Available for one who wants it, a Dec H960 rack.
No sidepanels, nor a masthead.
Note, the rack is in the Netherlands.
Will go to the scrappers at the end of June.
--
Dit is een HTML vrije email / This is an HTML free email.
For some Computer History Museum work I need information on 7400 series Flip
Flops (S and Normal, DIPs) circa 1973 (anything 1970-75). Anyone have any
maximum clock speed and OEM volume pricing information on parts such as 7473
thru 79 or 74106-116?
I must be getting old because I remember the 7474 well but I thru out my
Yellow books years ago :-)
Thanks
Tom
Hi! Thinking about this some more, we already have simple Z80 with RAM/ROM
circuits and 8255 PIA for I/O including circuitry for 8255 to IDE.
The only new element of this design would be converting a pair of 8255 PIAs
to SCSI-2. Looking at a pin out of a SCSI-2 pin out of the 68 pins, 34 are
grounds and a few more are power related. Basically it is about 30 pins
which actually do anything and of those 24 are data lines. This does not
appear to be a difficult interface to "bit bang" and would be somewhat akin
to the 8255 to IDE circuits.
Yes, performance would just OK and not fast. I think it would probably work
and be fairly cheap to make. I am willing to support other approaches but
would like to just help with the schematic capture, PCB design, and
prototype board development. The key to success is to keep it simple and
easily understood. Adding a bunch of unnecessary complexity just dooms the
project IMO.
Please contact me if interested. Thanks and have a nice day!
Andrew Lynch
I canse anyone has not heard this...
I have been informed that Professor Sir Maurice Wilkes (designer of
EDSAC, etc) passed away yesterday (29th November 2010).
:-(
-tony
Anyone want a 17" SGI monitor? It's a Sony GDM-17E21 in "granite", as
used on an Indy or O2. Has HD15 and 5xBNC connectors. It's off the O2
on my desk, but I now have a set of flat screens and no room to keep
this CRT monitor. Collection is free from York UK -- sorry, but it's
impractical to ship.
--
Pete Peter Turnbull
Network Manager
University of York
I am looking for any of the following SCSI hard drives please:
Micropolis 1578-15 50-pin SCSI 5-inch full-height 332MB
Micropolis 1684-07M 50-pin SCSI 5-inch half-height 340MB
or any Unisys branded SCSI drives.
Some appear on eBay but the seller prices exceed my budget, especially
once shipping costs to Australia are included, so looking for someone
who might have some of these drives that they would like to part with
for a modest price+postage costs.
thanks.
