skip dli

dither-image.js

@@ -1004,11 +1004,9 @@ ${byte2byte(odd(frame.palette3))}
 .align 1024
 displaylist:
     ; 24 lines overscan
-    .repeat 2
+    .repeat 3
         .byte $70 ; 8 blank lines
     .endrep
-    ; include a DLI to mark us as frame 0
-    .byte $f0 ; 8 blank lines
 
     ; ${height} lines graphics
     ; ANTIC mode e (160px 2bpp, 1 scan line per line)

dither4.s

@@ -27,7 +27,6 @@ sample_ptrh = $85
 sample_ptr = sample_ptrl
 scanline = $86
 audiotemp = $87
-frame_counter = $89
 
 ;height = 160
 height = 192
@@ -103,12 +102,6 @@ audio_high_byte:
     lda #.hibyte(displaylist)
     sta DLISTH
 
-    ; Set up the DLI handler
-    lda #.lobyte(dli_handler)
-    sta VDSLSTL
-    lda #.hibyte(dli_handler)
-    sta VDSLSTH
-
     ; Disable VBI but allow Reset and DLI
     lda #$a0
     sta NMIEN
@@ -230,10 +223,6 @@ wait_loop:
         ; Do bookkeeping during vblank!
         audio_inc      ; 22-32 cycles
 
-        ; frame cleanup: 11 cycles
-        lda frame_counter ; 3 cycles
-        eor #1            ; 2 cycles
-        sta frame_counter ; 3 cycles
         jmp each_frame    ; 3 cycles
     .endscope
     .endmacro
@@ -243,10 +232,3 @@ run_frame1:
     run_frame 0
 
 .endproc
-
-
-.proc dli_handler
-    lda #0
-    sta frame_counter
-    rti
-.endproc