dos33fsprogs/mode7/scroll_demo.s
2017-12-31 15:09:37 -05:00

51 lines
943 B
ArmAsm

.include "zp.inc"
;================================
; Clear screen and setup graphics
;================================
jsr clear_screens ; clear top/bottom of page 0/1
jsr set_gr_page0
;===============
; Init Variables
;===============
lda #0
sta DISP_PAGE
;=======================
; decompress scroll text
;=======================
lda #10
sta CV
scroll_forever:
lda #>deater_scroll
sta INH
lda #<deater_scroll
sta INL
jsr gr_scroll
jmp scroll_forever
;===============================================
; Routines
;===============================================
.include "../asm_routines/gr_fast_clear.s"
.include "../asm_routines/gr_scroll.s"
.include "../asm_routines/pageflip.s"
.include "../asm_routines/gr_setpage.s"
.include "../asm_routines/gr_offsets.s"
;===============================================
; Variables
;===============================================
.include "deater_scroll.inc"