I have what is believed to be a SCSI board from DTC. It is a dual-wide Qbus
module. "DTC" is silk-screened on the component side plus a FAB number,
ASSY number, REV number and S/N. Nothing on the ejector tab. Those numbers
likely do not mean anything to a search of DTC SCSI board info files but
here they are anyway: FAB 007-00003, ASSY 007-00002, REV 02, S/N 3028C2.
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.
Absolutely no part or type number on the component side and nothing on the
solder side. Searching the DTC website was useless as the only thing they
talked about in the Support area was all their PC-type SCSI boards. Nothing
on any web search turned up anything either (figures, it's such a
relatively old thing) unless there's actually a website the search engines
could not see . . .
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.
Anybody have any ideas on this? Any old DTC or independant DEC reseller
catalogs from the early 80's have any info on this?
Thanks in advance.
Happy Thanksgiving to the Stateside gang!! In addition to the good things
we are given in life such as family, friends and the life we have, give
thanks for our ability to keep and study the old computer and electronic
technology: hobbies we are fortunate to enjoy.
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt_at_netsync.net
Member of Antique Wireless Association
URL:
http://www.ggw.org/freenet/a/awa/
Received on Thu Nov 26 1998 - 10:43:47 GMT