I threw the FrankOS project together to see how it works. I am not yet impressed. I did not have a psram ic on my core board so not much runs, no mmbasic at all. It really needs the extra ram. Screen display is very stable , could not get the mouse to work , the keyboard is ok. I have a few PSRAM chips ordered to try again. Will report after the ram arrives.

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UPDATE----
I found the WeAct rp2350b core module that had pads for PSRAM are not all wired in. I chased my tail on this one for days. Out of ideas , I stacked it on the flash with the cs line still going to gp47. Worked first time. Now frankos partially works. There are a few apps on the MOS2 directory that work ok. Stephans basic runs and a few utility programs are ok (the psram app verifies my memory is ok).Still no mmbasic. All programs in the FOS directory freeze and then reboot the machine. I was about to give up , I will try a bit more now.

  gadgetjack said  

I found the WeAct rp2350b core module that had pads for PSRAM are not all wired in

If you're talking about the one above, I've soldered PSRAM on two of them and they're working fine.

Sorry for OT, but the new PGA2350  gives all freedom you need when using the board for own designs. To place bootsel and USB wherever you like plus 8MB PSRAM and A4 stepping.

Regards

  gadgetjack said  

PSRAM ... I stacked it on the flash with the cs line still going to gp47.

Does this mean you can do it with essentially any RP2350 board? Like this?


With CS lifted and wired to GP0?

@Javavi showed it first