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rewind2: fix scrolling

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This commit is contained in:
Vince Weaver 2025-03-26 18:34:10 -04:00
parent c728eee55d
commit ab8006978e
3 changed files with 12 additions and 31 deletions
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38
demos/rewind2/headphones/headphones.s
View File

@ -37,7 +37,7 @@ headphones:
sta zx_src_l+1
lda #>headphone_bin
sta zx_src_h+1
jsr zx02_full_decomp_main
jsr zx02_full_decomp_main
lda #<headphone_aux
sta zx_src_l+1
@ -48,9 +48,13 @@ headphones:
lda #$20
sta DRAW_PAGE
;=================================
; clear screens
jsr clear_dhgr_screens
;=================================
; copy graphic to off-screen page
; copy graphic to off-screen page1
ldx #0
ldy #128
@ -82,34 +86,10 @@ headphones:
jsr hgr_page_flip
.if 0
; jsr wait_vblank
; jsr hgr_page_flip
;========================
; load graphic to page 1
lda #<headphone_bin
sta zx_src_l+1
lda #>headphone_bin
sta zx_src_h+1
jsr zx02_full_decomp_main
lda #<headphone_aux
sta zx_src_l+1
lda #>headphone_aux
sta zx_src_h+1
jsr zx02_full_decomp_aux
jsr wait_vblank
jsr hgr_page_flip
.endif
;==================
; scroll a bit
lda #64
lda #62
sta SCROLL_COUNT
scroll_loop:
@ -119,14 +99,14 @@ scroll_loop:
ldx #0
ldy #2
ldx SCROLL_COUNT
lda SCROLL_COUNT
jsr slow_copy_main
jsr hgr_vertical_scroll_aux
ldx #0
ldy #2
ldx SCROLL_COUNT
lda SCROLL_COUNT
jsr slow_copy_aux
jsr wait_vblank

4
demos/rewind2/slow_copy.s
View File

@ -53,7 +53,7 @@ slow_copy_smc2:
dec LENGTH
bne slow_copy_outer_loop
bit RDMAIN
bit WRMAIN
sta RDMAIN
sta WRMAIN
rts

1
demos/rewind2/start.s
View File

@ -132,6 +132,7 @@ skip_all_checks:
;====================================
;====================================
lda #0
jsr hgr_page1_clearscreen
sta WRAUX ; writes to AUX memory
jsr hgr_page1_clearscreen