cc65/libsrc/osic1p/gotoxy.s

;
; copied from CBM implementation
;
; originally by:
; Ullrich von Bassewitz, 06.08.1998
;
; void gotoxy (unsigned char x, unsigned char y);
;
        .export         gotoxy, _gotoxy
        .import         popa, plot
        .include        "extzp.inc"

gotoxy:
        jsr     popa            ; Get Y

_gotoxy:
        sta     CURS_Y          ; Set Y
        jsr     popa            ; Get X
        sta     CURS_X          ; Set X
        jmp     plot            ; Set the cursor position
Switch to assembler for cputc implementation. 2014-11-22 00:07:55 +00:00			`;`
Minor cleanup of unnecessary newlines. 2015-01-11 17:22:36 +00:00			`; copied from CBM implementation`
			`;`
			`; originally by:`
Switch to assembler for cputc implementation. 2014-11-22 00:07:55 +00:00			`; Ullrich von Bassewitz, 06.08.1998`
			`;`
			`; void gotoxy (unsigned char x, unsigned char y);`
			`;`
Introduced internal gotoxy that pops both parameters. About all CONIO functions offering a <...>xy variant call popa _gotoxy By providing an internal gotoxy variant that starts with a popa all those CONIO function can be shortened by 3 bytes. As soon as program calls more than one CONIO function this means an overall code size reduction. 2016-06-05 12:58:38 +00:00			`.export gotoxy, _gotoxy`
Switch to assembler for cputc implementation. 2014-11-22 00:07:55 +00:00			`.import popa, plot`
Include "extzp.inc" instead of using direct imports of symbols. 2015-02-12 21:12:51 +00:00			`.include "extzp.inc"`
Switch to assembler for cputc implementation. 2014-11-22 00:07:55 +00:00
Introduced internal gotoxy that pops both parameters. About all CONIO functions offering a <...>xy variant call popa _gotoxy By providing an internal gotoxy variant that starts with a popa all those CONIO function can be shortened by 3 bytes. As soon as program calls more than one CONIO function this means an overall code size reduction. 2016-06-05 12:58:38 +00:00			`gotoxy:`
			`jsr popa ; Get Y`

Switch to assembler for cputc implementation. 2014-11-22 00:07:55 +00:00			`_gotoxy:`
			`sta CURS_Y ; Set Y`
			`jsr popa ; Get X`
			`sta CURS_X ; Set X`
			`jmp plot ; Set the cursor position`