mirror of
https://github.com/cc65/cc65.git
synced 2024-11-16 02:10:52 +00:00
42 lines
1.2 KiB
ArmAsm
42 lines
1.2 KiB
ArmAsm
|
;
|
||
|
|
; Ullrich von Bassewitz, 08.08.1998
|
||
|
|
;
|
||
|
|
; void chlinexy (unsigned char x, unsigned char y, unsigned char length);
|
||
|
|
; void chline (unsigned char length);
|
||
|
|
;
|
||
|
|
|
||
|
|
.export _chlinexy, _chline
|
||
|
|
.import setscrptr
|
||
|
|
.import rvs
|
||
|
|
.import popax
|
||
|
|
.importzp ptr2
|
||
|
|
|
||
|
|
.include "atmos.inc"
|
||
|
|
|
||
|
|
|
||
|
|
_chlinexy:
|
||
|
|
pha ; Save the length
|
||
|
|
jsr popax ; Get X and Y
|
||
|
|
sta CURS_Y ; Store Y
|
||
|
|
stx CURS_X ; Store X
|
||
|
|
pla ; Restore the length and run into _chline
|
||
|
|
|
||
|
|
_chline:
|
||
|
|
tax ; Is the length zero?
|
||
|
|
beq @L9 ; Jump if done
|
||
|
|
jsr setscrptr ; Set ptr2 to screen, won't use X
|
||
|
|
txa ; Length into A
|
||
|
|
clc
|
||
|
|
adc CURS_X
|
||
|
|
sta CURS_X ; Correct X position by length
|
||
|
|
lda #'-' ; Horizontal line screen code
|
||
|
|
ora rvs
|
||
|
|
@L1: sta (ptr2),y ; Write one char
|
||
|
|
iny ; Next char
|
||
|
|
bne @L2
|
||
|
|
inc ptr2+1 ; Bump high byte of screen pointer
|
||
|
|
@L2: dex
|
||
|
|
bne @L1
|
||
|
|
@L9: rts
|
||
|
|
|