Re: A83: Scrolling background...

To: assembly-83@lists.ticalc.org
Subject: Re: A83: Scrolling background...
From: Olle Hedman <oh@hem.passagen.se>
Date: Thu, 30 Jul 1998 02:08:05 +0100
Delivered-To: assembly-83-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <199807291356.WAA16517@tkb.att.ne.jp>
Reply-To: assembly-83@lists.ticalc.org


You have to increase HL to..  this way you just rr the first byte 768 times..


At 22:54 1998-07-29 +0900, you wrote:
>
>What's wrong with this code?  Thanks...
>
>---<START USELESS CODE>---
>
>.NOLIST
>#define equ .equ
>#define EQU .equ
>#define end .end
>#include "ti83asm.inc"
>#include "tokens.inc"
>.LIST
>
>.org 9327h
>
>  ld    hl,picture
>  ld 	de,PLOTSSCREEN
>  ld 	bc,768
>  ldir
>  call  _grbufcpy_v
>
>  ld    b,96
>mainloop:
>  push  bc
>
>  ld    hl,PLOTSSCREEN
>  ld    b,0
>loop1:
>  rr    (hl)
>  djnz  loop1
>loop2:
>  rr    (hl)
>  djnz  loop2
>loop3:
>  rr    (hl)
>  djnz  loop3
>
>  call  _grbufcpy_v
>
>  pop   bc
>  djnz  mainloop
>
>  ret
>
>picture:
>  {deleted}
>
>.end
>.end
>
><--END USELESS CODE-->
>
>

References:

A83: Scrolling background...

From: "James Matthews" <matthews@tkb.att.ne.jp>

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