On 7/20/10, Rob Jarratt <robert.jarratt at ntlworld.com> wrote:
>> With a serial port, you can turn an old machine with two serial
>> interfaces into a snooper...
> RS-232 is such a pain, I just had some problems recently. I had never
> thought of using my PC as a way of snooping serial traffic. I have two
> serial ports on my machine. Does anyone know of any good software to do
> this? I could always write it myself, but it would be nice if there was
> already something there.
Here are several:
Some of these use one port and a special sniffer cable, some use two
ports. There are other sniffers out there, I'm sure, but these were
the ones that took less than two minutes to find. I haven't used any
of them, so I can't recommend one vs another. I have commercial-grade
gear for this (HP4951), but with all the options out there, you should
be able to find a PC-based one that does what you need.
I am looking for a pinout or datasheet for a chip labelled M51976FP. It
appears to be made by Mitsubishi, it's a SMPSU controller in a 20 pin
I have the data on the M51977, which is similar (I think), but some pins
are clearly different.
Looking on datasheetarchiver and digchip didn't find anything. And a
google search (as ever) found plenty of people who sould sell me 100000
of them, but nothing else).
[It's uised in a PSU modile in an HP tape drive that I am working on, so
it does have som relevance to classic computers0.
Thanks in advance for any help
> [mailto:cctalk-bounces at classiccmp.org]On Behalf Of Patrick Finnegan
> Sent: Sunday, July 25, 2010 10:43 PM
> Subject: Re: Lot of PDP-11/84 on ebay in Boston
> I would expect no more than $5/lb (probably less) for that
> era of board
> or about $5 or less per board in scrap value. The rest of
> the chassis,
> maybe $5 in value without spending a lot in labor to separate
> the metals
In North West New Jersey scrap high density circuit boards are $0.70 per pound. Steel is about $200 per ton.
On 7/30/10, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
>> One of my "hobbies" (some
>> might call it an obsession) is figuring a way to pronounce any given
>> acronym as a word....
> I've been know to refer to the 5150 as the 'I-Bum Puck' :-). The first
> 'I' is short --'e' not 'eye' as I pronounce it...
Here, I've heard "Ih-bem Peck" (same 'i' sound you describe), but it
was usually used in a less-than-flattering context.
The most gratuitous example of this I can recall is the Sesame Street
character Big Bird attempting to pronounce the 26-letter Western
alphabet as a single word
A few of you might remember the IBM LPFK bulk-order a couple of years
back, and the ensuing chaos of figuring out the control protocol (which
was eventually resolved when Michael Brutman found some old IBM protocol
docs which covered the LPFK).
I figure I've been sitting on the code for long enough: it's time to
make a proper release!
Anyone who wants to have a play with this is welcome to do so: the code
is on my website, under "Code :: liblpfk", or if you'd prefer a direct link:
I've also uploaded my fork of Eric Smith's "tumble" utility, a
TIFF-to-PDF converter. I found a couple of bugs (which haven't been
fixed seven months later) and figured it was a shame not to share the
patches. After all, it is open-source :)
URL for that is http://www.philpem.me.uk/code/ -- click "Tumble". At
some point I'll give this a separate page instead of just linking to the
version-control repository, and may well document the control file
format (which IIRC isn't documented at the moment).
Somewhat offtopic, but I've also released a driver for one of the
Brother P-touch label printers. I needed labels for my spare parts boxes
and really didn't feel like making them with a Dymo gun when I had a
perfectly good stock database (which is next on the 'stuff to release'
list) which I could use as a data source for said labels. Work smarter
not harder and all that ;)
These were written for Linux, but should work decently well on BSD too.
Forget running them on Windows unless you want to port the serial-line
(liblpfk) and/or usb-lp (libptouch) stuff across... I didn't (this be a
Linux-only ship, yarrr!)
Comments, criticism and so on should be sent to the address below.
