> hi,
>
>> (the chip in question is a ST9293J9B1/AEL for the record,
> What is this TV model & brand?
It's a Ferguson T7073SJD, using an ICC9 chassis. One website containing a
faults database listed the failure of that chip giving the exact symptoms that
I see (no sound when the set warms up and the remote operation goes
unresponsive).
I've pulled the main board and will re-solder all the joints in that area just
to check; there's only one electrolytic as part of the circuitry surrounding
that chip but I'll replace it with a known-good just in case. Tony's point
about the crystal was interesting - I didn't think those things ever failed.
I'll see if I've got a spare to try anyway.
The set's awful inside - very cheaply made with little thought to cable runs,
connectors, and how the various boards plug together. Guess they must have had
different teams working on different sections and management for the overall
project wasn't exactly what it should have been... (typical of more modern
equipment unfortunately!)
cheers
Jules
For a better Internet experience
http://www.yahoo.co.uk/btoffer
>From: Ethan Dicks <erd_6502(a)yahoo.com>
>--- "Dr. Charles E. Morris" <c.morris(a)townsqr.com> wrote:
>> registers... Ethan Dicks has pointed out that I should look at the
>> drivers in OS8 and TSS8 to see if this will be a compatibility problem.
>>
http://www.ibiblio.org/pub/academic/computer-science/history/pdp-8/os8/os8.…ftp://ftp.dbit.com/pub/pdp8/tss8
>As I mentioned earlier, I've only done some basic DF32 twiddling
>from a PDP-8/i to prove that the interface mostly worked (and to
>diagnose my repairs of a smoked rotation sensor board). I've never
>had the joy of an 8K machine + DF32s, so I've never had an OS to
>explore them.
>
4k and 1 DF32 is enough for Disk Monitor System. I built an image with the
standard programs and put it at
ftp://ftp.pdp8.net/software/dms/
The paper tapes images to build it and the manual are pointed to in the
readme. It was installed for 8k since my 8/i is 8k but can be installed for
4k. I also have programs to dump and restore DF32 images over the console
port. They aren't online yet since they need a little more cleanup but I
can send you a copy.
Let me know if you need any help.
David Gesswein
http://www.pdp8.net/ -- Run an old computer with blinkenlights.
Well, I am mainly into pdp-8 and pdp-11. Those were my first computers when in high school and college. But pdp-10s also interest
me. Actually anything pdp related might get my interest. I have a pdp-8e, pdp-11/34a, and a pdp-11/84e. One day I hope to have a pdp-8i
as that was the first computer I ever used. I am still working on getting all my systems fully operational. The 8e will have a dual
rk05 drive connected to it. The 11/34a will have an RL02. I am not sure what the 11/84 will have as I have only had it a short while.
Tim Radde
>Well, let me be the frist so say "hello" & welcome aboard! Yes, >you'll
>like this place, it can get intresting, some of the discussions get a
>little off on a tangent, but aside from that, I've learned a whole >bunch of info I never would have known.
_______________________________________________
Join Excite! - http://www.excite.com
The most personalized portal on the Web!
I was sending blocks of data to and from my DF32x4 emulator when I
noticed that Bit 5 was always writing a zero to the disk - turned
out to be a bad bus driver (M623 in slot D28) and I found a short
>from collector to emitter of the output switching transistor.
After destroying the transistor removing it, I found out the
clamping diode was the actual shorted part :^P so after replacing
it with a 1N4148, I grabbed the nearest 2N3904 switching
transistor and put it in. Guess what - Bit 5 still didn't work,
although it was now changing states!
To make a long story short, I found that the rise time of a 2N3904
is reasonably fast (around 50 nS) but the storage time in the
circuit DEC used (a 7402 NOR gate driving the transistor base
through 390 ohms) is on the order of 500 nS. (Once a bipolar
transistor is turned on, there is a significant time required to
extract the charges from the base so it will turn off, especially
if a negative drive voltage is not available). Although the 7402
output waveform was square, this particular transistor base
voltage was dropping much more slowly than any of the others; I
could see on the scope that this made the BMB5 output change from
0 to +5 volts AFTER my disk circuit wrote the data into the NVRAM!
Some research through the data books showed that a 2N5769, for
example, would have been a much better replacement, with a storage
time spec of 13 nS. Fortunately, after a little experimenting with
"peaking" capacitors across the 390 ohm resistor, an 820 pF gave a
sufficiently fast turn-on and turn-off with the 2N3904.
