mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-10-03 03:54:50 +00:00
22 lines
195 B
ArmAsm
22 lines
195 B
ArmAsm
;==========
|
|
; flip page
|
|
;==========
|
|
flip_page:
|
|
lda DRAW_PAGE
|
|
beq draw_page2
|
|
draw_page1:
|
|
bit PAGE2
|
|
lda #0
|
|
|
|
beq done_flip
|
|
|
|
draw_page2:
|
|
bit PAGE1
|
|
lda #$4
|
|
|
|
done_flip:
|
|
sta DRAW_PAGE
|
|
|
|
rts
|
|
|