A89: help me!!

To: assembly-89@lists.ticalc.org
Subject: A89: help me!!
From: Jer2665@aol.com
Date: Sun, 14 Mar 1999 01:36:33 EST
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-89@lists.ticalc.org
Reply-To: assembly-89@lists.ticalc.org


ok,  please reply as soon as possible before i kill myself.  why wont the
following code erase the sprite if it goes right or down,  it only erases that
space it was at if it goes left or up.  i am using fill instead of clearing
the whole screen.  please help quickly.

	include "doorsos.h"
        include "graphlib.h"
        include "userlib.h"


        xdef    _main
        xdef    _comment
        xdef    _ti89


_main
        move.w  #0,d6
        move.w  #0,d7
	jsr     graphlib::clr_scr
start   move.w d6,d0
	move.w d7,d1
	move.w #8,d2
	move.w #8,d3
	move.w #1,d4
	jsr     graphlib::fill
        lea     sprite(pc),a0
        jsr     graphlib::put_sprite
key     jsr     userlib::idle_loop
        move.w  ($7596),d0
	cmp.w #344,d0
	beq east
	cmp.w #338,d0
	beq west
	cmp.w #337,d0
	beq north
	cmp.w #340,d0
	beq south 
        cmp.w #264,d0
        beq     quit
        bra     key
north   tst.w   d6
        beq     key
        sub.w   #5,d6
        bra     start
west    tst.w   d7
        beq     key
        sub.w   #5,d7
        bra     start
south   cmp.w   #70,d6
        beq     key
        add.w   #5,d6
        bra     start
east    cmp.w   #70,d7
        beq     key
        add.w   #5,d7
        bra     start


quit
        rts

sprite  dc.w    8,1
        dc.b    %11111111
        dc.b    %10000001
        dc.b    %10000001
        dc.b    %10000001
        dc.b    %10000001
        dc.b    %10000001
        dc.b    %10000001
        dc.b    %11111111


_comment: dc.b  "Sprite moving example",0
        end

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