[si]
mov ch,2
mov ax,0a10h
call print
mov ax,offset paleta_info
call setpal
xor ax,ax
mov es,ax
mov ax,8000h
mov ds,ax
xor bx,bx ;petla scrolla
lo11:
push bx
mov al,100
call wait_linia
call wait_vbl
mov al,100
call wait_linia
call wait_vbl
pop bx
mov ah,bl
xor al,al
mov si,offset zigzag
add si,ax
mov di,4040h
mov cx,128
rep movsw
inc bx
and bx,31 ;max frames
push es
push ds
push bx
call keypad
xor ax,ax
mov es,ax
mov al,es:[Z_KEYAND]
and al,14
pop bx
pop ds
pop es