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Path: utzoo!linus!decvax!genrad!mit-eddie!cybvax0!dbr
From: dbr@cybvax0.UUCP (Douglas Robinson)
Newsgroups: net.dcom,net.lan,net.eunice
Subject: Re: MicroVax TCP/IP ?
Message-ID: <213@cybvax0.UUCP>
Date: Tue, 6-Nov-84 13:40:49 EST
Article-I.D.: cybvax0.213
Posted: Tue Nov  6 13:40:49 1984
Date-Received: Thu, 8-Nov-84 07:14:37 EST
References: <122@lamont.UUCP> <589@sjuvax.UUCP> <195@desint.UUCP>
Organization: Cybermation, Inc., Cambridge, MA
Lines: 48

Ok, for the full scoop (as much as I can tell):

	1. Unisource is a company, NOT a piece of software.
	   It has NOTHING to do with the MicroVAX-I (uVAX-I).

	2. ULTRIX is DEC's version of 4.2BSD (NOTE:  They track
	   USENET and fix errors in code!  No more maintenance
	   problems.)

	3. ULTRIX for the uVAX-I has just been released by
	   DEC and is known as: 'ULTRIX-32m rel. 1.0'.

	4. This is a non-changeable (unless you get source) linked
	   kernel with all drivers that DEC supports for the 
	   uVAX-I configuration.  A relinkable object file distribution
	   is in the works (a la ULTRIX-32 for the larger VAXen), but
	   won't be available for rel. 1.0.

	5. Adding drivers is a non-trivial problem!  The memory
	   map registers that you find on all larger VAX's are
	   NOT on uVAX-I so all devices are required to be MSCP
	   (so the driver can do scatter/gather for the machine).

	6. ULTRIX-32m WORKS WELL!  I have personnally MOVED
	   (NOT RECOMPILED, BUT COPIED) executables from an 11/750
	   running 4.2 BSD to this O/S and had them run without
	   problem! (5Mb in all!)

	7. uVAX-I is about the same speed as the 11/73.  It excells over
	   the 11/73 when overlays would be necessary and where a lot
	   of floating point is used (I have comparison benchmarks that
	   could be posted if enough desire becomes apparent).  It is
	   a little slower where 16 bit integers are involved.

	8. I am in the process of obtaining enough hardware to Ethernet
	   the uVAX-I and our 11/750 together.  This will be via 4.2BSD/
	   ULTRIX standard utilities using the DEQNA (Ethernet for
	   Q-Bus(22bit)) and the DEUNA (Ethernet for UNIBUS).  If desired,
	   I can post the results as well.
    
    I hope this clears up some of the confusion.
-- 
Doug Robinson		Jobs don't kill programmers... programmers kill jobs!
Cybermation, Inc.	617/492-8810
377 Putnam Avenue
Cambridge, MA 02139 (USA)

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