🚀 go-pugleaf

on re-reading your posting, I see you want EEPROM program
memory.  I guess that means you're stuck with the 68HC11.
(The TI TMS370 has EEPROM _data_ memory.)

One alternative is to put a boot-loader in EPROM, and
upload from a serial EEPROM.  You can talk to the EEPROM
through either a couple of parallel port pins or using
the synchronous serial I/O port.  Typical serial EEPROM's
hold up to 2K bits and cost about $1 (in quantity, samples
are usually free).