mirror of
https://github.com/cc65/cc65.git
synced 2024-08-17 03:29:15 +00:00
31 lines
520 B
ArmAsm
31 lines
520 B
ArmAsm
; void __fastcall__ psg_outb (unsigned char b);
|
|
; void __fastcall__ psg_delay (unsigned char b);
|
|
; void psg_silence (void);
|
|
|
|
|
|
.export _psg_outb, _psg_silence, _psg_delay
|
|
|
|
.include "creativision.inc"
|
|
|
|
|
|
;* Let BIOS output the value.
|
|
_psg_outb := BIOS_POKE_PSG
|
|
|
|
|
|
_psg_silence := BIOS_QUIET_PSG
|
|
|
|
|
|
_psg_delay:
|
|
tay
|
|
l1: lda #200
|
|
l2: sbc #1
|
|
bne l2
|
|
|
|
lda #200
|
|
l3: sbc #1
|
|
bne l3
|
|
|
|
dey
|
|
bne l1
|
|
rts
|