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Copy pathgfx-coproc-drv.asm
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gfx-coproc-drv.asm
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BasicUpstart2(main_entry)
#import "globals.asm"
#import "pottendos_utils.asm"
#define CLEAR
//.label coproc = $c000;
.label coproc = $e0;
.const CLINE = 1
.const CCIRCLE = 2
.const CCIRCLE_EL = 3
.const CEXIT = $ff
.const CNOP = 0
tmp1: .byte $00
tmp2: .word $0000
ctrl_save: .byte $00
.macro wait4cr(sync)
{
!w:
sei
lda $01
ora #%00000111
sta $01
inc $d000
dec $d000
inc $d000
dec $d000
inc $d000
dec $d000
inc $d000
dec $d000
and #%11111100
sta $01
cli
lda coproc
beq !w-
#if BLA
!w:
inc $d000
dec $d000
inc $d000
dec $d000
inc $d000
dec $d000
inc $d000
dec $d000
lda coproc
beq !w-
!:
txa
pha
!w:
ldx #3
!: inc VIC.BoC
dec VIC.BoC
dex
bne !-
lda coproc
beq !w-
pla
tax
#endif
}
do_lines:
// lines
poke8_(coproc+10, 20) // iterator counter
poke16_(coproc+3, 10)
poke8_(coproc+5, 0)
poke16_(coproc+6, 310)
poke8_(coproc+8, 199)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, 1)
poke8_(coproc+1, CLINE)
wait4cr(0)
poke8_(coproc, 0)
poke8_(coproc+2, 0)
poke8_(coproc+1, CLINE)
wait4cr(1)
inc coproc+3
inc coproc+3
inc coproc+3
dec coproc+6
dec coproc+6
dec coproc+6
dec coproc+10
beq !+
jmp !again-
!:
rts
do_circles:
// lines
poke8_(coproc+10, 20) // iterator counter
poke16_(coproc+3, 10)
poke8_(coproc+5, 100)
poke16_(coproc+6, 99)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, 1)
poke8_(coproc+1, CCIRCLE)
wait4cr(0)
#if CLEAR
poke8_(coproc, 0)
poke8_(coproc+2, $61)
poke8_(coproc+1, CCIRCLE)
wait4cr(1)
#endif
inc coproc+3
inc coproc+3
inc coproc+3
dec coproc+6
dec coproc+6
dec coproc+10
beq !+
jmp !again-
!:
rts
do_fcircles:
// circles filled
poke8_(coproc+10, 24) // iterator counter
poke16_(coproc+3, 310)
poke8_(coproc+5, 100)
poke16_(coproc+6, 99)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, $81) // #%1xxxxxxx signals filling
poke8_(coproc+1, CCIRCLE)
wait4cr(0)
#if CLEAR
poke8_(coproc, 0)
poke8_(coproc+2, $E1)
poke8_(coproc+1, CCIRCLE)
wait4cr(1)
#endif
sbc16(coproc+3, 3, coproc+3);
dec coproc+6
dec coproc+6
dec coproc+10
beq !+
jmp !again-
!:
rts
do_felcircles:
// circles filled
poke8_(coproc+10, 50) // iterator counter
poke16_(coproc+3, 0)
poke16_(coproc+5, 0)
poke16_(coproc+7, 0)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, $E1) // #%1xxxxxxx signals filling
poke8_(coproc+1, CCIRCLE_EL)
wait4cr(0)
#if CLEAR
poke8_(coproc, 0)
poke8_(coproc+2, $E1)
poke8_(coproc+1, CCIRCLE_EL)
wait4cr(1)
#endif
adc16(coproc+3, 5, coproc+3);
adc16(coproc+5, 3, coproc+5);
adc16(coproc+7, 1, coproc+7);
dec coproc+10
beq !+
jmp !again-
!:
rts
do_lines2:
// lines
poke8_(coproc+10, 8) // iterator counter
poke16_(coproc+3, 256)
poke8_(coproc+5, 0)
poke16_(coproc+6, 256)
poke8_(coproc+8, 199)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, 1)
poke8_(coproc+1, CLINE)
wait4cr(0)
poke8_(coproc, 0)
poke8_(coproc+2, 0)
poke8_(coproc+1, CLINE)
wait4cr(1)
inc16(coproc+3)
inc16(coproc+6)
dec coproc+10
beq !+
jmp !again-
!:
rts
do_tiny_circles:
// circles filled
poke8_(coproc+10, 8) // iterator counter
poke16_(coproc+3, 8)
poke8_(coproc+5, 100)
poke16_(coproc+6, 1)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, $81) // #%1xxxxxxx signals filling
poke8_(coproc+1, CCIRCLE)
wait4cr(0)
#if CLEAR
poke8_(coproc, 0)
poke8_(coproc+2, $E1)
