1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
;
; Maciej 'YTM/Elysium' Witkowiak
;
; 06.03.2002
; void cclearxy (unsigned char x, unsigned char y, unsigned char length);
; void cclear (unsigned char length);
.export _cclearxy, _cclear
.import gotoxy, fixcursor
.importzp cursor_x, cursor_y, cursor_c
.include "jumptab.inc"
.include "geossym.inc"
_cclearxy:
pha ; Save the length
jsr gotoxy ; Call this one, will pop params
pla ; Restore the length
_cclear:
cmp #0 ; Is the length zero?
beq L9 ; Jump if done
tax
lda cursor_x ; left start
sta r3L
lda cursor_x+1
sta r3L+1
lda cursor_y ; level
sta r2L
clc
adc #7
sta r2H
txa ; right end
clc
adc cursor_c
sta cursor_c
sta r4L
ldx #r4
ldy #3
jsr DShiftLeft
clc ; one pixel less
lda r4L
sbc #0
sta r4L
lda r4L+1
sbc #0
sta r4L+1
lda curPattern ; store current pattern
pha
lda #0 ; set pattern to clear
jsr SetPattern
jsr Rectangle
pla
jsr SetPattern ; restore pattern
jsr fixcursor
L9: rts
|
