[net.unix-wizards] Multiple UNIBUS on 750"s

bob@unm-ivax.UUCP (06/30/83)

Armando may be right about 4.2BSD not supporting the
second Unibus adaptor on a VAX 11/750 (I don't know
because I don't have 4.2 yet), but how come in:
"Hints on Configuring VAX Systems for Unix
 Revised for 4.2BSD: March 15, 1983
	Bob Kridle & Sam Leffler"
on page 9 (Table 1) it says:

Criterion		UDA50/RA81			Emulex SC7?0/Fujitsu
								Eagle
-------------------------------------------------------------------------------
Initial Purchase	UDA50 and 1st RA81 -		SC750 and first Eagle -
Cost - 750		$57.00/Mbyte w/o additional	$55.00/Mbyte
			UNIBUS adaptor; $70.00/Mbyte
			with UNIBUS adaptor

Initial Purchase	UDA50 and 1st RA81 -		SC780 and 1st Eagle -
Cost - 780		$83.00/Mbyte with UNIBUS	$65.00/Mbyte
			adaptor

. . .			. . .				. . .


Column 2 implys to me that 4.2 supports 2 UBAs on a 750.
Am I misreading things?  Has Berkeley really put this support in?
OR is the documentation wrong?

			Bob Tomlinson
			ucbvax!lbl-csam!lanl-a!unm-ivax!bob
			(505) 277-6131

mike.rice%rand-relay@sri-unix.UUCP (07/12/83)

From:  Mike.Caplinger <mike.rice@rand-relay>

There is no 750 dual Unibus support in 4.1c; I don't know yet about
4.2.  As we have dual Unibus 750s at Rice, we were forced to write the
code ourselves for 4.1, and it should port easily to 4.1c anyway.
It's quite trivial, and if anyone is interested I can send them a
description of what needs to be changed, and maybe a diff, though I'll
have to get the Berkeley original back from tape.  I irresponsibly
deleted it locally in a fit of enthusiasm.