>Thanks to Martin for grabbing 14 DEC terminals from me last week -- very
>pleasant to meet someone who is still working with PDPs and real terminals
>in the wild!
>I've just passed our waste electrical skip at work and noticed that
>someone has dumped a PDP-8/e box in there. I'm being imprecise about this
>because I've never seen one before. This isn't a big rack, just a single
>heavy box fronted by an orange and brown PDP-8/e front panel. I assume
>it's the processor itself. If I can chuck this in my car this evening,
>would anyone here be able to pick it up from me by the end of this month?
Oh man, I am really interested but I really wish I didn't live in Western Canada ;_;
If I knew someone close to you I would ask them to pick it up for me and then ship it in chunks but even then it would still be expensive.
Hey folks. I'm looking for schematics for the Lear Siegler ADM-5
terminal. I don't see anything related on Bitsavers, which surprises
me. Would anyone have this handy?
Port Charlotte, FL
I'm trying to revive an EPROM programmer:
the bottom label says
Memphis, TN USA
but the inner label says
P/N OMNI05, V7.0, R0.0
(C) 1986, SherTek Inc.
It has 28, 40 pin ZIF sockets on top,
internal power supply.
But the only interface is for the PC's parallel port
so I'm unsure what protocol it uses
to read back the results.
I'm missing the floppy with OMNI.EXE
the DOS program that ran it.
The manual only documents the program menu,
not the parallel port protocol.
-- jeffj at panix.com
DEC PDP-8/L Users Handbook (1968).
My father was the original owner and he wrote his name on the front
cover in Magic Marker, and a couple of other scribbles here and
there.Overall good shape. Pages are turning brownish like all old DEC
$10 shipped within the US. Overseas pay actual shipping cost.
Please contact me offlist if interested.
This is classiccmp-related in that I am repairing an old HP
'Multiprogrammer' (a modular input/output system for HP2100s, HPIB
machines, etc). While dismantling it I had one screw shear off and had to
drill out pop-rivets holding a heatsink to the side casting.
So waht I am looking for is a source of small UNC nuts and bolts in
reasonable quantites. 'Small' means 4-40, 6-32 and 8-32. I would be
looking for countersunk and pan head scewws, nuts, lockwashers, etc.
'Reasonable quantities' would be a bag of 100. These are not at all
common in the UK, we tend to use BA (older machines) or metric (M3/M4
Does anyone know a company who can sypply these to the UK? Preferably one
based in the UK (to save on postage charges), but there's no real problem
with shipping a ag of nuts and bolts from anywhere.
I just picked up one of these old CP/M boxes but, I've been unable to
locate any software for it or documentation. They ran a custom version
of CP/M called OS8MT and came with a few different software packages.
They were made around 1984 I think.
Old-computers.com has a little bit about it if it helps ring any bells.
If anyone knows of a source for any of these disks or docs I would love
to know about it. The system is in excellent shape and the monitor clear
and sharp. Really a shame for it to not be able to do anything but, hold
my doors open.
>Date: Sat, 1 Nov 2008 07:11:58 -0700 (PDT)
>From: Cameron Kaiser <spectre at floodgap.com>
>> Anyone know of a decent memory test utility that runs on classic macs (68k
>> I have an old Mac Portable that I'm struggling to get an OS on -- I
>> consistently get "bad F-line instruction" traps when booting from System 7
>> disks (floppies and CD-ROMs), which from what I can tell probably means bad
>> memory. I'd like to find out if it IS memory, and if so, whether it's the
>> onboard 1mb (I hope not) or on the 4mb expansion...
>> My internet searches have come up dry (I've found stuff for OS X, and early
>> PowerMacs, but nothing for the 68k line).
>If you can find Snooper, I think it has a RAM test tool in it that will work
>and does not require the Snooper NuBus board to be installed.
RAMometer from (OOB) NewerTech works on older Macs. I know it will
work on 68030 Macs. I'm not sure if it will work on 68000 based
Macs. It might need the PMMU. I think there's a copy in my
If you can't boot the OS, you'd be hard-pressed to run a memory test.
As you already suspect, that error strongly suggests a hardware error.
Assuming the memory is not soldered to the motherboard, the first thing
I would do is to re-seat the memory. If that doesn't work, I'd try
some of it, and try different combinations of memory cards to see
if some subset works. Usually memory from that era needs to be
added and removed in pairs, and needs to positioned in the right slots.
On Nov 1, 2008, at 5:09 AM, cctalk-request at classiccmp.org wrote:
> Message: 26
> Date: Fri, 31 Oct 2008 17:24:54 -0400
> From: "Joshua Alexander Dersch" <derschjo at msu.edu>
> Subject: Memory test util for classic macs?
> To: cctalk at classiccmp.org
> Message-ID: <E1Kw1UE-0002Q9-LD at sys27.mail.msu.edu>
> Content-Type: text/plain; format=flowed; charset="utf-8"
> Anyone know of a decent memory test utility that runs on classic
> macs (68k
> I have an old Mac Portable that I'm struggling to get an OS on -- I
> consistently get "bad F-line instruction" traps when booting from
> System 7
> disks (floppies and CD-ROMs), which from what I can tell probably
> means bad
> memory. I'd like to find out if it IS memory, and if so, whether
> it's the
> onboard 1mb (I hope not) or on the 4mb expansion...
> My internet searches have come up dry (I've found stuff for OS X,
> and early
> PowerMacs, but nothing for the 68k line).
Geez, the 419 was uncommon, even in it's own time. And then,
most of the ones I saw didn't work. If you don't mind 'wasting'
part of the drive, I would think just about any 6-headed mfm
drive would work.
There's some difference (which I have been unable to quantify)
between different models of MFM drives (of equal or similar
geometry) that allows some drives to work in some applications,
but not others.
If there's anyone out there intimately familiar with the
ST-506/412 interface, now would be a good time to offer
some suggestions as to why this is so.
-- Jos Dreesen / Marian Capel <jos.mar at bluewin.ch> wrote:
I am in the market for a known working ST419 MFM disk
System software forces me to the 306 Cyl / 6 Heads format (@ 32 256-byte sectors )
Location : Switzerland .
Get the party started with a huge selection of quality party supplies. Click now!
Date: Fri, 31 Oct 2008 16:30:49 -0500
From: Chris Elmquist <chrise at pobox.com>
Subject: Re: Looking for a ST419
I'm new here so I apologize for opening this old can of worms :-)
That's the path I've been on. I envision over-sampling and then just
playing and recording what was sent to the drive. I'd make no attempt
to go inside that datastream and try to interpret what was read or
If entire tracks were always written, then it seems rather straightforward
to just store track images and play and record them as they are seeked
Ya... so, again I'm new here :-) But I'll go away quitely and think about
this some more-- knowing now that I can't cheat and do tracks at a time.
Oh, I don't know; that's all it'd take to make a few of us Cromemco folks
with failing MFM drives happy...