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Old 11 December 2018, 04:32   #1
grelbfarlk
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A4000 Busboard .brd

Hello,
Some googling didn't return me a result, so I'm wondering is there a replacement A4000 busboard design available somewhere in .brd format hopefully? I'm not sure if Acill's or Hese's replacement A4000 motherboard designs had a replacement busboard included, I didn't see them.



Reason I'm bringing this up, MBoehmer released his Prometheus Firestorm design supporting some commonly available CPLDs, which I believe are the XC95144XL which seem to be easily available and pretty cheap. http://www.e3b.de/prometheus/


So why not take the A4000 busboard, delete the ISA slots and extend the first or last Zorro slot out to the Prometheus board which is now inline with the backplane? (and taking place of the ISA slots)


For maximum stupid idea'edness put a PMC slot on the back of the busboard (on the PCI side) so the Rapture, Apocalypse or Ragnarok could sit behind the busboard next to the IDE/Floppy/CIA's in the A4000.



Hopefully someone can tell me why this is an impractical idea.


There is a license fee, the producer of such a board would have to send one to MBoehmer.
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Old 11 December 2018, 05:53   #2
Hedeon
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Which part? The first part sound like a good idea. Also seems practical. The second part would only cater to a handful of people so I guess one of those people has to design it or pay someone to do it otherwise I don't see the incentive.
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Old 11 December 2018, 18:03   #3
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There was definitely a replacement Zorro riser card designed to go with the remade A4000 boards, but I can't remember where I saw it or what the licence for it was. Maybe in the Commodore Amiga Facebook group? It lacked the ISA slots and gave better airflow.
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Old 11 December 2018, 18:55   #4
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I believe you are talking about the 4000DB: https://github.com/arananet/A4000db/...ster/README.md
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Old 11 December 2018, 19:22   #5
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That's the one indeed, thanks!
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Old 11 December 2018, 22:55   #6
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Thanks guys, that should work.
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Old 19 December 2018, 02:25   #7
grelbfarlk
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Again it seems I am very late to the party, someone more experienced is already working on this and it sounds very exciting, more than what I hoped for. Everyone can breathe a sigh of relief that it's not me doing it.
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Old 19 December 2018, 02:50   #8
Hedeon
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Quote:
Originally Posted by grelbfarlk View Post
Again it seems I am very late to the party, someone more experienced is already working on this and it sounds very exciting, more than what I hoped for. Everyone can breathe a sigh of relief that it's not me doing it.
Link would be nice.
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Old 19 December 2018, 03:23   #9
grelbfarlk
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Quote:
Originally Posted by Hedeon View Post
Link would be nice.

If there was a link I would post it. I don't want to speak for others or announce things if they are not public. For all I know it could be a week, a month or longer. All I'm saying that I'm not doing this project since someone far better is doing it instead.
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