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journey.asm
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#include "ti86.inc"
.org _asm_exec_ram
level = _textShadow
xcoord = _textShadow+1
ycoord = _textShadow+2
sxcoord = _textShadow+3
sycoord = _textShadow+4
_ConvOP = $5577
lastk = _textShadow+5
nop
jp ProgStart
.dw 0
.dw ShellTitle
ShellTitle:
.db "Journey",0
ProgStart:
call _clrLCD
call _runindicoff
xor a
ld (sxcoord),a
ld a,32
ld (sycoord),a
ld a,K_RIGHT
ld (lastk),a
ld a,1
ld (level),a
ld a,34
ld (ycoord),a
ld a,10
ld (xcoord),a
ld a,255
lines:
inc a
ld b,a
ld c,34
push af
call pixel_on
pop af
cp 10
jr nz,lines
ld a,255
line2:
inc a
ld c,22
push af
ld a,(level)
add a,22
ld c,a
pop af
ld b,a
push af
call pixel_on
pop af
cp 10
jr nz,line2
generateloop:
ld a,(xcoord)
inc a
ld (xcoord),a
rand:
xor a
call _setXXop1
call _random
ld a,10
call _setXXop2
call _FPMULT
call _FPMULT
call _ConvOP
and 1
cp 0
jr z,cond1
jr cond2
cond1:
ld a,(ycoord)
inc a
cp 63
call z,atoomuch
ld (ycoord),a
jr putpixels
cond2:
ld a,(level)
ld b,a
ld a,(ycoord)
dec a
ld c,a
add a,b
sub 11
call z,atoolow
ld a,c
ld (ycoord),a
putpixels:
ld a,(xcoord)
ld b,a
ld a,(ycoord)
ld c,a
call pixel_on
ld a,(level)
ld b,a
ld a,(ycoord)
sub 12
add a,b
ld c,a
ld a,(xcoord)
ld b,a
call pixel_on
ld a,(xcoord)
cp 127
jr z,getcmd
jp generateloop
atoomuch:
dec a
ret
atoolow:
inc c
ret
getcmd:
call _getky
keypress:
cp K_UP
jr z,moveup
cp K_DOWN
jr z,movedown
cp K_LEFT
jr z,moveleft
cp K_RIGHT
jr z,moveright
cp K_EXIT
ret z
ld a,(lastk)
jr keypress
moveup:
ld (lastk),a
ld a,(sycoord)
dec a
ld (sycoord),a
jr move
moveleft:
ld (lastk),a
ld a,(sxcoord)
dec a
ld (sxcoord),a
jr move
moveright:
ld (lastk),a
ld a,(sxcoord)
inc a
ld (sxcoord),a
jr move
movedown:
ld (lastk),a
ld a,(sycoord)
inc a
ld (sycoord),a
move:
ld a,(sxcoord)
ld b,a
ld a,(sycoord)
ld c,a
push bc
call pixeltest
pop bc
jp nz,_clrLCD
push bc
call pixel_on
pop bc
ld a,b
cp 60
jr nc,scrollleft
delay:
ld a,65
ld e,a
dela:
dec e
jr nz,dela
dec a
jr nz,dela
jp getcmd
pixeltest:
call FindPixel
and (hl)
ret
pixel_on:
call FindPixel
or (hl)
ld (hl),a
ret
#include "findpixel.asm"
scrollleft:
di
ld hl,0
ld bc,1024
loopleft:
dec hl
ex af,af'
rl (hl)
ex af,af'
dec c
jp nz,loopleft
dec b
jp nz,loopleft
ei
clean:
ld hl,$fc0f-16
ld b,64
loop:
ld a,%11111110
ld de,16
add hl,de
and (hl)
ld (hl),a
djnz loop
ld a,(xcoord)
dec a
ld (xcoord),a
ld a,(sxcoord)
dec a
ld (sxcoord),a
jp generateloop
.end