FWIW, you can make software that runs on Harvard architecture chips. They feature distinct address spaces for ROM and RAM. It's been a while, but it's how Atm

FWIW, you can make software that runs on Harvard architecture chips. They feature distinct address spaces for ROM and RAM. It's been a while, but it's how Atmel/Microchip AVR micros work. https://en.wikipedia.org/wiki/Harvard_architecture https://en.wikipedia.org/wiki/Harvard_architecture That said, I'm unaware of any programming language (outside assembler) that takes that split to heart in a higher-level way.