Need DTC brand Qbus SCSI board info - test-drb@ccmp.vtda.org

26 Nov 1998

...
 No LSI chips on board; only two ROM chips
(82S123N's with paper labels "LSH
1" and LSD0" typed on them) plus others are typical 74xxx-series chips (LS,
S and 7400-series) except bus I/F chips are the typical DS8641N's.  
It is suspected to be SCSI as there is a 50-pin pin connector on the
ejector end and a tag on the antistatic bag has "Probably SCSI" written on
it by what is apparently a DEC dealer/reseller in Pittsburgh. 
50-pin connectors might hint that it could be SCSI, but it could be
a lot of other things too.  8-inch SA800-type floppy is the most obvious.

DTC also sourced some boards which were controllers for SA1000-type
and SA4000-type hard drives.

...
 It could be an earlier SASI type board too as the date
codes on the chips
run from mid-1982 to a few from the first weeks of 1983. IIRC, that's
around the tail end of the SASI protocol days and beginning of the SCSI
protocol.
Anyway, I need to get info on this to see if it could be used on either my
MicroVAX II or MicroPDP-11/73.  
If it is a SCSI/SASI controller, it certainly isn't MSCP-emulating, which
would make it not particularly useful for a stock OS.

You can always plug it into a machine and scan the I/O page to see what address
it turns up at.  This will give you a big hint as to what it emulates (if
anything!)

-- 
 Tim Shoppa                        Email: shoppa(a)trailing-edge.com
 Trailing Edge Technology          WWW:   http://www.trailing-edge.com/
 7328 Bradley Blvd		   Voice: 301-767-5917
 Bethesda, MD, USA 20817           Fax:   301-767-5927