difference between LSI-11 CPU's M7264 and M7270 - test-drb@ccmp.vtda.org

26 Sep 2005

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Subject: Re: difference between LSI-11 CPU's M7264 and M7270
   From: Pete Turnbull <pete at dunnington.plus.com>
   Date: Mon, 26 Sep 2005 21:52:59 +0100 (BST)
Of course many of these are copies of each other, but I'm sure if there
were an error, DEC would have corrected it at some time between 1975
and 1983 :-)

;) my 81 and 83 copies do not agree with the 76/77 copy. considering its
was obtained internal to DEC it may have been a first printing.  I had 
to use my lsi-11 system service manual as the arbiter as its later than 83.
If I were actually working on the system I'd just pull the cage and look
before grabbing the book.   Then again I do have a assortment of Qbus 
and a few have non standard backplanes that were never supplied in 
the boxes I have them in.

Allison