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;
; Ullrich von Bassewitz, 08.08.1998
;
; void cvlinexy (unsigned char x, unsigned char y, unsigned char length);
; void cvline (unsigned char length);
;
.include "atari.inc"
.export _cvlinexy, _cvline
.import popa, _gotoxy, putchar
.importzp tmp1
.ifdef __ATARI5200__
CHRCODE = 1 ; exclamation mark
.else
CHRCODE = $7C ; Vertical bar
.endif
_cvlinexy:
pha ; Save the length
jsr popa ; Get y
jsr _gotoxy ; Call this one, will pop params
pla ; Restore the length and run into _cvline
_cvline:
cmp #0 ; Is the length zero?
beq L9 ; Jump if done
sta tmp1
L1: lda COLCRS
pha
lda #CHRCODE ; Vertical bar
jsr putchar ; Write, no cursor advance
pla
sta COLCRS
inc ROWCRS
dec tmp1
bne L1
L9: rts
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