So the object lesson here is that all switching transistors are
not created equal, even in 1960's technology! Naturally since the
DEC part numbers are no longer available, some thought is needed
before just deciding on PNP or NPN...
-Charles
(Relearning long-dormant EE skills!)
Hello all,
This morning I picked up some Dec stuff :
1x Alpha 400/166 + 1 Dec storage tower running Unix
1x Alpha 400/166 + 1 Dec storage tower running NT
1 Infotower/infoserver 1000 with 5 CD-Rom's
1 Vax 4000/100
With it came a box of cables, for which I have no idea where they
can be used for. One of the cables is marked BC18D-02 and is about
50cm long, the other is a cable which has on one end a sort of
high density connector and has a small block in the middle which forks
into 4 D25 connectors.
The vax 4000 has the female connectors at the back, am I right if these
cables are for terminals?
Thanks,
Ed
--
The Wanderer | Politici zijn onbetrouwbaar
quapla(a)xs4all.nl | Europarlementariers: zakkenvullers
http://www.groenenberg.net | en neuspeuteraars.
Unix Lives! M$ Windows is rommel! | Wie mij te na komt zal het weten.
'97 TL1000S |
I should have said Hello before my first post. I just found out about this list. It seems quite impressive and very useful. I know I will get much use from it. Hopefully I can answer a question ever now and then too.
Tim Radde
_______________________________________________
Join Excite! - http://www.excite.com
The most personalized portal on the Web!
This was heading out towards the dumpster today, so I grabbed it. From
what our network admin told me, this router is from the early 1990s.
It looks like Livingston made several varieties of these plain gray
boxes. The identifying markings on this one are very sparse, so I can't
provide much in the way of info about /exactly/ which model this is.
Dimensions are 3.2" x 16.8" x 11.5" and it weighs around 12 lbs. It has
a DB-25F console/diag port. It has another DB-25F port that's
switchable between RS-232 and V.35 (so, presumably, you could hook up a
slower serial device or a T1/E1 device to this). And then it has a
choice of RJ-45, BNC, or AUI ethernet port. The only identifying
marking of note apart from the "PortMaster Internetwork Router" on the
front is small label which reads "Model: IRX S/N: 1A13813".
Some info related to the Livingston and their products can be found
here: <http://portmasters.com/>.
This one does power up and I was able to get a login prompt by
connecting a terminal to the diag port with a null modem cable at 9600
8-N-1. The login and password are unknown. The condition of it is also
unknown, though it's believed to have been working when it was taken out
of service a number of years ago.
Available to the first taker for US$2 + shipping to anywhere in the US
or Canada from zip code 90232. It won't be until sometime next week
that I'll have the time to pack, estimate shipping, and send this out.
-brian.
See below and respond to the original sender.
Reply-to: <paulmoadib(a)aol.com>
---------- Forwarded message ----------
Date: Fri, 4 Apr 2003 19:17:39 -0800
From: Philip Baily <paulmoadib(a)aol.com>
To: vcf(a)siconic.com
Subject: VCF Feedback!
Do you know of anyone with a SOROC IQ 120 Terminal for sale? (I can offer
$100.00+ for it if is in good working condition.)
Also, I am looking for a copy of Northstar DOS / BASIC to run my NS
Horizon computer. Do you know of anyone who might be able to help me get a
copy?
Many thanks,
Phil Baily
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
This is a follow-up to a message I posted on Monday.
I am looking for some early (circa 1990) antivirus software made by a
company called Iris (maybe spelled "iRiS"). This may have gone under the
names of "Virus-Free", "Antivirus" and "Antivirus Plus" (sometimes in
combination with the company name "IRIS"). The software was distributed
by Iris and the software apparently written by Computers of Israel.
The iRiS software was included in the system software that came with an
Arche computer of the same vintage (1989-1990). It is the software that I
am really after but the computer also has some use.
If you tried contacting me about this but had your message bounce it was
because I was moving my server around. Sorry. Please try again.
I have posted bounties of $200 for the computer and $100 for the software.
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
hi,
this is sort of off-topic as it applies to my TV and not a computer, but I bet
some of the folks here can offer advice... :)
the microcontroller in the set seems to have developed a fault which only
appears when the set's warm. Tracking down a replacement seems to be easier
said than done as the chip was obviously discontinued a while back (and then
I'd have to worry about the on-board ROM anyway).
