Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!rutgers!cbmvax!grr
From: grr@cbmvax.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: expanding amiga 1000 to 2000
Message-ID: <1434@cbmvax.cbmvax.cbm.UUCP>
Date: Thu, 19-Feb-87 02:52:04 EST
Article-I.D.: cbmvax.1434
Posted: Thu Feb 19 02:52:04 1987
Date-Received: Fri, 20-Feb-87 06:54:39 EST
References: <12279780357.24.PKG.SPARKMAN@MCC.COM> <1430@cbmvax.cbmvax.cbm.UUCP>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Organization: Commodore Technology, West Chester, PA
Lines: 31

In article <1430@cbmvax.cbmvax.cbm.UUCP> hedley@cbmvax.UUCP (Hedley Davis) writes:
>Both the 256K internal, and the 256K expansion memory on the A1000 are
>CHIP memory. Inside the A1000, none of the signals exsist to directly
>drive FAST memory. Therefore, to add FAST memory, the cost would be
>considerably higher. ( Read: considerably more complex ).
>
>You can of course add FAST memory to the A1000, but this requires a full
>and complete 68000<->DRAM interface including some sort of refresh, and
>other goodies. Because you have no sockets, you therefore need a new
>PCB.

Not to tread on Hedley's toes, but this does bring up an interesting point...

You actually do have all the stuff in your Amiga needed to add 'FAST' ram!
It's on that 'kickstart tower'.  If someone wants to cover some new ground,
I would suggest getting one of those ROM conversion kits, and then expanding
the ram on the kickstart tower rather than the 'CHIP' ram.

There are a number of advantages to this and the only disadvantage I see is
that it won't auto-config.  (no big deal).  It wouldn't be that hard even
to make a replacement board for 1-4MB.  Power supply shouldn't be a problem
if you remember that what you use inside, you can't extract from the external
ports...

Anyway, you could always expand both ways!  If you're going to go out and
void your warranty, you might as well have fun doing it...

-- 
George Robbins - now working for,	uucp: {ihnp4|seismo|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@seismo.css.GOV
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)