A82: Ldir command

To: assembly-82@lists.ticalc.org
Subject: A82: Ldir command
From: "Evil Sam" <evil_sam@hotmail.com>
Date: Tue, 08 Sep 1998 13:23:52 PDT
Delivered-To: assembly-82-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-82@lists.ticalc.org


   Suppose I want to copy 192 bytes before GRAPH_MEM to TEXT_MEM2 and 
TEXT_MEM. It would look something like this:
         ld       de,GRAPH_MEM-192    
         ld       hl,TEXT_MEM2      
         ld       bc,128          
         ldir                         


         ld       de,GRAPH_MEM-64
         ld       hl,TEXT_MEM+64  
         ld       bc,64           
         ldir      

   Is DE the location of the information needing to be copied or the 
place where the information is being copied to? In BoulderDash 82, I 
have it written as stated above. If I'm wrong and DE is the address of 
the place to which the information is being copied, then BoulderDash 
will cause some wierd effect like inability to ZOOM.
  Sam

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