Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!hplabs!well!cbm
From: cbm@well.UUCP (Chris Muir)
Newsgroups: comp.realtime
Subject: Re: 80c51 vs. 68hc11
Summary: No 8051!
Keywords: realtime, 8051, 68hc11
Message-ID: <13578@well.UUCP>
Date: 12 Sep 89 19:57:15 GMT
References: <2127@uceng.UC.EDU>
Reply-To: cbm@well.UUCP (Chris Muir)
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 24

In message <2127@uceng.UC.EDU> skohls@uceng.uc.edu (Steve Kohls)
writes:

>        I have a few questions for those out there that have used the
>        Intel 80C51 or Motorola 68HC11 series of processors.  I am
>        working on a project which will require several microcontrollers
>        in a distributed network, and I am trying to decide which one to
>        use.  I would like to use an available realtime kernel to control
>        scheduling, etc.

If your project requires much external memory, stay away from the 8051
family. I used 3 of them in an electronic music project a year or two
ago and was very sorry. Two 8051s were sharing a dual-port memory and
the other was sitting on the end of a serial line. I wrote my own
scheduler/dispatcher, my own interrupt stuff, in short, my own
everything. If I had to do it again (no, not that...arrgh) I would run
to the Motorola family.


-- 
_______________________________________________________________________________
Chris Muir                             |   "There is no language in our lungs
{hplabs,pacbell,ucbvax,apple}          |    to tell the world just how we feel" 
!well!cbm                              |                         - A. Partridge