Hi everyone.

I have 4 of the P80C321 processors. i know they are the same as the intel 8051 but with a little extra. But how do i make a minimal computer using them?

Datasheets and links would be great

Also, does a simple computer need ROM? Cant you just write the program into the ram directly and then run that?

 

Also, does a simple computer need ROM? Cant you just write the program into the ram directly and then run that?

You sure can. I used to watch the poor guy assigned to the Data General Supernova spend 45 minutes daily manually loading the boot loader into RAM.

Having ROM around for permanent functions is more than convenient. Study up on any old 8 bit system to see the many functions that were contained therein.