dos33fsprogs/demos/demosplash2022/tracker_init.s

tracker_init:

	; setup initial ay-3-8910 values (this depends on song)

	; claer out $70-$90
init_registers_to_zero:
	ldx	#$20			; init registers to zero
	lda	#0
init_loop:
	sta	AY_REGS,X
	dex
	bpl	init_loop

	lda	#$38				; ABC channels on
	sta	AY_REGS+7			; $07 mixer
demo: more missing files 2022-11-12 19:32:56 +00:00			`tracker_init:`

			`; setup initial ay-3-8910 values (this depends on song)`

demo: add in apple logo 2022-11-13 04:23:32 +00:00			`; claer out $70-$90`
demo: more missing files 2022-11-12 19:32:56 +00:00			`init_registers_to_zero:`
demo: add in apple logo 2022-11-13 04:23:32 +00:00			`ldx #$20 ; init registers to zero`
demo: more missing files 2022-11-12 19:32:56 +00:00			`lda #0`
			`init_loop:`
			`sta AY_REGS,X`
			`dex`
			`bpl init_loop`

demo: sort of have music working 2022-11-12 23:40:59 +00:00			`lda #$38 ; ABC channels on`
			`sta AY_REGS+7 ; $07 mixer`