[Info-vax] VMS 5.0

[Bill Pechter]

In article <iS3cmVpDqwhm at eisner.encompasserve.org>,
Bob Koehler <koehler at eisner.nospam.encompasserve.org> wrote:
>In article <j9c95r$if5$1 at Iltempo.Update.UU.SE>, Johnny Billquist
><bqt at softjar.se> writes:
>> 
>> Well, the RX01 don't have a serial interface, to start with. :-)
>
>   No, but the RX01 was on the LSI-11, and the interface to the rest of
>   the VAX was supposed to be a serial connection.
>

Don't believe so... The cables up to the VAX from the 11/03 were
parallel ribbon cables.  The only thing that may be true is the
microcode patches have been serially loaded. 

Been 20+ years since my 11/780 HW Maint training on Crosby Drive, but
IIRC, the PDP11/03 did a "maintenance return" of a 16 bit word up through the
parallel interface to the 11/780 where it hit the console interface
board.  That was responsible for moving the bits wherever down the VAX
backplane.  Don't remember if that was bit serial or not...

Bill
too long from Field Service to pick up the bits from memory...
Will check the 11/780 maint handbook when I get home.

-- 
-- 
Digital had it then.  Don't you wish you could buy it now!
              pechter-at-pechter.dyndns.org