Does anyone know of a source for replacement
lamps for a PDP-8/E console? I have an otherwise
immaculate console board that I would like to
use in its original condition, e.g., w/o an
LED conversion, but one of the bulbs has been
broken, and, at any rate, additional failures
are likely.
Thanks,
Bill
To Whom it May Concern,
I have some old Tandy computer equipment and many secondhand 8" Disks. I have been told that you might be interested? Who are you and what do you do?
My name is Les and I live in Plymouth.
Les
>I'm trying to figure out what this board is/does. It's a DEC hex height
>board marked M8597A. On the back it's also marked PDP 8A Control.
DX10, PDP8 interface
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com |
| Member of Technical Staff | megan at savaje.com |
| SavaJe Technologies, Inc. | (s/ at /@/) |
| 100 Apollo Drive | URL: http://world.std.com/~mbg/ |
| Chelmsford, MA 01824 | "pdp-11 programmer - some assembler |
| (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
Message: 2
Date: Fri, 5 Mar 2004 08:00:09 -0500
From: "Brian Mahoney" <brianmahoney(a)look.ca>
>Almost a year ago, April 24, 2003, the Toronto Star did an article on
>collecting featuring myself and Kevin Stumpf. Even though the guy took lots
>of shots in my basement, regretfully only Kevin made the big time, standing
>in front of his ex-Ontario Power Generating IBM 1800. (Maybe it was
>because
>he had a tie on and I didn't.)
>We got the whole back page of the Technology Today section, well ... except
>for a gigantic Canon ad. Kevin's site was mentioned as was my own
>collector's list at Geocities (which everyone here should be on!)
>If there is any interest, I could scan this aticle and put it up on my site
>for a bit.
>BM
Ping!
By a staggering coincidence, the 1800 mentioned (which is mine - Kevin had
been storing it for me) finally showed up at the Corestore today, in a very
large truck! I'll be updating the web page below with more photos tomorrow
night.
A couple of the pics from the article mentioned (I presume the same article)
are at:
http://www.corestore.org/1800.htm
If I can get my arse into gear and this thing running, I'll drag it to VCF
East... IPL diagnostics from punched cards, wheeeeeee! :-)
Mike
http://www.corestore.org
_________________________________________________________________
Learn how to help protect your privacy and prevent fraud online at Tech
Hacks & Scams. http://special.msn.com/msnbc/techsafety.armx
>> IIRC, its also used on the Apple DOS cards. I'd have to go check a cable
>> to be sure, but I'm pretty sure its 26 pins, in a DA shell (same size
>> shell as AUI uses)
>
>That's not correct. The size of the shell is between a DA and DB, and it
>has 19 pins.
Are you sure? Are you thinking of the same cable that I am?
I just did a quick check, and I found via Google a page that gives the
pinout for the Mac's PC Compatibility Card's cable. It shows it as a 26
pin connector.
I'm no longer at work where my cables are, so I can't physically inspect
them. I thought the connector on the DOS Compatibility card was the same
"physical" connector that is on the PC Compatibility card (although the
cables, and I believe the pinouts are different). Again, I can't
physically check mine, so I can't be 100% sure. Maybe the DOS card
version was different (I know the cable for the DOS card is a 4 headed
cable as it breaks out the joystick via the cable, while the cable for
the PC card is a 3 headed cable with the joystick port residing on the
card itself).
And of course, Apple had a 3rd style card for the Performa 630/640 DOS
model. I haven't really played much with mine of that model, so I don't
know what it has (actually, I seem to recall that it didn't use a
loopback cable at all)
And then there are always the Orange Micro versions, all bets are off
with those. I've never really played with them.
But maybe you are thinking of a different card then I am. Apple also had
an Apple IIe card for the Mac that had a loopback cable. I don't recall
what it has for connectors. And I have no idea what possible cards there
were for the Apple II series, or what possible other similar cards were
for the Mac beyond Apple's, Orange Micro's, and Reply's (which was really
the same as the first Apple card as it was built by Reply and first only
available from Apple, later to be available directly from Reply)
-chris
<http://www.mythtech.net>
Hi Joe
The 7109 was made by many manufactures and is a common
A/D. It is a dual slope type. Quite accurate when comparing
to a reference. It has one funny feature that isn't usually
mentioned in the data sheets. If you get an over range,
it will transfer some additional energy to the Auto-Zero
capacitor. This can take many convertion cycles to recover from.
