PicoGraph v0.1.0 — PicoMEM and PicoMEM2 firmware

PicoGraph firmware for PicoMEM2 and original PicoMEM boards fitted with a Pico 2.

Choose the package for your hardware:

• PICOMEM2: PicoMEM2 with its onboard RP2350B.
• PICOMEM_M1: Original PicoMEM with a replacement Pico 2.

Each package includes UF2 binaries for MDA, Hercules, EGA, VGA, CL-GD5429, and DTL-H201A.

To flash the binaries to the PicoMEM2, attach it to your computer using a USB-C cable:

• Remove the card from the target PC.
• Hold down the reset button on the card, and plug in the cable. Then release the button.
• Once you see the flash drive on your computer, copy one of the UF2 binaries to it.
• The drive will unmount automatically once flashing is complete.

Notes:

• This is a very alpha build, and you will see tearing and slowdowns with high resolutions.
• The CL-GD5429 BIOS probably won’t work with CPUs older than a 286.
• While the PicoGraph firmware is in use, the original PicoMEM functionality will not be available.

I use PicoGraph for experimentation, and as a debug probe for my FPGA graphics cores. I’m still evaluating whether it works well as a DisplayLink based video card, but it was a fun hack. :)

Please let me know if you have any questions.

Thanks,
-Ian