At the moment though there's no heatsink on the chip - if I do stick a heatsink
on it in the hope that it keeps it cool enough to operate, is it still likely
to fail at a later date anyway? Once a chip's started to exhibit heat-related
problems is that basically the end of it even if something's done about the
cooling? I figure some of you people will likely know about these things :)
(the chip in question is a ST9293J9B1/AEL for the record, but no infomation
appears to exist on the web or on ST's site for it; wish I could get pin-outs
to check that it is the chip and not surrounding circuitry that's failing)
cheers!
Jules
For a better Internet experience
http://www.yahoo.co.uk/btoffer
Further information ..
The FACIT tape drive can be used an a PDP 11/34, see ..
www.tno.nl/instit/fel/museum/computer/en/comp783E.html
The AMPEX hard drive is 10MB, ST506 interface, full height
5.25"
Lee.
________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________
Tony Duell provides us with an exemplary indicator of the true
collector:
>
>and give you a nasty (and possibly fatal) shock, or worse still do
^^^^^^^^^^^^^^
>serious damage to said classic computer.
>
Collectors are many; vintage computers, few!
;}
Cheers
John One-Hand-In-Back-Pocket-At-All-Times Lawson
>From: ard(a)p850ug1.demon.co.uk
>
>> MTR-90 is in the ROM on the 89's CPU board. My MTR-90 manual indicates
>
>[...]
>
>> It certainly seems as if you can run both controllers in one machine.
>
>You most certainly can. My Z90 (essentially the same machine -- AFAIK the
>differences are that it came fully assembled ('Z', not 'H'), and came
>with 64K RAM, has MTR-90, the hard sector controller and the
>double-density soft sector controller. The former is cabled to the single
>built-in drive, the latter to an external drive box.
>
>It will boot either HDOS or CP/M, and can use both types of disks
>
>-tony
>
The Z90 is built to be 64K a H89 isn't. As far
as I recall, the H89 took more than a simple jumper or
switch to make it CP/M compatable.
Also, one should note that HDOS came in both hard and soft sectored.
Dwight
The ibm 5161 expansion box was designed for use with
the ibm pc.
the pc had fewer slots then the later released pc xt
and it's power supply was too small to handle a hard
drive.
the exp box added a hard drive to the system and
provided extra card slots ( i think the box also had
additional bios or came with an extra fixed disk rom
chip that went into the pc).
the card that connects to the ribbon cables that come
>from the exp box goes into one of the pc's card slots.
i cannot remember if it is slot specific or if it can
go into any slot - there is a plate on the pc's back
that removes to allow the ribbon cables to exit the
case.
a local retired ibm ce had asked me years ago if i had
ever seen one - as he was looking for one at the time.
i was told that the expansion box was a little rare
because, shortly after the pc was released that pc xt
was released .
the pc xt has a large enough power supply to support
a hard drive as well as the bios to operate one and it
has eight card slots.
Bill
Message: 44
From: "Witchy" <witchy(a)binarydinosaurs.co.uk>
To: <cctech(a)classiccmp.org>
Subject: IBM 5161
Date: Mon, 31 Mar 2003 20:25:09 +0100
Reply-To: cctech(a)classiccmp.org
Hi collecting folks,
A surprise consignment arrived for me this morning -
an IBM 5150 in not
bad
condition complete with keyboard/monitor and a 5161
expansion box,
spare
expansion card and 2 extender cables.....reading the
classiccmp
archives
back to 1998 makes me think I should be impressed
since the 5161 isn't
that
common? It all apparently works but I won't be able to
set it up fully
till
tomorrow. Not much info about it on the web either,
though because 5161
is
obviously bits of a phone number there's a very high
signal to noise
ratio.....
cheers
--
adrian/witchy
www.binarydinosaurs.co.uk - the online computer museum
www.snakebiteandblack.co.uk - monthly gothic
shenanigans
--__--__--
I have this cool little Psion Organizer II, model XP available. It's a 6800
processor powered handheld computer. I have the COM link cable and a 32K
Datapak. It appears to be functional. It was made in the UK. Someone out
there probably knows the history of this little device.
Best offer, please send zip code for shipping costing and I prefer Paypal.
Thanks Norm
I have surplus to requirements the following..
FACIT tape drive
Model No. 4203
Prod. No. 9281 01 09
.. and ..
