IO via REPL/shell

[orangecms]

Forth back then, U-Boot shell nowadays let you do direct IO via commands; see e.g. the memory read/write commands in U-Boot.

see also

• Zephyr shells https://blog.golioth.io/useful-zephyr-shells-for-iot-development/
• U-Boot md et al https://docs.u-boot.org/en/latest/usage/cmd/md.html
• https://wiki.laptop.org/go/OFW_FAQ
• https://u-root.org *msr commands etc