Tony Duell wrote:
>>> Can I assume you've not tried replacing that RAM yet?
>> No, I've removed it from the board and re-tested the Ace, but all
>> seems well now.
> Hmm... Without a full set of RAMs you can't get a sensible video
> display, so you can't really know how well the machine is working.
I know. I also know it runs a RAM test on bootup...
It's a real pain that I'm not going to have the RAMs until Monday at the
earliest... Unfortunately Royal Mail aren't open on a Sunday and I can't
justify travelling down to York just for ?10 worth of RAMs. And I haven't
seen anyone on this list who lives in or around Leeds (West Yorkshire)...
>> I've got a 2114 in an old Commodore 64. I can justify pilfering
>> parts from it because the PSU brick blew, the keyboard is shot and
>> C= sold about a
> Sure...
Oh, come on. The damn keyboard is missing a key and most of the parts in it
are board pulls! The PSU brick blew up and there are at least another
thousand of the things lying around in people's garages and attics gathering
dust!
The VIC is about the only part in the whole machine that *does* work. That
and the 2114 colour RAM.
>> BTW, anyone got a pinout for the User Port (the smallest edge
>> connector) on
> IIRC, It's actually a video port -- it carries many of the video
> timing signals, etc. I think there was at least one colour board that
> connected here (and to the system bus, of course). The design _may_
> have been published in ETI about 20 years ago, but I am not certain.
Hmm... Interesting. You got a copy of the article, if it was published in
ETI?
>> I'm also trying to track down some edge connectors for the bus port
>> on my Sinclair Spectrum +2A, a disc controller and drive for same
>> (unless the controller works with PC-style 3.5" drives) and an edge
>> connector for the Bus port on the Jupiter Ace. Anyone know of a
>> source for any of these items?
> They're all standard 0.1" pitch AFAIK. You make have to buy longer
> connectors and cut them down.
That shouldn't be too difficult. I think Farnell still stock edge
connectors.
> One point, I assume you realise that while the Ace and Sinclair
> machines have much the same signals on the bus connector (a plain Z80
> bus, unbuffered), the pinout is totally different.
Yup. That point is mentioned in the "Jupiter Ace FORTH Programming" manual.
Thanks.
--
Phil.
philpem_at_dsl.pipex.com
http://www.philpem.dsl.pipex.com/
Received on Sat Dec 07 2002 - 13:41:00 GMT