AMPEX hard drive
PYXIS 13
Part No. 3315422-01
Both are of unknown status having been stored in a
garage for at least a decade and both show some
signs of having been damp at some time (some
corrosion).
Both are heavy so will cost to post.
Anyone interested in these please contact me off list.
Lee.
________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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________________________________________________________________________
>I've got a Power Computing 100, one of the earliest Mac clones
>(equivalent to Mac 8100/100, though the logic board is physically
>different). It seems that its power supply has died. It is a Seasonic
>SSH-200G. I'm pretty ignorant about PSU standards, so am not sure what
>I need to look for in a replacement -- a friend said "it looks like an
>AT power supply, but that little 4-pin plug [which connects to the
>logic board, I think] is non-standard, so a standard AT PSU won't work
>as a replacement." It also has two large 6-pin plugs that plug into the
>motherboard as well. The rest of the plugs are standard 4-pin.
If you find out any info, forward it on to me. I recently aquired one of
those as well, and the power supply, along with every other cable in it,
has had all the wires cut.
It looks like someone either was fired and pissed off, so they took their
revenge on the machine, or more likely (since the hard drive is missing
as well), the machine was officially "decommissioned" and rendered to an
unusable state to take it off the books.
Before I go thru the effort of patching the leads together, if I can find
a suitable, available replacement, I'll go that route for the purpose of
testing it to see if the system has been damaged in other ways (then if
it works, I'll go back and patch the power supply together, just because
it will be fun).
I did ask a Power Computing list if the Power100 used a standard AT power
supply, and was told that it does not. However, the person that gave me
the response spent no effort discussing how it differs, but did spend 3
paragraphs telling me not to waste my time with a Power100 and instead to
buy a used PowerTower Pro. So that told me that they just didn't get it,
and didn't understand the interest in reviving an old machine... which
also makes me suspect the validity of their answer (not that failing to
understand old computers equals a lack of knowledge of the power
supply... just that it seemed more like an uninterested/uninformed wave
off of the power supply question in the effort to push me to a newer
faster machine).
-chris
<http://www.mythtech.net>
Re: recent discussions
Found this in section 14.38 of the VMS FAQ:
http://h71000.www7.hp.com/wizard/faq/vmsfaq_016.html
The protocol definition for the old DIGITAL keyboard and mouse interfaces
is buried at the back of the QDSS section in the old VAXstation II manual,
specifically, in the back of the VCB02 Video Subsystem Technical Manual
(EK-104AA-TM). The keyboard wiring and protocol is in appendix B, and
occupies circa 44 pages. The mouse is in appendix C, circa 12 pages.
... in case anyone wants to tackle a protocol converter.
-ethan
My "DF32x4" disk emulator is alive and talking to my 8/L and appears to be
reading and writing blocks of data correctly. There are a few instructions
that I did not implement (e.g. the "Maintenance" IOT's 6631-4 which the
manual says are only used in "diagnostic programming". Also the DCEA
instruction does not clear the extended address and EA registers - it would
have taken quite a bit more logic to implement and there was no more room on
the PC board; additionally the DEAL instruction would be used anyway, which
combines the clear action with a load of these registers from the AC - so
the clear would be superfluous. The DEAL and DEAC load/read register
commands are, of course, implemented).
Ethan Dicks has pointed out that I should look at the drivers in OS8 and
TSS8 to see if this will be a compatibility problem (i.e. they may expect to
be able to clear EMA and EA for some reason, rather than loading them from
the AC). Can anyone tell me where to find the source code so I can verify
this?
Also, I would love to have a paper tape copy of 4K Disk System Builder to
start a build of Disk Monitor from scratch (I already have a copy of a DF32
build thanks to David Gesswein). Anyone?
thanks
Charles
Now for something strange:
Who of you has ever heared about a Ebka Industries Familiarizor 6502
I have just seen this little beast at ePay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=3409229078
Now, doing a quick search, nothing did show up, except a very
short mentioning in Hans Pufals list.
Any other info around?
Gruss
H.
--
VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
http://www.vcfe.org/
Well okay then! I dug around in the pile of old Macs in the basement
and found an identical 3.6v mb battery, which tested good...stuck that
in there, plugged old PSU back in, and it boots! Hooray!
Thanks for all the help, everyone! :) (Sorry Chris, guess I won't be
getting parts to share with you now...good luck with your Power 100
repair project.)
-- MB