lproven at gmail.com
Thu Jul 21 18:07:41 CDT 2016
On 21 July 2016 at 23:26, Pete Turnbull <pete at dunnington.plus.com> wrote:
> Um, isn't that pretty much what I wrote? I'm pretty sure the first
> batch(es) weren't rated for the full 200.
I don't know; I'm basing this comment mainly on Wikipedia.
> Hmm. Never seen one like that. None of the ones I've seen in real life are
> PQFPs, and none have a heatsink.
Perhaps you misread my message.
My point was that DEC's own Alpha RISC CPU was so dependent on good
cooling that the actual chip package included bolts to screw a
In comparison, StrongARM, a DEC chip based on a licensed-in ISA,
needed so little cooling it shipped in a plastic package. No need for
> They're all plastic pin grid array
> packages. No heatsink at all. Nor does the datasheet for the PQFP show
> anything related to a heatsink. It also shows a PLCC version; no heatsink
> there either, and again I've never seen one. Maybe that's just because I
> normally only saw them in Acorn machines, of course.
You seem to misunderstand my remark about heatsinks.
It is also possible that I am misusing the term "PQFP" but I have
attempted to confirm it with Google image searches and I think it's
what I meant.
Is that not a PQFP chip? A flat plastic package with pins on all 4 sides?
>>> I wish I'd kept an A500, though. All I have now is the
>>> podule to connect it to a Beeb. Anybody got the machine to put it in?
>> I have an A5000, near-new in box. But it's not been removed for about
>> 15y and I've no idea what working condition it's in. I could post it
>> to you when I'm next in the UK -- probably early next month. If you're
>> interested, make drop me a line off-list. It's in my storage unit in
>> South Wimbledon, where I have no power or anything, so I can't
>> plausibly get it out and test it.
>> I am planning to move the rest of my stuff here to Czechia next month,
>> mainly for cost reasons due to the falling GBP. If you wished you
>> could come and meet me and inspect it in person?
> There's a thought. I'd be up for that, though it's not actually an A5000 I
> meant; the A500 was the development system - looks rather like an A310 but
> without the fancy front bezel, and painted blue/grey.
Ah, sorry, that was my mistake!
> There were only a few
> made. They were used internally during development - hence the podule to
> connect it to a Beeb, which provided the I/O early on - and in the later
> stages before the Archimedes launch in 1987, several were loaned to software
This is the machine Dick Pountain reviewed, I think.
Liam Proven • Profile: http://lproven.livejournal.com/profile
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