tiny_tracker: a few more bytes

demos/l/music_256/d2.s

@@ -30,6 +30,8 @@
 ; 247 bytes -- count on X always being $FF when hit delay
 ; 246 bytes -- make SONG_COUNTDOWN self-modify code
 ; 241 bytes -- forgot we didn't need to init volume in play_frame anymore
+; 238 bytes -- can use Y to save note value in play_frame now
+; 237 bytes -- make song terminator #$FF so we don't have to load it
 
 .zeropage
 ;.globalzp       rot_smc
@@ -98,6 +100,8 @@ inner_wait:
 ; pad so starts at $80
 .byte $00,$00,$00,$00
 .byte $00,$00,$00,$00,$00
+.byte $00,$00,$00
+.byte $00
 
 ; music
 .include	"mA2E_2.s"

demos/l/music_256/play_frame.s

@@ -23,29 +23,23 @@ set_notes_loop:
 	;====================================
 	; if at end, loop back to beginning
 
-	asl			; reset song offset to 0
-	tax
+	tax				; reset stack offset to $FF
 	txs
-	beq	set_notes_loop
+	bmi	set_notes_loop
 
 not_end:
 
 	; NNNNNECC -- c=channel, e=end, n=note
 
-	sta	SAVE			; save note
+	tay				; save note
 
 	and	#3
-	tax
-
-	ldy	#$0E
-	sty	AY_REGS+8,X		; $08 set volume A,B,C
 
 	asl
 	tax				; put channel offset in X
 
+	tya				; restore note
 
-	lda	SAVE			; restore note
-	tay
 	and	#$4
 	sta	song_countdown_smc+1	; always 4 long?
 

demos/l/music_256/text_to_tiny.c

@@ -458,7 +458,7 @@ printf("\n");
 //	printf("\t.byte $FF ; end\n");
 
 	/* assume 16 notes or fewer */
-	printf("\t.byte $80 ; end\n");
+	printf("\t.byte $FF ; end\n");
 	total_len++;
 
 	int o,n;