microlisp

lisp on avr microcontrollers (and others)

http://www.ulisp.com/

ben eater

https://eater.net/

computer on breadboards

http://6502.org/

forth on avr microcontrollers

eforth http://forth.org/eforth.html

amforth http://amforth.sourceforge.net/

flash forth https://www.flashforth.com/

incantations

sudo avrdude -c usbtiny -p m328p -e -U flash:w:uno.hex:i -U eeprom:w:uno.eep.hex:i

sudo avrdude -c usbtiny -p m328p -e -U flash:w:uno.hex:i -U eeprom:w:uno.eep.hex:i

sudo avrdude -P usbtiny -p m328p -e -U efuse:w:0x05:m -U hfuse:w:0xD9:m -U lfuse:w:0xFF:m