VAXstation 3100/76 configured as VAXserver and NetBSD

arcarlini at iee.org arcarlini at iee.org
Tue Jan 16 16:40:44 CST 2007


Seth J. Morabito wrote:

> The 68-pin connector on these is NOT standard, and definitely NOT
> SCSI-III.

There are non-DEC machines around that use the MicroD68 (or is it
Honda68) connector ... is it just the gender that makes you say
it is non-standard? Or do you believe that the DEC pin-out does not 
match the SCSI-2 pinout? (I cannot claimn for sure that it does
since the M76 may have come out before SCSI-2 ... the engineering
spec for the KA43 (system board used in the M76) is dated 16-Oct-1990
but I don't have the date of the SCSI-2 spec to hand. Either way,
I pretty sure that the M76 SCSI is SCSI-1.

Have you tried connecting one of those 68-pin-to-50-pin SCSI
converters on it to see whether a device will work?

This page http://www.phm.lu/documentation/connectors/SCSI.asp
has the various pinouts so if you have a BC09J to hand you
can buzz it out and see whether things are as expected or
not. (My desktop VAX is a VS4000-90, which went back to
the 50-way connectors on the back so I don't have a 
BC09J to hand.

According to the cable guide I have, the BC56H (equiv to
a BC09J but straight rather than 90 degrees ... or vice
versa) is also used on the Decstation 2100/3100 and
the InfoServer tower (whose part number I don't know).
So it is not unique to this box.

Antonio






More information about the cctalk mailing list