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From: finnis@WELSWS.enet.dec.com (Peter Finnis)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: 2M chip ram for A500 rev 6 boards????
Message-ID: <14627@shlump.nac.dec.com>
Date: 16 Aug 90 03:04:36 GMT
Sender: newsdaemon@shlump.nac.dec.com
Distribution: comp
Organization: Digital Equipment Company ( Uk )
Lines: 16


>	Is the revision 6 A500 mainboard wired for the extra address line to
>support 1Mx4 DIPS. Also is there any modification needed other than replacing
>the current 256kx4 DIPS with the 1Mx4s to produce a 2M chip ram A500, as the
>Agnus chip in the rev 6 boards is supposed to be the same as in the A3000 that
>supports 2M chip ram.
> 
	Can You expand the 256x4 to 1 Meg on board plus the 512kb Trapdoor
	to give 1.5 Meg ??
	I presume this requires the Fatter Agnus (02) , But what links do
	you add/cut ..   Rev 6A motherboard Amiga 500 only..
      ___               		  
     /  /    	    Peter Finnis 
    /__/__ _/_  __  Digital,  Shire Park, The Boulevard,Welwyn Garden City,
   /   /_/ /   /_/  England.	   
  /   /_  /__ /_    finnis%welsws.dec@decwrl.dec.com  Phone: 0707-374174