Difference between revisions of "Light pen driver"
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(Created page with "<pre> ; z80dasm 1.2.0 ; command line: z80dasm -g0x9c40 -l MCPEN.BIN org 09c40h sub_9c40h: jr $+8 nop add a,003h ld de,(la250h)...") |
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| Line 55: | Line 55: | ||
ld b,000h | ld b,000h | ||
or d | or d | ||
| − | call 0bd19h | + | |
| + | call 0bd19h ;; mc wait flyback | ||
di | di | ||
ld bc,0f40eh | ld bc,0f40eh | ||
| Line 71: | Line 72: | ||
out (c),a | out (c),a | ||
push bc | push bc | ||
| − | ld bc,0f649h | + | ld bc,0f649h ;; select keyboard line 9 (joystick) |
out (c),c | out (c),c | ||
out (c),c | out (c),c | ||
ld b,0f4h | ld b,0f4h | ||
| − | ld hl,0fa66h | + | |
| + | ;; loop reading joystick until input seen or timeout | ||
| + | |||
| + | ld hl,0fa66h ;; timeout. | ||
l9ca8h: | l9ca8h: | ||
in a,(c) | in a,(c) | ||
| − | cp 0fdh | + | cp 0fdh ;; 11111101. Bits are '1' if 'no press', but '0' if pressed. checking joy 0 down. |
jr z,l9cb9h | jr z,l9cb9h | ||
sub_9caeh: | sub_9caeh: | ||
| Line 85: | Line 89: | ||
inc h | inc h | ||
jr nz,l9ca8h | jr nz,l9ca8h | ||
| + | |||
ld hl,0ffffh | ld hl,0ffffh | ||
jr l9cbdh | jr l9cbdh | ||
| Line 100: | Line 105: | ||
ei | ei | ||
ret | ret | ||
| + | |||
call 09da6h | call 09da6h | ||
call sub_9ce4h | call sub_9ce4h | ||
call 09db2h | call 09db2h | ||
ret | ret | ||
| + | |||
ld a,h | ld a,h | ||
ld c,l | ld c,l | ||
| Line 156: | Line 163: | ||
ld a,000h | ld a,000h | ||
ld bc,01a1ah | ld bc,01a1ah | ||
| − | call 0bc32h | + | call 0bc32h ;; scr set ink |
call 0bc14h | call 0bc14h | ||
ld a,001h | ld a,001h | ||
| Line 173: | Line 180: | ||
ld a,001h | ld a,001h | ||
ld bc,01a1ah | ld bc,01a1ah | ||
| − | call 0bc32h | + | call 0bc32h ;; scr set ink |
ld a,000h | ld a,000h | ||
ld bc,00000h | ld bc,00000h | ||
| − | call 0bc32h | + | call 0bc32h ;; scr set ink |
ld b,00ah | ld b,00ah | ||
| − | call 0bd19h | + | call 0bd19h ;; mc wait flyback |
djnz $-4 | djnz $-4 | ||
ld b,020h | ld b,020h | ||
| Line 346: | Line 353: | ||
jr nz,l9ea9h | jr nz,l9ea9h | ||
ld a,02fh | ld a,02fh | ||
| − | call 0bb1eh | + | call 0bb1eh ;; km test key |
ret z | ret z | ||
jp l9e52h | jp l9e52h | ||
| Line 352: | Line 359: | ||
call 09eb7h | call 09eb7h | ||
ld a,02fh | ld a,02fh | ||
| − | call 0bb1eh | + | call 0bb1eh ;; km test key |
ret z | ret z | ||
ld hl,(0a41ch) | ld hl,(0a41ch) | ||
Revision as of 11:53, 12 July 2025
; z80dasm 1.2.0
; command line: z80dasm -g0x9c40 -l MCPEN.BIN
org 09c40h
sub_9c40h:
jr $+8
nop
add a,003h
ld de,(la250h)
ld (la248h+1),hl
ld (05a94h),de
ret
or b
ld (bc),a
ld c,b
ld (bc),a
cp (hl)
nop
jr nz,l9c5ah
inc b
l9c5ah:
jr nz,l9c5dh
cp h
l9c5dh:
ld a,(de)
l9c5eh:
inc c
jr z,l9c6eh
nop
nop
ld d,h
or c
add hl,hl
ld bc,020a1h
dec c
nop
nop
ld d,h
or c
l9c6eh:
xor 019h
add hl,de
jr nz,l9c5eh
jr nz,$+15
nop
nop
ld d,h
or c
rst 28h
add hl,de
ld a,(de)
nop
ld b,000h
or d
call 0bd19h ;; mc wait flyback
di
ld bc,0f40eh
out (c),c
ld b,0f6h
in a,(c)
and 030h
ld c,a
or 0c0h
out (c),a
sub_9c94h:
out (c),a
inc b
ld a,092h
out (c),a
push bc
ld bc,0f649h ;; select keyboard line 9 (joystick)
out (c),c
out (c),c
ld b,0f4h
;; loop reading joystick until input seen or timeout
ld hl,0fa66h ;; timeout.
