I know. But they won't run PC emulators unless the programmer is truly heroic. I have worked on a slower Cortex-M3 than that. I've also worked on 8051 varian

I know. But they won't run PC emulators unless the programmer is truly heroic. I have worked on a slower Cortex-M3 than that. I've also worked on 8051 variants and on ST-62 (called "ST6 architecture" in the link below). My first computer was a ZX81 with a 16KB RAM pack. https://en.wikipedia.org/wiki/ST6_and_ST7 https://en.wikipedia.org/wiki/ST6_and_ST7