cc65/libsrc/creativision/psg.s

; 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
Fixed the creativision function prototypes. Added const to a pointer parameter. 2021-05-29 08:37:38 -04:00			`; void __fastcall__ psg_outb (unsigned char b);`
Fixed the Creativision library's bios_playsound(). It was disabling interrupts permanently. 2021-05-14 19:12:59 -04:00			`; void __fastcall__ psg_delay (unsigned char b);`
Fixed the creativision function prototypes. Added const to a pointer parameter. 2021-05-29 08:37:38 -04:00			`; void psg_silence (void);`
Initial Creativision Import 2013-12-05 11:40:44 +00:00
Fixed the Creativision library's bios_playsound(). It was disabling interrupts permanently. 2021-05-14 19:12:59 -04:00
			`.export _psg_outb, _psg_silence, _psg_delay`

Cleanups for Creativision. 2017-02-01 19:46:04 +01:00			`.include "creativision.inc"`

Fixed the Creativision library's bios_playsound(). It was disabling interrupts permanently. 2021-05-14 19:12:59 -04:00
Moved Creativision's playsound() into a separate file. It won't waste space in a cartridge if it isn't used. 2021-05-30 13:30:08 -04:00			`;* Let BIOS output the value.`
			`_psg_outb := BIOS_POKE_PSG`
Initial Creativision Import 2013-12-05 11:40:44 +00:00
Cleanups for Creativision. 2017-02-01 19:46:04 +01:00
Moved Creativision's playsound() into a separate file. It won't waste space in a cartridge if it isn't used. 2021-05-30 13:30:08 -04:00			`_psg_silence := BIOS_QUIET_PSG`
Cleanups for Creativision. 2017-02-01 19:46:04 +01:00

Initial Creativision Import 2013-12-05 11:40:44 +00:00			`_psg_delay:`
Cleanups for Creativision. 2017-02-01 19:46:04 +01:00			`tay`
Fixed the Creativision library's bios_playsound(). It was disabling interrupts permanently. 2021-05-14 19:12:59 -04:00			`l1: lda #200`
			`l2: sbc #1`
			`bne l2`
Cleanups for Creativision. 2017-02-01 19:46:04 +01:00
Fixed the Creativision library's bios_playsound(). It was disabling interrupts permanently. 2021-05-14 19:12:59 -04:00			`lda #200`
			`l3: sbc #1`
			`bne l3`
Cleanups for Creativision. 2017-02-01 19:46:04 +01:00
			`dey`
Fixed the Creativision library's bios_playsound(). It was disabling interrupts permanently. 2021-05-14 19:12:59 -04:00			`bne l1`
Cleanups for Creativision. 2017-02-01 19:46:04 +01:00			`rts`