l9ca8h:
in a,(c)
cp 0fdh ;; 11111101. Bits are '1' if 'no press', but '0' if pressed. checking joy 0 down.
jr z,l9cb9h
sub_9caeh:
inc l
jr nz,l9ca8h
inc h
jr nz,l9ca8h
ld hl,0ffffh
jr l9cbdh
l9cb9h:
ld de,00420h
add hl,de
l9cbdh:
ld (0a410h),hl
pop bc
sub_9cc1h:
ld a,082h
out (c),a
dec b
out (c),c
ei
ret
call 09da6h
call sub_9ce4h
call 09db2h
ret
ld a,h
ld c,l
ld b,010h
ld hl,00000h
l9cdbh:
rl c
rla
adc hl,hl
sbc hl,de
jr nc,l9ce5h
sub_9ce4h:
add hl,de
l9ce5h:
ccf
djnz l9cdbh
rl c
rla
ld h,a
ld l,c
ret
ld a,l
ld c,h
ld b,010h
ld hl,00000h
l9cf5h:
srl c
rra
jr nc,l9cfbh
add hl,de
l9cfbh:
ex de,hl
add hl,hl
ex de,hl
djnz l9cf5h
ret
call sub_9c40h
ld a,0ffh
cp h
ret z
ld de,00002h
call sub_9c94h
ld de,00064h
call sub_9caeh
ld de,00084h
call sub_9c94h
ex de,hl
ld hl,0018fh
sbc hl,de
ld (0a410h),hl
ret
ld a,000h
ld bc,01a1ah
call 0bc32h ;; scr set ink
call 0bc14h
ld a,001h
call 0bbdeh
call sub_9cc1h
ld a,0ffh
cp h
ret z
ld de,0000ah
and a
sbc hl,de
jr nc,$+3
ld hl,00000h
ld de,00000h
call 0bbc0h
ld a,001h
ld bc,01a1ah
call 0bc32h ;; scr set ink
ld a,000h
ld bc,00000h
call 0bc32h ;; scr set ink
ld b,00ah
call 0bd19h ;; mc wait flyback
djnz $-4
ld b,020h
l9d65h:
push bc
call 09d35h
call sub_9c40h
pop bc
ld a,0ffh
cp h
jr nz,l9d91h
djnz l9d65h
ret
ld bc,(0a418h)
l9d79h:
push bc
ld de,00000h
ld hl,00014h
call 0bbf9h
ld de,(0a416h)
ld hl,0ffech
call 0bbc3h
pop bc
djnz l9d79h
ret
l9d91h:
ld de,0ffech
ld hl,00000h
call 0bbc3h
l9d9ah:
ld a,000h
call 0bbdeh
call 09d35h
ld a,001h
call 0bbdeh
ld de,0ffech
ld hl,00000h
call 0bbc3h
ld bc,(0a420h)
l9db4h:
push bc
call sub_9cc1h
ld a,0ffh
cp h
jr nz,l9ddah
ld de,00000h
ld hl,00014h
call 0bbf9h
ld de,(0a416h)
ld hl,0ffech
call 0bbc3h
pop bc
djnz l9db4h
ld hl,0ffffh
ld (0a410h),hl
ret
l9ddah:
pop bc
ld (0a410h),hl
call 0bbc6h
ld (0a412h),de
ret
sub_9de6h:
ld bc,03fd0h
ld hl,0c000h
ld de,05bfeh
ldir
ret
ld bc,03fd0h
ld hl,05bfeh
ld de,0c000h
ldir
ret
push hl
push de
call 09e08h
ld (0a414h),hl
ld de,05398h
ld b,004h
l9e0bh:
push bc
ld hl,(0a414h)
ld c,b
ld b,000h
inc hl
and a
sbc hl,bc
ld b,00bh
l9e18h:
ld a,(hl)
ld (de),a
inc de
call 0bc29h
djnz l9e18h
pop bc
djnz l9e0bh
pop de
pop hl
ret
push hl
push de
ld de,05398h
ld b,004h
l9e2dh:
push bc
ld hl,(0a414h)
ld c,b
ld b,000h
inc hl
and a
sbc hl,bc
ld b,00bh
l9e3ah:
ld a,(de)
ld (hl),a
inc de
call 0bc29h
djnz l9e3ah
pop bc
djnz l9e2dh
