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skip dli

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This commit is contained in:
Brooke Vibber 2024-09-07 12:17:39 -07:00
parent 9242ffc4e6
commit 5ac783315a
2 changed files with 1 additions and 21 deletions
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4
dither-image.js
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@ -1004,11 +1004,9 @@ ${byte2byte(odd(frame.palette3))}
.align 1024 .align 1024
displaylist: displaylist:
; 24 lines overscan ; 24 lines overscan
.repeat 2 .repeat 3
.byte $70 ; 8 blank lines .byte $70 ; 8 blank lines
.endrep .endrep
; include a DLI to mark us as frame 0
.byte $f0 ; 8 blank lines
; ${height} lines graphics ; ${height} lines graphics
; ANTIC mode e (160px 2bpp, 1 scan line per line) ; ANTIC mode e (160px 2bpp, 1 scan line per line)

18
dither4.s
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@ -27,7 +27,6 @@ sample_ptrh = $85
sample_ptr = sample_ptrl sample_ptr = sample_ptrl
scanline = $86 scanline = $86
audiotemp = $87 audiotemp = $87
frame_counter = $89
;height = 160 ;height = 160
height = 192 height = 192
@ -103,12 +102,6 @@ audio_high_byte:
lda #.hibyte(displaylist) lda #.hibyte(displaylist)
sta DLISTH sta DLISTH
; Set up the DLI handler
lda #.lobyte(dli_handler)
sta VDSLSTL
lda #.hibyte(dli_handler)
sta VDSLSTH
; Disable VBI but allow Reset and DLI ; Disable VBI but allow Reset and DLI
lda #$a0 lda #$a0
sta NMIEN sta NMIEN
@ -230,10 +223,6 @@ wait_loop:
; Do bookkeeping during vblank! ; Do bookkeeping during vblank!
audio_inc ; 22-32 cycles 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 jmp each_frame ; 3 cycles
.endscope .endscope
.endmacro .endmacro
@ -243,10 +232,3 @@ run_frame1:
run_frame 0 run_frame 0
.endproc .endproc
.proc dli_handler
lda #0
sta frame_counter
rti
.endproc