CPU Softcore Compendium

[Rick C]

Some time ago a link was posted here to a very comprehensive list of soft CPU designs which included LUT counts, clock rates, instructions per clock and a performance metric incorporating all three. I don't recall the author's name, but it was amazingly complete.

Anyone remember that? Still got the link?

--

Rick C.

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On Thursday, April 16, 2020 at 11:14:19 AM UTC-5, Rick C wrote:

Some time ago a link was posted here to a very comprehensive list of soft CPU designs which included LUT counts, clock rates, instructions per clock and a performance metric incorporating all three. I don't recall the author's name, but it was amazingly complete.

Anyone remember that? Still got the link?

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

https://opencores.org/projects/up_core_list/summary

Several legacy processors are listed:
https://opencores.org/projects/up_core_list/downloads
uP_core_list_by_style-clone190221.pdf

Also look into MISTer as it supports several legacy systems.
None are competitive speed wise with high performance uP.

With LUTs costing less than $0.001 each some soft core uPs are inexpensive, free if you have unused LUTs and block RAMs.
For debug, changing block RAM contents is much faster than rerunning the FPGA design.