[Coco] Am9511 Arithmetic Processing Unit Cartridge Pak for the Color Computer
Don Barber
don at dgb3.net
Tue Mar 14 19:53:25 EDT 2023
Thanks so much for the kind words Mark, Richard, and David. I know an
APU is probably not the most attractive peripheral for the CoCo
community but it was a fun project that involved a few technical hurdles
and *lot* of debugging so really happy someone appreciates it.
I don't imagine many people are interested in actually building one of
these as its so niche, but if I get some interest I might be talked into
placing an order with nextpcb/pcbway to get a batch and bring the bare
boards to CoCoFest. Not looking to make money; would probably be at cost
at $6-7 per board (unfortunately not as cheap as my usb serial card bare
boards were as I'm now out of coupon codes). I also have two spare
Am9511-1DC chips (the version up to 3 Mhz) if anyone is interested in
those (my cost was $8.25 each).
Oh, and Mark, I saw the test procedure you referenced in the CCS 7811
manual used PUPI; thats the exact same test I used when I was debugging.
The first time I saw 02C90FDA come back correctly I was very happy. Very
fitting to discuss on Pi day. :)
Thanks,
Don
On 3/14/23 11:07, Mark Overholser wrote:
> Don:
> Thanks for this Cool Project and ALL the Background Info..
> I have an AMD 9511 Co-Processor card for my Apple ][ but haven't
> "delved into" what it takes to interface it with Assembly Language
> with the 6502. I also haven't located the Apple Software to Patch the
> APPLESOFT BASIC , ( also a Micro-Soft BASIC ) to leverage the
> Co-Processor.
> This is an Applied Analytics uSPEED Math Co-Processor Card with an AMD
> AM9511A
> http://tech.markoverholser.com/files/HPIM5346.JPG
> which seems very similar to the "Model 7811 Arithmetic Processor" from
> California Computer Systems , because this card passes the CCS 7811
> Install Test, found on Page 2-3 of the Manual.
> http://mirrors.apple2.org.za/Apple%20II%20Documentation%20Project/Interface%20Cards/CPU/CCS%207811/Manuals/CCS%207781B%20Arithmetic%20Processor%20-%20Owner%27s%20Manual.pdf
>
> With your research, I can probably Make my own APPLESOFT Patches and
> leverage the AMD 9511 on the Apple ][ as well as make your card and
> leverage the AMD 9511 on the CoCo..
> MarkO
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