So I've just upgraded several BDV11's to Q22 (new EPROMs to handle more than
256KB of memory, adding termination for BDAL18-21, etc). If anyone has a BDV11
they want to update, let me know, and I can lend a hand, e.g. sending you new
EPROMs, lists of jumpers to change, etc.
Noel
> From: Josh Dersch
> I've been reading through the service manual on Bitsavers
> From: Paul Koning
> A schematic or manual might give a clue, if one can be found.
> From: Jon Elson
> Have you checked bitsavers for a manual?
!! :-)
Noel
TSIA. I'm in need of an owner's manual (and ideally, a service manual as
well would be nice) for a Northern Telecom Spectron D101. This is an RS232
serial datascope, basically a line monitor with some programmability
(displays in binary, hex, ascii, or octal; start tracking on certain
characters; substitute X string for Y string; etc.).
I've googled excessively with no results, and also reached out to AEK. Any
chance someone has one in their pile?
Best,
J
I'm gradually restoring a Mac SE/30. Today I got a new PRAM battery and
installed it. There was no battery leakage, so I'm good there. The
machine seems to run just fine. The big problem now is that even though
nothing should be emitted from the speaker, I'm getting zips, buzzes, and
burbles from it depending on what the computer is doing at the time. I'm
quite sure the the sound circuitry is somehow picking up RF noise from the
system bus. What does this symptom indicate? Should I recap the whole
machine?
--
David Griffith
dave at 661.org
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
By any chance does anyone have a line on the sets of metal drawers that
were used to store decks of punchcards? I know someone who's looking for
a bunch of them (ideally in/near New England, USA, but, whatever!).
Thanks,
John Wilson
The UC171 was a quantity one and is gone. Others are gone, but I still have
one or so left, plus a few goodies I'm just adding. Please contact me off
list. Any qty $10 shipping within US.
Paul
DILOG
DQ130
DQ686
Emulex
CS09
SC01
SC03
TU11
TU121
QD01
QD21
QD241
QT131
GTSC 304B DLV11-J?
SIGMA 400310
MATROX ELECTRONICS SYS QRGB-G/64
MATROX 80 QRGB-256
SPECTRA LOGIC 15/25
ABLE (ACT) 10067 LOOKS LIKE QUINEVERTOR
ABLE 10412 SAME
Please contact me off list if you are interested.
Thanks, Paul
That is a highly impressive autocoder implementation, and the article is an entertaining, yet deep and accurate technical overview of what makes the 1401 so special from a computer engineering point of view. One of the best short technical piece I've ever seen on the 1401. If the two machines work at the same time, I will certainly try to run it on one while making shorter demos on the second!
Marc
Sent from my iPad
> On Mar 24, 2015, at 10:00 AM, cctalk-request at classiccmp.org wrote:
>
> Re: Implementing the Mandelbrot set on an IBM 1401
I've been recovering old data from computers that I used many years ago,
the last effort was trying to recover the data from a hard disk that ran
a WFW 3.11 system. The problem was the disk could not be read on a
modern computer, so I recreated an old system and (very lucky for me)
ftp'd the data off the system after I found an ISA network card.
I have a couple of 4mm and 8mm tapes that contain data I want to
recover. The 4mm is DDS-1 and was written using tar on a SGI system in
1998. My questions are;
'What modern DAT tape drive will read this tape? How backward
compatible is this technology?'
This seems like an easy problem and intend to use a linux system to read
the tape.
The 8mm tapes were also written on an SGI system, however it was in 1994
and the IRIX Backup utility was used. IRIX 5 was probably used. Any ideas?
