Wozmon (written by Steve Wozniak in 1976) created for the 68000 and 6800-family of peripherals.
This hex monitor runs on the system described in my blog.
I use Vasm mot-style to assemble this project.
$ make VASM=~/.bin/vasm68k # <- default, your Vasm binaryI use Minipro for writing the binaries to EEPROM.
$ minipro -p W27C020 -s -w lds.bin # odd/lower address
$ minipro -p W27C020 -s -w uds.bin # even/upper address