On Dec 30, 15:07, Richard A. Cini wrote:
> I'm going through some random sheets of semiconcuctor chips I
have in stock
> and came across the following numbers I can't identify
> COM5016/SMC8013
Baud rate generator
> LMC6494BEN (National, date 9724)
Quad opamp
> UM4382A (UMC, date 8802)
Sorry, don't know.
> MK5175N (Mostek, date 8425)
Ten-number dialler for a phone.
> Then, I found a DS8836 line receiver chip (120 ohm line). What
was this
> used for?
It's a common bus receiver, often used as a pin-compatible replacement
for the 8640 used by DEC (the 8836 is lower current and higher noise
immunity).
--
Pete Peter Turnbull
Network Manager
University of York
Ok all, since the IBM Cluster adapter thread started pulling some threads, I thought I would ask if anyone happens to know of the whereabouts of a Racore power supply that used a DB9 connector to hook into the Racore chassis !!! This is different of course from the standard IBM power supply adapter that powers the PCjr and the Racore Drive II 5.25/3.5" drive kits. One would be greatly appreciated, or schematics on how to convert a PCjr power sidecar brick into a DB9 capable alternative!!!!!
Brian
---------------------------------
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I've been reading over the datasheets for these four chips and have come
across a difference.
On the WD1771:
During the verify stage of a type 1 command, it will only check the
track number against the first ID record it finds. If the ID record has
a CRC error, it will set the CRC status bit and set the INTRQ. If the
Track field doesn't match the Track register, it will set the seek error
status bit and set the INTRQ. Otherwise it will just set the INTRQ.
It will not go looking for another IDAM.
The WD1770, WD1772, and WD1773 search through five revolutions of the
disk until it finds an ID record with the correct track value and a
correct CRC value.
Since I only have 1773s in my collection I can't test if the 1771
actually behaves this way. Does anyone know if the datasheets are
correct in this case?
Also, does anyone know how long the index pulse lasts for 8", 5.25" and
3.5" disk drives?
--
tim lindner
tlindner(a)ix.netcom.com Bright
Hi:
I'm going through some random sheets of semiconcuctor chips I have in stock
and came across the following numbers I can't identify and they aren't in
the 1994 IC Master books that I have.
COM5016/SMC8013
LMC6494BEN (National, date 9724)
UM4382A (UMC, date 8802)
MK5175N (Mostek, date 8425)
I also found the following chip which is some sort of high-current driver
that I'd like to get the data sheet on: NE5090.
Then, I found a DS8836 line receiver chip (120 ohm line). What was this
used for?
Thanks.
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
It would seem (at least to me) that while H960 racks are not all THAT
uncommon to find, the side panels are. Seems most of the ones I've seen "in
the wild" (and all the ones I have), do not have the grey side panels.
I believe I have seen others mention a lack of those side panels as well. I
would like to find one or two sets (of two) side panels. Does anyone have
spares? I know they won't be terribly cheap to ship. However, a friend of my
dads owns a large metal fabrication/welding place. If none can be found, I
was going to have him make me a set. If I go that route, and others are in
need, I could have him make extras. He would charge to do it, but I'm sure
it would be the "good guy" price.
Any thoughts?
Jay West
I have a friend whose business is about to die due to the lack of a
Procom CC-8 SCSI Enabler. If anyone has a spare one that they would let
go of, please let me know.
Claude Ceccon
On Mon, 29 Dec 2003 09:02:19 -0800, "Shannon Hoskins"
<pds3(a)ix.netcom.com> wrote:
> Is the DEC stuff still up for grabs?
I have takers for all the DEC parts. However, in all cases it's
dependent on shipping costs, etc. Still working on it. I'll put you in
line...
CRC
Hey all,
There are several items I'm looking for, these include:
PDP8A cards:
M8315 - CPU
M8316 - DKC8 Option Board #1
M8317 - KM8A Option Board #2
M8416 - KT8A 128K Memory Management Option
G8019 - BA8C Power Distribution Board
M8357 - RX8E - RX01/RX02 Omnibus Controller
Floating point cards for the 8A
E&L Items from the 70's or early 80's:
E&L outboards
Generally any E&L bread-boarding item
E&L doc's
MMD-1 or MMD-2 systems/docs
MMD-1 or MMD-2 add-on modules such as the EID-1
MMD-1 add on card (adds memory, cassette I/O etc.)
-Neil
