cc65/libsrc/cbm/cclear.s

;
; Ullrich von Bassewitz, 08.08.1998
;
; void cclearxy (unsigned char x, unsigned char y, unsigned char length);
; void cclear (unsigned char length);
;

        .export         _cclearxy, _cclear
        .import         gotoxy, cputdirect
        .importzp       tmp1

_cclearxy:
        pha                     ; Save the length
        jsr     gotoxy          ; Call this one, will pop params
        pla                     ; Restore the length and run into _cclear

_cclear:
        cmp     #0              ; Is the length zero?
        beq     L9              ; Jump if done
        sta     tmp1                                 
L1:     lda     #$20            ; Blank - screen code
        jsr     cputdirect      ; Direct output
        dec     tmp1
        bne     L1
L9:     rts
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00			`;`
			`; Ullrich von Bassewitz, 08.08.1998`
			`;`
			`; void cclearxy (unsigned char x, unsigned char y, unsigned char length);`
			`; void cclear (unsigned char length);`
			`;`

Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`.export _cclearxy, _cclear`
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			`.import gotoxy, cputdirect`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`.importzp tmp1`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00
			`_cclearxy:`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`pha ; Save the length`
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			`jsr gotoxy ; Call this one, will pop params`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`pla ; Restore the length and run into _cclear`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00
			`_cclear:`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`cmp #0 ; Is the length zero?`
			`beq L9 ; Jump if done`
			`sta tmp1`
			`L1: lda #$20 ; Blank - screen code`
			`jsr cputdirect ; Direct output`
			`dec tmp1`
			`bne L1`
			`L9: rts`