enso1 - Yes, I've tried (so far unsuccessfully) to shoehorn that into my existing design but I have not gotten the timing with waitstates, refresh etc. correct yet.

The lack of simulation tools in the GoWin-toolchain does not help - I think I'll have to look at how they have made a Verilator model ...

venomix, that looks great!

I've been meaning to get the 20K. Should have done it earlier... Last time it was $30 on amazon prime, today it's only available as a kit with game controllers for $48 on prime. Otherwise it is shipped from China. Unsurprizingly, the US is experiencing a mini-hyper ...

Thanks!

The Tang Nano-boards are really nice development platforms, especially for the price.

I have made a 65C02-based SoC for the Tang Nano 20K which boots CP/M-65 from the SD-card and has 80x30 text output on HDMI (at 640x480). It supports a USB keyboard with a carrier board, so it works quite well as ...