Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!ingr!phil
From: phil@ingr.com (Phil Johnson)
Newsgroups: comp.realtime
Subject: Re: 80c51 vs. 68hc11
Keywords: realtime, 8051, 68hc11
Message-ID: <6396@ingr.com>
Date: 12 Sep 89 13:49:07 GMT
References: <2127@uceng.UC.EDU>
Reply-To: phil@ingr.UUCP (Phil Johnson)
Organization: Intergraph Corp. Huntsville, Al
Lines: 30

In article <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

I have used the MC68HC11, but not the 80C51.  The MC68HC11 is an extremely
vesatile processor that tends to help the designer rather than hinder.

>	scheduling, etc.  Motorola apparently offers its MCX11 kernel, 
>	source code and manual for free! (see Sept. 1 1989 issue of _EDN_)
>	Has anyone had any experience with this?  Are there any inexpensive
>	realtime kernels out there for the 8051?  (or even a good Public
>	Domain source of 8051 code).

Motorola maintains a BBS in Austin that is open to anyone using Motorola
processors.  The board contains PD assemblers and programs (source code)
for each of their processors.  There are a number of MC68HC11 source code
programs such as definition include files available for downloading.

Unfortunately I do not have the telephone number for the BBS but you can
obtain it from your local Motorola dealer.  This is the microprocessor
BBS (they have another board called Dr. BuB for the DSP product line). 

I would recommend the MC68HC11 for ease of design and because of the support
provided by Motorola.

-- 
Philip E. Johnson                    UUCP:  usenet!ingr!b3!sys_7a!phil
MY words,                           VOICE:  (205) 772-2497
MY opinion!