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cc65/libsrc/geos-common/conio/chline.s
ol.sc 46f1085e2d Fixed several aspects of the GEOS CONIO implementation:
- cputc was drawing at the wrong position, therefore one line had to be removed as a workaround.
- chline, cvline were drawing one pixel to large lines.
- cclear was drawing an in both directions one pixel to big rect.
- the cursor was drawn at wrong times at wrong places in a wrong size.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5874 b7a2c559-68d2-44c3-8de9-860c34a00d81
2012-10-23 19:42:57 +00:00

55 lines
968 B
ArmAsm

;
; Maciej 'YTM/Elysium' Witkowiak
;
; 06.03.2002
; void chlinexy (unsigned char x, unsigned char y, unsigned char length);
; void chline (unsigned char length);
.export _chlinexy, _chline
.import popa, _gotoxy, fixcursor
.importzp cursor_x, cursor_y, cursor_c
.include "jumptab.inc"
.include "geossym.inc"
_chlinexy:
pha ; Save the length
jsr popa ; Get y
jsr _gotoxy ; Call this one, will pop params
pla ; Restore the length
_chline:
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
clc
adc #4 ; in the middle of a cell
sta r11L
txa ; right end
clc
adc cursor_c
sta cursor_c
sta r4L
lda #0
sta r4L+1
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 #%11111111 ; pattern
jsr HorizontalLine
jsr fixcursor
L9: rts