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cc65/libsrc/pce/cvline.s
2018-08-30 11:48:46 +02:00

30 lines
865 B
ArmAsm

;
; Ullrich von Bassewitz, 08.08.1998
;
; void cvlinexy (unsigned char x, unsigned char y, unsigned char length);
; void cvline (unsigned char length);
;
.export _cvlinexy, _cvline
.import gotoxy, putchar, newline
.importzp tmp1
.include "pce.inc"
_cvlinexy:
pha ; Save the length
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 #CH_VLINE ; Vertical bar
jsr putchar ; Write, no cursor advance
jsr newline ; Advance cursor to next line
dec tmp1
bne L1
L9: rts