ZX80/81 expansion

From: Adrian Graham <agraham_at_ccat.co.uk>
Date: Wed Mar 28 03:44:51 2001

>Date: Wed, 28 Mar 2001 01:34:58 +0100 (BST)
>From: ard_at_p850ug1.demon.co.uk (Tony Duell)
>Subject: Re: ZX-TEAM meeting/TS1000 least expandable???
>> I thought that since the ZX80's memory couldn't be expanded, there were
>> expansion port either.
>I am sure I've seen Sinclair adverts for a 16K RAM pack for the ZX80. And
>maybe a smaller RAM pack (3K? 4K?) as well. I always assumed the
>connector was the same, because things like the ZX printer would work on
>the ZX80 if you fitted the later ROM, I think.

My ZX80 came with a ZX81 16K RAM pack and it works fine; ISTR physical
differences aside the only real difference between the 80 and 81 was the ROM
anyway, so by the time you'd bunged a 81 ROM in your 80 you ended up with an
81! The ROM even came with a 81 keyboard, overlay or real keyboard; can't
remember which.

The Jupiter Ace had a 4K RAM pack as well as a 16K one, and if anyone has a
spare Ace (UK) or Ace 4000 (US) I'd be happy to take it off them :o)

Adrian Graham MCSE/ASE/MCP
C CAT Limited
Gubbins: http://www.ccat.co.uk (work)
<http://www.snakebiteandblack.co.uk> (home)
<http://www.binarydinosaurs.co.uk> (The Online Computer Museum, now W3C
Received on Wed Mar 28 2001 - 03:44:51 BST

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