pop de
pop hl
ret
push de
ld de,00002h
call sub_9c94h
pop de
push hl
ex de,hl
l9e52h:
ld de,(0a416h)
call sub_9c94h
ex de,hl
pop hl
call 0bc1dh
ret
call 09c8ah
ld hl,(0a418h)
ld (0a420h),hl
ld hl,(0a410h)
ld a,0ffh
cp h
ret z
ld (0a41ch),hl
ld de,(0a412h)
ld (0a41ah),de
l9e7ah:
ld de,0000ah
and a
sbc hl,de
jr nc,l9e85h
ld hl,00000h
l9e85h:
push hl
ld hl,(0a412h)
add hl,de
ex de,hl
pop hl
call 09dbeh
call 0bbc0h
call 09ed2h
call sub_9de6h
sub_9e98h:
ld hl,(0a410h)
ld a,0ffh
cp h
jr nz,l9ea9h
ld a,02fh
call 0bb1eh ;; km test key
ret z
jp l9e52h
l9ea9h:
call 09eb7h
ld a,02fh
call 0bb1eh ;; km test key
ret z
ld hl,(0a41ch)
ld de,(0a41ah)
call 0bbc0h
ld hl,(0a410h)
ld de,(0a412h)
ld a,(0a41eh)
call 0bbdeh
ld (0a41ch),hl
ld (0a41ah),de
call 0bbf6h
ld hl,(0a410h)
jr l9e7ah
ld de,0ffech
ld hl,00000h
call 0bbc3h
ld a,001h
call 0bbdeh
call 09d35h
ld a,000h
call 0bbdeh
call sub_9cc1h
ld a,0ffh
cp h
ret nz
l9ef5h:
pop de
ret
ld hl,(0a41ah)
ld de,(0a412h)
l9efeh:
and a
sbc hl,de
ret z
jp p,09ecbh
ld hl,l9f15h
jp 09eceh
ld hl,09ed2h
l9f0eh:
ld (l9e52h+1),hl
ret
call sub_9e98h
l9f15h:
ld de,0ffech
ld hl,00000h
call 0bbc3h
ld bc,(0a420h)
l9f22h:
push bc
ld de,00000h
ld hl,00014h
call 0bbf9h
call sub_9cc1h
ld a,0ffh
cp h
jp nz,l9efeh
ld hl,(0a422h)
ld (0a410h),hl
jp l9d9ah
ld (0a422h),hl
ld de,(0a416h)
ld hl,0ffech
call 0bbc3h
pop bc
djnz l9f22h
ld hl,0ffffh
ld (0a410h),hl
ret
call sub_9e98h
ld bc,(0a420h)
l9f5ch:
push bc
ld de,00000h
ld hl,00014h
call 0bbf9h
call sub_9cc1h
ld a,0ffh
cp h
jp z,l9ef5h
ld (0a422h),hl
ld de,(0a416h)
ld hl,00000h
and a
sbc hl,de
push hl
pop de
ld hl,0ffech
call 0bbc3h
pop bc
djnz l9f5ch
ld hl,00000h
ld de,00014h
call 0bbc3h
jp l9f0eh
nop
nop
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nop
nop
nop
nop
nop
nop
nop
nop
la050h:
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
ld a,013h
ld (la124h),a
ld a,00eh
ld (0a0e2h),a
ld a,(la133h)
bit 1,a
jr z,la083h
ld a,000h
ld (la124h),a
ld a,007h
ld (0a0e2h),a
la083h:
call 0bd28h
ld de,00000h
ld hl,00000h
ld (0a12dh),de
ld a,000h
ld (0a12ch),a
ld de,(0a12dh)
call sub_a10dh
call 0bbf0h
ld de,00001h
call sub_a11dh
ld de,00002h
call sub_a11dh
ld de,00004h
call sub_a11dh
ld de,00008h
call sub_a11dh
ld de,00010h
call sub_a11dh
ld de,00020h
call sub_a11dh
ld de,00040h
call sub_a0ffh
la0c9h:
call 0bd2eh
jr c,la0c9h
call 0bd28h
ld a,01bh
call 0bd2bh
