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jamesbowman / swapforth

Swapforth is a cross-platform ANS Forth
BSD 3-Clause "New" or "Revised" License
275 stars 55 forks source link

I have ported j1b to Artix-7 (cmod-A7 board and Arty) #55

Closed bmentink closed 6 years ago

bmentink commented 6 years ago

Hi James,

I don't know if you are still contactable or if this project is still active, but I have posted this just in case are still interested.

I have j1b running at 80Mhz on both Spartan-6 and Artix-7 boards - it will run at 100Mhz (just) on the Artix-7, but borderline as there is timing issues on the ram dstack .... Is there a way to improve this?

Also for your interest, I have implemented a number of Floating point hardware modules in verilog and interfaced them to Forth (F+,F-,F*,F/ and F-inverse-sqrt) They all happen in less than 3 clock cycles.

On Artix-7 Forth + FP takes up 3500 LUT's .......

jamesbowman commented 6 years ago

Sounds interesting - will you be publishing the source?

I don't know of any ways to improve j1b's timing. As I recall I'd already tried to optimize its paths as much as possible.

bmentink commented 6 years ago

I am happy to provide the source, when I get it all together and documented.

However, this should be a two-way street, you are very hard to contact. If I am to donate the code, then I would expect that to change .... ;) (I have asked you a number of questions in the past and have been ignored ..)

jamesbowman commented 6 years ago

You are welcome to fork the repo, then you can decide how much time to devote to supporting an open-source project.

OK to close this issue?

bmentink commented 6 years ago

Ok, get the hint. You don't want to put in any more time :) I will contribute to an existing fork of your code that is well supported ..

Cheers, and have a great day.

PS: Close away ....