mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 15:29:46 +00:00
64 lines
1.3 KiB
ArmAsm
64 lines
1.3 KiB
ArmAsm
;
|
|
; Groepaz/Hitmen, 19.10.2015
|
|
;
|
|
; lowlevel kclrscr for the monochrome soft80 implementation
|
|
;
|
|
|
|
.export soft80mono_kclrscr
|
|
.import soft80mono_kplot
|
|
.import soft80mono_internal_bgcolor, soft80mono_internal_cellcolor
|
|
.importzp ptr1
|
|
|
|
.include "c64.inc"
|
|
.include "soft80.inc"
|
|
|
|
soft80mono_kclrscr:
|
|
|
|
lda #<soft80_bitmap
|
|
sta ptr1
|
|
lda #>soft80_bitmap
|
|
sta ptr1+1
|
|
|
|
lda #$ff
|
|
|
|
ldx #$1f
|
|
@lp2:
|
|
ldy #0
|
|
@lp1:
|
|
sta (ptr1),y
|
|
iny
|
|
bne @lp1
|
|
inc ptr1+1
|
|
dex
|
|
bne @lp2
|
|
|
|
;ldx #$00
|
|
@lp3:
|
|
sta soft80_bitmap+$1e40,x
|
|
inx
|
|
bne @lp3
|
|
|
|
sei
|
|
ldy $01
|
|
lda #$34 ; enable RAM under I/O
|
|
sta $01
|
|
|
|
lda soft80mono_internal_cellcolor
|
|
; clear loop for vram
|
|
;ldx #$00
|
|
@lp4:
|
|
sta soft80_vram,x
|
|
sta soft80_vram+$100,x
|
|
sta soft80_vram+$200,x
|
|
sta soft80_vram+$2e8,x
|
|
inx
|
|
bne @lp4
|
|
|
|
sty $01
|
|
cli
|
|
|
|
ldx #0
|
|
ldy #0
|
|
clc
|
|
jmp soft80mono_kplot
|