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cc65/libsrc/apple2enh/cvline.s

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ArmAsm
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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);
;
.export _cvlinexy, _cvline, cvlinedirect
.import popa, _gotoxy, putchar, newline
.importzp tmp1
_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:
ldx #'|' | $80 ; Vertical line, screen code
cvlinedirect:
cmp #$00 ; Is the length zero?
beq L9 ; Jump if done
sta tmp1
L1: txa ; Screen code
jsr putchar ; Write, no cursor advance
jsr newline ; Advance cursor to next line
dec tmp1
bne L1
L9: rts