Sensible patches are, as always, gratefully received 8^)
FYI: I'm working on getting a copyright release from university for the
DiscFerret software. At the moment most of the Department of Computer
Science is on holiday so this is proving somewhat difficult... PCB
design is still ongoing, though a lack of funds means it might be a
while before I get prototype PCBs made.
I'm hoping to release the firmware, microcode and decoder engine under
the GPL or LGPL, and the hardware access library will most likely be
distributed under a "BSD-with-attribution" type license (I forget, is
that 3-clause or 4-clause?). Either way, it'll be GPL-compatible (for
obvious reasons!) and commercial-use-allowed.
classiccmp at philpem.me.uk
This appeared on the cbm-hackers list today. Anyone have a thought on it?
----- Forwarded message from William Levak -----
Subject: re: Anyone know what type of plastic Commodore computers are
I have looked at the retr0brite website, and gone throgh all the
It is my opinion that this procedure has not been adequately tested, and
there is a possibility that this procedure may cause long term damage to
I am a chemist and have some experience testing resins.
The retr0brite information mentions a white "bloom" on the plastic from
over treatment. This condition is permanent. It also represents chemical
damage to the plastic.
A common procedure to determine the chemical resistance of polymers, is to
put various reactive chemicals on the surface and determine whether, and
how much time it takes for noticeable chemical damage to occur. This
usually shows up as a white "bloom", but this is not the only damage.
Polymers can also suffer damage that is not visible, but causes the
polymer to lose its strength and prematurely "age".
The retr0brite information says that you should be careful not to over use
the chemicals so that the white "bloom" does not occur. But this does not
necessarily mean that chemical damage has not occured. If it takes x
amount of time to create the white "bloom", then using it for half that
time probably means that half the damage has occured. Whether the damage
is visible is not the real question here.
It would take aging tests to determine whether the plastic is damaged from
the retr0brite procedure. I do not see any indication that retr0brite
treated plastics have been subjected to aging tests.
-------- Original Message --------
>> From: "Stingray"
>> Sent: Friday, July 23, 2010 10:37 PM
>> Subject: Anyone know what type of plastic Commodore computers are
> manufactured from?
>> Anyone know specifically what plastic the C64 and C64C are manufactured
>> I have been wondering how to stop plastic Commodore gear from fading.
>> I found a really good link on this (also explains why some of the keys
>> on your C64C are faded and some aren't).
>> http://www.vintagecomputing.co...chives/189 [ this was truncated in the
original message for some reason ]
>> Does anyone have any of their own tips on maintaining plastic
>> Commodore equipment?
Message was sent through the cbm-hackers mailing list
----- End of forwarded message from William Levak -----
------------------------------------ personal: http://www.cameronkaiser.com/ --
Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
-- We shoulda bought a squirrel. -- "Rat Race" --------------------------------
Walter F.J. Mueller <W.F.J.Mueller at gsi.de> wrote on 21 Jun 2010 21:02:18 +0200
> I'm in the middle of homogenizing some internal interfaces and of some
> code cleanup, also the backend handler needs a re-write in C++ (currently
> perl). When that's done I'll make the whole package (VHDL sources, test
> benches, backend) available on 'OpenCores'.
The PDP-11/70 core is now available at OpenCores, see
The documentation is admittedly still rudimentary. The backend handler is
still in perl. This and many other things on the TODO list for the future.
I have been fortunate in acquiring and restoring a Tek 4051 recently.
I had used one of these back in '77 to '82 and I still have some
documentation, and I found other manuals on bitsavers.org but have not
located any software. Do you know of any source on-line? I found
references on this site (Feb. 2009) from other users talking about
building an archive of software for the 4051.
I have keyed in a few short programs to test the vector graphics, but it
would be nice to have the original standard pack tape programs. Even
printouts would be helpful. I recall when I last used a 4051 back in
the early '80's we had the ability to dump & load programs using the
serial port, and the ability to un-secret the programs. If I can find
this information again I would be glad to provide it to help build a
software library for this fantastic system.