Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!cbmvax!daveh
From: daveh@cbmvax.commodore.com (Dave Haynie)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A500, ROM, 1.3, 2.0
Message-ID: <22753@cbmvax.commodore.com>
Date: 28 Jun 91 02:37:10 GMT
References: <1991Jun27.222315.86974@vaxc.cc.monash.edu.au>
Reply-To: daveh@cbmvax.commodore.com (Dave Haynie)
Organization: Commodore, West Chester, PA
Lines: 21

In article <1991Jun27.222315.86974@vaxc.cc.monash.edu.au> bull@vaxc.cc.monash.edu.au writes:

>        I'm under the *impression* that the 1.2/1.3 rom in the A500 is 256
>Kbytes, that 2.0 will need a 512 Kbyte rom, 

True

>that a standard 512 Kbyte rom is not pin compatible with a 256 Kbyte rom, 

Untrue.  

The 128K x 16 ROM used in A500s and A2000s is pin compatible with a 256K x 16
ROM, which will be the medium used for 2.0.  However, some A500s (but not
A2000s) were released before that 512K pinout was finalized.  They guessed
at the free pin that would be used, but guessed wrong, so a small tower or a
wire jumper on the ROM will be necessary for older A500s.

-- 
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
   {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: hazy     BIX: hazy
	"This is my mistake.  Let me make it good." -R.E.M.