;
; Ullrich von Bassewitz, 22.09.1998
;
; void clrscr (void);
;

	.export		_clrscr
	.import		plot
        .import         CURS_X: zp, CURS_Y: zp, CharPtr: zp

	.include	"cbm610.inc"

.proc	_clrscr

	lda	#0
	sta	CURS_X
	sta	CURS_Y
       	jsr	plot		; Set cursor to top left corner

	lda	IndReg
	pha
	lda	#$0F
	sta	IndReg		; Switch to the system bank

	ldx	#8
	ldy	#$00
	lda	#$20	   	; Screencode for blank
L1:	sta	(CharPtr),y
   	iny
   	bne	L1
   	inc	CharPtr+1
	dex
	bne	L1

	pla
	sta	IndReg		; Restore old indirect segment

	jmp	plot		; Set screen pointer again

.endproc



