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Want to make a bug-free 6551?

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drogon

Post subject: Want to make a bug-free 6551?

Posted: Tue Jul 07, 2020 8:02 pm

Joined: Wed Feb 14, 2018 2:33 pm
Posts: 1488
Location: Scotland

Google are giving us the chance to have 100 custom design ICs... for free.

More details here: https://fossi-foundation.org/2020/06/30/skywater-pdk

-Gordon

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Gordon Henderson.
See my Ruby 6502 and 65816 SBC projects here: https://projects.drogon.net/ruby/

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cbmeeks

Post subject: Re: Want to make a bug-free 6551?

Posted: Tue Jul 07, 2020 9:09 pm

Joined: Wed Aug 17, 2005 12:07 am
Posts: 1250
Location: Soddy-Daisy, TN USA

VIC-II, SID & POKEY please... :-)

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Cat; the other white meat.

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Rob Finch

Post subject: Re: Want to make a bug-free 6551?

Posted: Wed Jul 08, 2020 6:41 pm

Joined: Sun Dec 29, 2002 8:56 pm
Posts: 460
Location: Canada

There's a 6551 compatible core at opencores.org (uart6551). Not guaranteed to be bug free at this stage, but has been tried in an FPGA. It's register set compatible with a 6551. It may also be used as an upgraded 6551 core with a 32-bit data bus. It might be a starting point for a 6551 core.

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