[Coco] How do I program a new ECB ROM with minimal external hardware ?

[coco at jechar.ca]

All

Ok reformulating my question as one cannot write a EEPROM for a 5V 
system with 3.3V hardware such as the Raspberry Pi
Since I already have a raspberry pi I had been hoping this would be a 
good solution.

I am looking for something preferably cheep but more importantly easy to 
use reading and writing coco3 ROM's.

Charlie.