mirror of
https://github.com/peterdell/wudsn-ide.git
synced 2024-06-03 06:29:35 +00:00
69 lines
815 B
ArmAsm
69 lines
815 B
ArmAsm
|
|
.include "vcs.inc"
|
|
.include "globals.inc"
|
|
|
|
.segment "ZEROPAGE"
|
|
POS : .byte $00 ;
|
|
ASAVE : .byte $00 ;
|
|
XSAVE : .byte $00 ;
|
|
YSAVE : .byte $00 ;
|
|
|
|
.segment "CODE"
|
|
|
|
reset:
|
|
sei
|
|
cld
|
|
ldx #$ff
|
|
txs
|
|
inx
|
|
txa
|
|
@loop:
|
|
sta $00,x
|
|
inx
|
|
bne @loop
|
|
|
|
vblankstart:
|
|
lda #$02
|
|
sta WSYNC
|
|
sta VBLANK
|
|
sta WSYNC
|
|
sta WSYNC
|
|
sta WSYNC
|
|
sta VSYNC
|
|
sta WSYNC
|
|
sta WSYNC
|
|
lda #$29
|
|
sta TIM64T
|
|
lda #$00
|
|
sta WSYNC
|
|
sta COLUBK
|
|
sta VSYNC
|
|
|
|
waitforpicturestart:
|
|
lda #$2f
|
|
sta TIM64T
|
|
jsr calcscroll
|
|
jsr calcbeamrider
|
|
@wait:
|
|
lda INTIM
|
|
bne @wait
|
|
sta VBLANK
|
|
|
|
ldx #$03
|
|
@loop3:
|
|
sta WSYNC
|
|
dex
|
|
bne @loop3
|
|
|
|
jsr logodraw
|
|
jsr scrollerstart
|
|
jsr beamrider
|
|
|
|
ldx #$0c
|
|
@loop4:
|
|
sta WSYNC
|
|
dex
|
|
bne @loop4
|
|
|
|
jmp vblankstart
|