ld a,04bh
call 0bd2bh
ld a,000h
call 0bd2bh
ld a,(la133h)
bit 0,a
jr z,la0f4h
ld a,002h
call 0bd2bh
ld a,(0a12ch)
call 0bd2bh
jr la0f9h
la0f4h:
ld a,001h
call 0bd2bh
la0f9h:
ld a,(0a12ch)
call 0bd2bh
sub_a0ffh:
call sub_a115h
inc hl
inc hl
call sub_a10dh
ld a,h
cp 001h
jp nz,la050h
sub_a10dh:
ld a,l
cp 090h
jp nz,la050h
ld a,00ah
sub_a115h:
call 0bd2bh
ld a,02fh
call 0bb1eh
sub_a11dh:
ret nz
ld hl,(0a12dh)
ld de,0000eh
la124h:
add hl,de
ld (0a12dh),hl
ld hl,00000h
call sub_a10dh
ld de,(0a12dh)
ld a,d
la133h:
cp 002h
jp nz,la050h
ld a,e
cp 084h
jp nz,la050h
ret
ld b,a
call 0bb99h
cp b
ret z
ld hl,(0a12ch)
add hl,de
ld (0a12ch),hl
ret
ld (0a12fh),hl
ld (0a131h),de
ret
ld hl,(0a12fh)
ld de,(0a131h)
ret
call sub_a0ffh
call sub_a115h
inc de
inc de
call sub_a10dh
call 0bbf0h
ret
nop
add a,h
ld (bc),a
nop
nop
ld c,000h
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
la18bh:
nop
nop
nop
nop
nop
nop
nop
nop
nop
call 0bc11h
cp 000h
jr nz,la19dh
ld b,004h
la19dh:
cp 001h
jr nz,la1a3h
ld b,002h
la1a3h:
cp 002h
jr nz,la1a9h
ld b,001h
la1a9h:
ld a,b
la1aah:
ld (0a254h),a
call 0bbc6h
ld (la250h),hl
ld (la250h+2),de
la1b7h:
call 0bb99h
ld (la1f9h),a
ld bc,00000h
ld (0a24ch),bc
ld (0a24eh),bc
call 0a210h
ld a,02fh
call 0bb1eh
ret nz
ld hl,(0a24eh)
inc hl
inc hl
ld a,004h
cp h
jr nz,la1deh
ld hl,00000h
la1deh:
ld (0a24eh),hl
ld bc,05398h
add hl,bc
ld (la1aah),hl
ld de,(055e0h)
ld hl,(0a24eh)
sub_a1efh:
ld bc,057e4h
add hl,bc
ld (la1b7h),hl
ld hl,(05a2ch)
la1f9h:
ld (la257h),hl
ld (0a255h),de
ld bc,00000h
ld a,(0a254h)
ld c,a
ex de,hl
add hl,bc
ex de,hl
call sub_a1efh
and a
ex de,hl
sbc hl,bc
ex de,hl
call sub_a1efh
inc hl
inc hl
call sub_a1efh
dec hl
dec hl
call sub_a1efh
ld hl,(0a24eh)
ld de,(0a24ch)
inc hl
inc hl
and a
sbc hl,de
ret z
jp la18bh
push de
push hl
push bc
call 0bbf0h
pop bc
pop hl
la237h:
pop de
cp 000h
jr nz,la248h
ld (la250h),hl
ld (la250h+2),de
push bc
call 0a210h
pop bc
la248h:
ld hl,(la257h)
ld de,(0a255h)
ret
la250h:
ld hl,(la250h)
ld de,(la250h+2)
la257h:
call 0bbeah
ld hl,(0a24ch)
inc hl
inc hl
ld a,004h
cp h
jr nz,la267h
ld hl,00000h
la267h:
ld (0a24ch),hl
ld bc,05398h
add hl,bc
ld de,(la250h+2)
ld (la237h),hl
ld (05648h),de
ld hl,(0a24ch)
ld bc,057e4h
add hl,bc
ld de,(la250h)
ld (la248h+1),hl
ld (05a94h),de
ret
or b
ld (bc),a
ld c,b
ld (bc),a
cp (hl)
nop
jr nz,la295h
inc b
la295h:
jr nz,$+3
cp h
end
