A83: Routine Help, Clearing Section of Graph Buffer... =P

To: assembly-83@lists.ticalc.org
Subject: A83: Routine Help, Clearing Section of Graph Buffer... =P
From: Jkhum98@aol.com
Date: Sun, 7 Feb 1999 17:25:15 EST
Delivered-To: assembly-83-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-83@lists.ticalc.org
Reply-To: assembly-83@lists.ticalc.org


Whats wrong with this short routine...? =P  I want to be able to clear the
first 8 Bytes of Every line of the Graph Buffer, and avoid affecting the last
4 Bytes on every line.  This freezes, but does not crash, my calc for some
reason. I do not see the problem... :\  I would like some assistence here
please, thanks... =P

--Jason K.

Erase_Board:
	ld hl, PLOTSSCREEN
	ld de, 5
	ld bc, 63
Erase_Loop_1:
	push bc
	ld b, 8
Erase_Loop_2:
	ld (hl), 0
	inc hl
	DJNZ Erase_Loop_2
	pop bc
	add hl, de
	DJNZ Erase_Loop_1
	ret

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