Well, I just acquired some VT100's, albiet without keyboards. So, now I'm looking for some VT100 keyboards - even broken or damaged ones.
Also, I _just_ missed a Zenith Z29 terminal (newer than the Z19, with detachable keyboard), on eBay, simply because I forgot to bid before I left the house. Augh! So, I'm looking for one of those too - does anyone have one that is looking for a home?
Also, while I'm looking for stuff, anyone have a Qbus Pertec tape drive controller that'll work in a Vax?
I've more of these than anyone will need and they're all brand new.
3 packs of Bernoulli 5.25 44meg disks
KAO 5.25 88meg syquest disks. The label inside says they are formatted for
Macs but includes software for wintel machines also.
$1 each plus whatever for shipping and they're yours. Just say how many you
I am not willing to give up my privacy for the false promise of 'security'
I'm sure most everyone who has ever used a C64 is aware of just how
phenomenally bad the Commodore power supply is. I have only one C64,
but both of my spare Commodore power supplies have now failed, taking
a few 4164 RAM chips with them (thankfully, I have replacements!).
Does anyone know of a commercially available replacement power supply,
before I go off and build one? A linear supply would be trivial to
design, but I've never done a switching power supply, which I suppose
would be greatly preferable. The trick with the C64 is that it
requires both 9V AC and +5V DC. (I've considered frankensteining
together 9V AC and +5V DC wall-wart adapters onto the same DIN-7
cable, but it just feels so very very wrong).
I'd love to hear from other Commie fans who've solved the power problem.
Is there any way to connect 13W3 output of GXP550P (graphics card
in RS/6000 p43) to 13W3 SGI monitor (GDM-20E21)? In order to connect
SPARCstation I had to make a little modification of the SS2 to make
it generate sync-on-green signal. Will the same modification work
If you cut off my head, what would I say? Me and my head, or me and my body?
Just a reminder that next weekend is my 4th annual Vintage Computer
Festival/Midwest, held at Purdue University's Stewart Center. The
event has speakers from 11am until 1pm each day, and the exhibits are
open from 1pm until 5pm. The ticket price is $5 per day, or free if
you're 17 or under, or have a valid Purdue student ID.
The event is a celebration of the history of computing, and the machine
and people that got us to where we are today. There will be lots of
neat technology, and this year we have a door prize of an IBM PCjr from
1983! The PCjr was IBM's first attempt at an inexpensive home
I've got several exhibitors signed up, but still have room for more; if
you want to show up to show off your collection, or have a few things
to sell off at the consignment sale, sign up to be an exhibitor at
http://vintage.org/2008/midwest/, or send me an email at this address.
Exhibitors get one free t-shirt and free admission, which is included
in the $10 per table fee.
Purdue University Research Computing --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
I'm looking at buying a Willem programmer to go with my Data I/O 29B.
Mostly I'll be using it for reading existing ROMs and programming
stuff bigger than the 29B can handle.
I've been looking at willem.org, on eBay, and at a couple of non-eBay
sources. The first most obvious problem is that none of the available
variants exactly match the willem.org board revisions, and I haven't
found any cross-reference information.
I'm probably not going for the new "true-USB" board. Any system I'll
run it with has parallel ports.
1) I know a few folks on the list have willem boards. What board
version do you have, where did you get it (if you remember), and are
there any major pros and cons?
2) Does anybody here have experience with Kee Electronics?
I'd rather buy direct than off eBay, and they look like a good
3) Yes, I know the software's Windows-only. If anybody knows of a
sub-$100 programmer with OS X software, I'd be overjoyed to hear about
it. Otherwise, BFD; I have to keep a Windows box for work anyhow.
Any input is greatly appreciated.
Zane, I'm still getting a 554 reject from citrine.aracnet.com
I'm currently looking at the HP50962 SRM Coax interface PCB. This is a
(custom) netowork card for HP9000/200 copmputers.
I can't indentify one the the ICs, which basically links to the Coax
netowrk cable. It's made by AMD (big AMD logo on it), and carries the HP
house number 1826-1388, which I can't find anywhere.
It's a 24 pin ceramic DIL package, and I've identified some of the pins
1 - to ground trhough a resistor (maybe soemthing like Rx gain set)
3 - ground
4,5 - to a pulse transformer, the other side of which goes to the coax
connector. Rx inout?
6,7 - ground
8 - Clock input
11 - Rx Clock output
13 - Rx Data output
15 - Tx Clock (output??)
17 - Tx Enable/
18 - Tx Data
19,20,21 - +5V
22,23 - To 4,5 via low-value resistors (and thus to the pulse
transformer). Tx Out?
Looking down lists of ICs, I wonder if it's related to the AM7960 or
AM7961, but I can't find data on those anywhere.
1) Does anyone have the data sheets on those ICs on-line anywhere? (As
ever, please don't send pdfs or other large files to me here, but if you
have said data sheet as a pdf, I can tell you how to get it to me).
2) Any other ideas as to what that chip might be.
Thanks in advance
I picked up an HP7260A table top card reader, with the aim of
restoring it to working condition. The major problem has been that
the "pick" roller that moves the card out of the input hopper and
through the first gate had melted into a pile of goo, ending up in a
puddle in the output hopper. I only had to sacrifice four blank cards
(hand fed) before getting one to pass thru the rest of the transport
almost entirely unblemished(*). So far the control/sequencing
circuitry seems to be working, but I haven't checked yet if any data
is comming out the serial port.
Thanks to the HP Computer Museum (www.hpmuseum.org), I found the
maintenace manual, and an image of what the roller looked like (#48 in
the image below):
I used one of these readers when I was in High School c. 1978. Before
finding the maintenance manual I had no memory of what the roller
looked like, but it must have been something soft, with a lot of
gripping power. Any suggestions (short of attempting to cast a
replacemnt out of melted gumi candy)? The axle is a quarter inch or
close, and roller needs to be at least a quarter inch thick.
I'm tempted to drop in on a local rubber products company (Greene
Rubber, in Woburn Ma), but knowing what to ask for would help!
Thanks in advance for any suggestions.
(*) One pinch roller inside was slightly gooey, and still gives off
blackness, no matter how many times I clean it. The pinch rollers all
have a flat spot from having sat for many years, and I might try to
replace them with O-rings, but it's not the top priority.