Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uakari.primate.wisc.edu!sdd.hp.com!ucsd!ogicse!intelhf!agora!billsey
From: billsey@agora.uucp (Bill Seymour)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: 2 meg chip RAM hack wanted
Message-ID: <1990Aug21.182718.862@agora.uucp>
Date: 21 Aug 90 18:27:18 GMT
References: <1990Aug21.143813.7205@uokmax.uucp>
Organization: Open Communication Forum
Lines: 31

In article <1990Aug21.143813.7205@uokmax.uucp> drtiller@uokmax.uucp (Donald Richard Tillery Jr) writes:
:Hey all you hardware types!  Has anyone got any idea how to hack 2 Megs of
:Chip RAM out of a B2000 using the new 2 Meg Agnus?  Surely one of you A1000
:owners who have done some much great hardware hacks for it has upgraded to the
:B2000 and is as desperate for 2 Megs of chip as I.  
:
:I'm not in a position where I have the time to look into this myself (at least
:for another year in my E.E. program) but I was thinking maybe a piggy back set
:up with an extra address line added.  I recall a similar hack on my TRaSh-80
:color computer for 32K on a 16K machine that worked fine.  I don't know if
:there's enough physical room on the motherboard, but if there is....
:
:If no one is looking into this, perhaps a techie at C= could give me enough
:info (and 2 Meg Agnus availability) for me to give it a try, I WAS looking
:for a senior project :-)

	I looked into a bit when the 2 meg Agnus was first announced... When
I found that adapter sockets to piggyback boards on PLCC sockets cost in the
neighborhood of $140 each, I put it aside though. :-{ Note that the pinouts
of the two chips are different, and any good hack would have to be a piggyback
instead of an in-socket hack. (Too bad, we could have remapped the one meg of
onboard memory into $c00000 and made 11meg 2000s popular. :-) )

:Rick Tillery


-- 
     -Bill Seymour             ...tektronix!reed!percival!agora!billsey
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