Who Needs a Raspberry Pi Microcontroller Chip? Maybe You

Re:Who Needs a Raspberry Pi Microcontroller Chip? Maybe You by mrlonglong on Monday January 24, 2022 @07:29PM (#30066225)

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?

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Re:Who Needs a Raspberry Pi Microcontroller Chip? Maybe You by gadgetoid on Tuesday January 25, 2022 @04:13AM (#30069853)

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

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Re:Who Needs a Raspberry Pi Microcontroller Chip? Maybe You by alar44 on Monday January 24, 2022 @10:53PM (#30067762)

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.

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Re:Who Needs a Raspberry Pi Microcontroller Chip? Maybe You by mrlonglong on Tuesday January 25, 2022 @07:54PM (#30080294)

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

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