urk, maybe no cycles free ;)

dither4.s

@@ -131,6 +131,7 @@ wait_loop:
 each_scanline:
     ; it'll fire on unused lines, but harmlessly
 
+    .macro fake1
         jmp fake
         ; audio sample; low nybble
         ldx #0
@@ -153,6 +154,7 @@ each_scanline:
         ora #$10
         lda #0
         pha
+    .endmacro
 
     fake:
     lda #18
@@ -187,6 +189,7 @@ each_scanline:
 
     inner_scanline
 
+    .macro audio_inc
         ; Increment sample ptr
         jmp audio_cont
         inc sample_ptrl
@@ -205,6 +208,7 @@ each_scanline:
         sta sample_ptrl
         lda #.hibyte(audio_samples)
         sta sample_ptrh
+    .endmacro
 
 audio_cont:
 
@@ -212,11 +216,11 @@ audio_cont:
 
     lda VCOUNT
     cmp #130 ;#130
-    ;bne each_scanline
-    bne foo
+    bne each_scanline
+    ;bne foo
     jmp wait_start
-    foo:
-    jmp each_scanline
+    ;foo:
+    ;jmp each_scanline
 
 .endproc