dcx51.doc

8051实时操作系统

From: [e-mail] (Jim Trethewey)
Newsgroups: comp.sys.intel comp.realtime
Subject: Intel puts 8051 O/S into public domain
Sender: [e-mail]
Followup-To: comp.sys.intel
Distribution: world
Organization: Intel Corporation (Real-Time Software)
Keywords: 8051 realtime operating-system

     *****************************************************
     *                                                   *
     *  INTEL RELEASES 8051 FAMILY O/S TO PUBLIC DOMAIN  *
     *                                                   *
     *****************************************************

            As a service to the many people who have been
     requesting it, Intel Corporation has placed its 8051 
     family Real-Time Multitasking Operating System into 
     the public domain.  

	    The Distributed Control Executive, iDCX 51, 
     was introduced in 1984 as a tool for designers of 
     factory automation and robotic control.  It was the 
     basis for a distributed control product line using 
     the BITBUS (IEEE 1118) serial bus.

            The source code (in 8051 assembler language) 
     for the iDCX 51 is available for anonymous FTP on the
     Internet at:

        Site                    Directory/Filename
	----------------------  ----------------------
	vab02.larc.nasa.gov     pub/dcx51.tar.Z
	wuarchive.wustl.edu     pub/dcx51.tar.Z

     Documentation for the operating system is available as:

	iDCX 51 Distributed Control Executive User's Guide for Rel. 2.0
	Order Number 460367-001
	Cost (U.S.) $20.00 + postage

     from:

	Intel Literature Sales
	P.O. Box 7641 
	Mt. Prospect, IL  60056-7641  USA
	Telephone [phone]

     ****************************************************
     *                                                  *
     *   IMPORTANT (NON-) SUPPORT NOTE !!!              *
     *                                                  *
     ****************************************************

             Although Intel has decided to provide this 
     source to the public at no charge, it CAN NOT afford 
     to provide free customer support.  Having the source 
     means if you find a bug, you can fix it yourself, 
     and post the fix to the comp.sys.intel newsgroup.  
     Please DO NOT call for Intel customer support on 
     this product!  

     ****************************************************
     *                                                  *
     *   NOMENCLATURE                                   *
     *                                                  *
     ****************************************************

     DCX51 (or iDCX 51)

	A Distributed Real-Time Multitasking Executive for 
	the 8051 family of microcontrollers.  The current
	release is R2.1.

     DCM44 (or iDCM 44)

	A communications task for iDCX 51.  When installed
	as task 0, and run on the 8044 flavor of the 8051
	family (the 8044 contains an SDLC unit instead of
	RS-232C), it provides BITBUS (IEEE 1118) message-
	passing ability between up to 250 microcontroller
	nodes.  It also provides the RAC (Remote Access
	and Control) functions for remote message-based
	operations such as read/write-memory, create/delete
	DCX task, etc.

	You do not *have to* use DCM44 if you only want
	DCX51, and in fact you *cannot* run DCM44 "AS IS"
	on processors other than the 8044/8344/8744.
      
     DCS110 (or "BITWARE")
       
	This is a developer's package which contains the 
	files needed to program iDCX 51 tasks *assuming*
	that you already have an 8044 BEM (the flavor of
	the BITBUS component with DCX51 + DCM44 already
	masked in ROM).  It includes the DCX51I interface
	library (to get to ROM entry points) but not the
	DCX51 library (which actually contains the O/S).
	This product also contains the file DCM44 which
	is an ICE-5100 loadable copy of DCM44.

     DCS120

	Same as DCS110 but no ICE-loadable DCM44 image.
	 
     ****************************************************
     *                                                  *
     *   INSTALLATION INSTRUCTIONS                      *
     *                                                  *
     ****************************************************

     1) On your UNIX machine, un-compress and un-tar the
	package:

	compress -d dcx51.tar.Z
	mkdir dcx51
	cd dcx51
	tar xvf ../dcx51.tar

     2) Using Microsoft Networks, PC-NFS, or some other 
	networking, mount the UNIX drive on your DOS PC 
	and copy all the un-tar-ed files to the PC, in
	a manner similar to the following example:

	net use x: \\unixbox\mylogon mypasswd
	mkdir dcx51
	xcopy x:\dcx51 dcx51 /s /e
	net use x: /d

     ****************************************************
     *                                                  *
     *   REGENERATION INSTRUCTIONS                      *
     *                                                  *
     ****************************************************

     1) Make sure you have the ASM-51 product installed, and
	accessible via PATH.  If you don't have this
	expensive Intel product, third-party 8051 assemblers
	might work (but *I* haven't tried them).

     2) Rebuild iDCX51 using batch file R2AGEN.BAT:

	cd dcx51\dcx51src.21
	r2agen

	The resultant files are in the dcx51\dcx51src.21\rel21
	subdirectory.  These files should be identical to the
        contents of the DCX51SU product floppy.

     3) Rebuild iDCM44 using batch file DCMGEN.BAT:

	cd dcx51\dcm44src.21
	dcmgen

	The resultant files are in the dcx51\dcx51src.21\dcs110
	subdirectory.  These files should be identical to the
	contents of the DCS110SU product floppy.

     ****************************************************
     *                                                  *
     *   ACKNOWLEDGMENTS                                *
     *                                                  *
     ****************************************************

	This product was developed primarily by Ron Smith 
	and Rick McAlister, both of whom did a great job, 
	but want nothing to do with it anymore.

	Placed in the public domain, with permission,
	by Jim Trethewey ([e-mail]).