poke8_(coproc+1, CCIRCLE)
wait4cr(1)
#endif
adc16(coproc+3, 4, coproc+3)
adc8(coproc+5, 1, coproc+5)
//adc16(coproc+6, 1, coproc+6)
dec coproc+10
beq !out+
jmp !again-
!out:
rts
do_tiny_lines:
poke8_(coproc+10, 16) // iterator counter
poke16_(coproc+3, 0)
poke8_(coproc+5, 100)
poke16_(coproc+6, 1)
poke8_(coproc+8, 100)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, 1)
poke8_(coproc+1, CLINE)
wait4cr(0)
poke8_(coproc, 0)
poke8_(coproc+2, 0)
poke8_(coproc+1, CLINE)
wait4cr(1)
inc coproc+3
inc coproc+6
sbc8(coproc+5, 1, coproc+5)
sbc8(coproc+8, 1, coproc+8)
dec coproc+10
beq !+
jmp !again-
!:
rts
do_tiny_lines2:
poke8_(coproc+10, 16) // iterator counter
poke16_(coproc+3, 0)
poke8_(coproc+5, 0)
poke16_(coproc+6, 0)
poke8_(coproc+8, 199)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, $61)
poke8_(coproc+1, CLINE)
wait4cr(0)
poke8_(coproc, 0)
poke8_(coproc+2, $61)
poke8_(coproc+1, CLINE)
wait4cr(1)
inc coproc+3
inc coproc+6
dec coproc+10
beq !+
jmp !again-
!:
rts
do_lines3:
poke16_(coproc+10, 320) // iterator counter
poke16_(coproc+3, 319)
poke8_(coproc+5, 0)
poke16_(coproc+6, 0)
poke8_(coproc+8, 199)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, 1)
poke8_(coproc+1, CLINE)
wait4cr(0)
poke8_(coproc, 0)
poke8_(coproc+2, 0)
poke8_(coproc+1, CLINE)
wait4cr(1)
dec16(coproc+3)
inc16(coproc+6)
dec16(coproc+10)
dec16(coproc+10)
cmp16_(coproc+10, 0)
beq !+
jmp !again-
!:
rts
do_lines4:
poke16_(coproc+10, 320) // iterator counter
poke16_(coproc+3, 0)
poke8_(coproc+5, 0)
poke16_(coproc+6, 319)
poke8_(coproc+8, 199)
!again:
poke8_(coproc, 0)
poke8_(coproc+2, %01000001)
poke8_(coproc+1, CLINE)
wait4cr(0)
//poke8_(coproc, 0)
//poke8_(coproc+2, 0)
//poke8_(coproc+1, CLINE)
//wait4cr(1)
inc16(coproc+3)
inc16(coproc+3)
dec16(coproc+6)
dec16(coproc+6)
dec16(coproc+10)
dec16(coproc+10)
cmp16_(coproc+10, 0)
beq !+
jmp !again-
!:
rts
// -------------------------------------------
loop_col:
poke16_(tmp2, $3fff)
!:
poke8($4000, tmp2)
inc VIC.BoC
dec16(tmp2)
beq outx2
jmp !-
outx2:
rts
nmiisrab:
save_regs()
inc $4000 + 8
poke8_(CIA2.ICR, $ff) // stop all interrupts
ldy CIA2.ICR
restore_regs()
cli
rti
irqisrcd:
pha
lda $d019
ora #%10000000
sta $d019
poke8_(CIA1.ICR, $7f) // stop all interrupts
lda CIA1.ICR
inc $4000 + 320 * 1
pla
rti
nmiisref:
pha
inc $4000 + 8 * 5 + 320 * 3
lda $01
pha
ora #%000000111
sta $01
poke8_(CIA1.ICR, $7f) // stop all interrupts to avoid constant NMIs
lda CIA1.ICR // acknowledge
pla
sta $01
pla
rti
main_entry:
memset_($4000, $0, 8000)
memset_($7c00, $10, $3f8)
memset_($d800, $0, 1000)
clearbits(CIA2.base, %11111100) // select VIC bank $4000-$7FFF
setbits(CIA2.base, %00000010)
lda VIC.MEM // move VIC screen to base + $0000
sta tmp1
and #%00001111
ora #%11110000 // screen to base + $3C00
sta VIC.MEM
setbits(VIC.CR1, %00100000) // bit 5 -> HiRes
poke16_($fffe, nmiisref) // ensure vector if kernal is switched off
sei
lda $01
sta ctrl_save
clearbits($01, %11111000)
setbits($01, %00000100)
cli
jsr do_lines4
jsr do_felcircles
jsr do_tiny_lines2
jsr do_tiny_circles
jsr do_circles
jsr do_fcircles
jsr do_lines3
jsr do_lines2
jsr do_tiny_lines
jsr do_lines
sei
lda ctrl_save
sta $01
poke16_($fffe, STD.NMI)
poke8_(CIA1.ICR, $ff) // enable all interrupts again
cli
poke8_(VIC.BoC, 14)
setbits(CIA2.base, %00000011)
lda tmp1
//and #%11110000
//ora VIC.MEM
sta VIC.MEM
clearbits(VIC.CR1, %11011111)
//clearbits(VIC.CR2, %11101111)
rts