[mrlonglong]

I've been toying with porting a tiny subset of Unix to the Raspberry Pico ever since I bought a pair of these cute little buggers. But memory at 264KB remains an issue. How easy is it to wire up SPI to some external RAM chips maybe on a breadboard?

[gadgetoid]

There’s no support for mapping external memory but you can apparently get creative: https://github.com/yocto-8/yocto-8/blob/main/doc/extmem.md

[alar44]

Yeah you won't even be able to decompress the kernel, you'll need at least a few MB of RAM (and even that would be heroic). Google SPI SRAM, pretty easy to use.

[mrlonglong]

I think it's totally possible if it's all run from the flash and only used the SRAM for housekeeping. Should be fun !