26 Nov
2002
26 Nov
'02
12:14 p.m.
On Nov 27, 0:02, Tony Duell wrote:
> The coolest item there, for me, is his Jupiter
Ace.
I what sense is it 'based on the ZX81'? OK,
both have Z80A processors,
both used 2114 RAMs. But [ snippage ]
I didn't realise they were so different inside. I knew the Ace didn't use
the ULA but I thought the basic architecture was similar to the ZX80/ZX81
(apart from the screen memory, which I knew about). There was certainly a
rumour at the time that that was the case, but I dare say that was as much
due to the similar size and shape of case as anything else :-) Perhaps
"inspired by" is better than "based on".
I have the manuals for ZX80, ZX81, and the Jupiter ACE, and the service
manual for the ZX81, but the only one of those machines I possess is the
common-or-garden ZX81. Twice I've just missed getting a ZX80, and I've
seen a few, but I've only seen seen one ACE.
--
Pete Peter Turnbull
Network Manager
University of York