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cc65/libsrc/osic1p/chline.s
Stephan Mühlstrasser 92e75e9df8 Incorporated another round of feedback for pull request.
Adjusted comment formatting in several assembler files.
Removed dummy kbhit() function, as it's better to get a linker
error than an implementation that does the wrong thing.
2015-02-18 18:38:42 +01:00

30 lines
841 B
ArmAsm

;
; based on CBM implementation
;
; originally by:
; Ullrich von Bassewitz, 08.08.1998
;
; void chlinexy (unsigned char x, unsigned char y, unsigned char length);
; void chline (unsigned char length);
;
.export _chlinexy, _chline
.import popa, _gotoxy, cputdirect
.importzp tmp1
_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
sta tmp1
L1: lda #$94 ; Horizontal line, screen code
jsr cputdirect ; Direct output
dec tmp1
bne L1
L9: rts