P80C321 processor

Discussion in 'Embedded Systems and Microcontrollers' started by Robin Mitchell, Nov 9, 2010.

  1. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
    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?
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    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.