When used with an input mux, make sure that you either have
a wait after overrange or some way to clamp it below full
scale. Even a single lsb of overscale has significant effect
because of the amplification used to do the auto-zero. A single
lsb of overscale can be over 100 lsb's on the next read,
depending on the A-Z capacitor size. Not good when you are
looking to get the most out of the 12 bits.
As for the board, maybe just some tracing out will determine
the addressing so that you can play with it. I have a
80C188 processor board for the STD with a Forth in Flash
on it. I find Forth to be real handy for poking ( and peeking )
at unknown boards such as these.
Dwight
>From: "Joe R." <rigdonj(a)cfl.rr.com>
>
> Yesterday I picked up two shoebox sized units that were marked as
>"enviromental units". However they had lights marked Tx, Rx, etc and a Comm
>port. Inside it had a STD bus chassis with three cards installed. On has a
>80C31 CPU, one has a Zilog Z0853004 comm chip and the other has a MAXIM
>ICL7109CPL A/D convertor. The first two cards appear to be custom made and
>are probably useless for anything except the system they were designed for.
>However the third card (with A/D) is a standard commercail product and was
>made by WinSystems and is their model LPM/MCM-7109. Does anyone have any
>data on this card? It's not on WinSystems website and I tried to contact
>them and ask about it but they were less than cooperative.
>
> Joe
>
Yesterday I picked up two shoebox sized units that were marked as
"enviromental units". However they had lights marked Tx, Rx, etc and a Comm
port. Inside it had a STD bus chassis with three cards installed. On has a
80C31 CPU, one has a Zilog Z0853004 comm chip and the other has a MAXIM
ICL7109CPL A/D convertor. The first two cards appear to be custom made and
are probably useless for anything except the system they were designed for.
However the third card (with A/D) is a standard commercail product and was
made by WinSystems and is their model LPM/MCM-7109. Does anyone have any
data on this card? It's not on WinSystems website and I tried to contact
them and ask about it but they were less than cooperative.
Joe
Went scrounging today and found a BIG pile of computers. MANY Dell PCs
and a lot of IBM Power PCs. Brought home some of the PCs to check out and
found that they all have P-III CPUs and ranged from 500 to 866 MHz. Some
even had CD-RW drives! More interesting finds included two HP 9836Cs (the
color version of the 9836), a HP 9000 380 (Probably top of the line for the
HP 9000 200/300 series), a Sun Ultra 1 Creator 3D, a >>Hyundai<< Sparc
model HWS-S310 (I had no idea Hyundai built andything like this!), a Matrox
Shark 10/100/FX Ethernet switch, a SUN SparcStation 20, a HP drive array
with hotswap drives, and one old PC with a very strange looking card in it.
I'm going back tomorrow and pulling parts from the PCs that I didn't take.
They're all going to a steel scrapper so I'm free to take anything that I
want from them.
Joe
Hello, I found your e-mail when I was searching for wire recorders. I
thought perhaps you could help me. I am 85 years old and have some wire
tapes of my children and would love to convert them onto cassette or CD.
I live in Wsburg , Va.
Would you have any contacts of anyone who could help me? Thank you.
I have accumulated a couple of Panasonic HHC RL-H1400 "Hand Held Computer"s.
For a description, see:
http://members.cox.net/obsoletetechnology/Panasonic_HHC.html
Searching has indicated that a ROM "capsule" containing a version of MicroSoft
BASIC was available. Does anyone have one of these capsules, or a dump of a ROM
that can be written to a new ROM? The computers that I have came from insurance
agents and have insurance software on the ROMs that came with the computers.
The insurance ROMs are Motorola MCM 68764C and appear to be UVEPROMs.
Thank you,
Martin Marshall
