1955: An Introduction to Automatic Computers (Ned Chapin <https://www.csueastbay.edu/oaa/files/docs/memorial/memorialchapin.pdf>)
I have the second edition ? copyright 1963. Chapter 8 is ?Elements of Programming? with a fully-worked out assembly language example for a hypothetical machine.
> Date: Sun, 20 Jun 2021 04:43:58 -0400
> From: "Paul Birkel" <pbirkel at gmail.com <mailto:pbirkel at gmail.com>>
>
> I know of two early computer (in the stored program sense) programming
> books.
>
> 1951: Preparation of Programs for an Electronic Digital Computer
> (Wilkes, Wheeler, & Gill)
>
> 1957: Digital Computer Programming (McCracken)
>
> What others were published prior to the McCracken text?
One of the original UCSD Pascal team contacted me, asking if
any of my Teraks are still working. Sadly, they don't.
I seem to remember hearing on the list that someone had re-capped and
re-socketed their Terak, and that it's working.
He wants to get video of an original, working Terak to demonstrate
the UCSD Pascal menu system. He wants to show how the UCSD Pascal
menu system could've influenced Apple's menus on the Lisa.
Yes, I pointed out that you can run it under emulation.
- John
Dear All,
Recently I received an IBM 2671 paper tape reader and have been slowly restoring it. However I've hit a bit of a brick wall because no service docs are known. If you are sitting on some please do let me know.
I am also looking for other bits of IBM mainframe/midrange stuff to restore so if anybody is looking to sell some, please PM me as well. I am in south England.
Thanks,
Al
hi all,
a friend of mine (Hartmut) is restoring desktop- and pocketcaluculators
as a hobby. Lately he got an HP9100B on his desk with a bad display tube (the
getters are white) but is otherwise in a good shape.
Is here possibly someone that has such an display Tube to sell?
Kind Regards from Germany,
Holm
--
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
Goethestrasse 15, 09569 Oederan, USt-Id: DE253710583
info at tsht.de Fax +49 37292 709779 Tel +49 37292 709778 Mobil: 0172 8790 741
Its been a while but Attachate software generally only needed special
hardware for stuff like 5250 twinax, 3270 co-ax, and various SDLC
connections.
This page might help check which versions support regis but they perhaps
don't go back to the really old versions...
https://support.microfocus.com/kb/doc.php?id=7021488
Dave
G4UGM
> -----Original Message-----
> From: cctech <cctech-bounces at classiccmp.org> On Behalf Of Wayne S via
> cctech
> Sent: 19 June 2021 00:50
> To: Douglas Taylor <dj.taylor4 at comcast.net>; General Discussion: On-Topic
> Posts <cctech at classiccmp.org>
> Subject: Re: VT340 Emulation
>
> We tried to use Reflection 240 on IBM PS/2 machines circa 1990. IIRC, it
> installed easily w/o needing special drivers.
> For the most part it worked as advertised. We didn't really need Regis
> graphics so we never tested that out. It's problem was that it was really
slow
> on PCs, much slower than a real VT240 terminal. We were trying to use
Dec's
> "all in one" office automation to do word processing and spreadsheets.
It's
> slowness caused us to abandon it and just use word perfect and lotus 123
> instead. FYI, There are reflection manuals on the wayback machine for
> reference.
>
>
> Wayne
>
>
> > On Jun 18, 2021, at 12:51 PM, Douglas Taylor via cctech
> <cctech at classiccmp.org> wrote:
> >
> > Right, according to the few notes I've seen on the packages currently
for
> sale on ebay.
> >
> > I hesitate to buy because I picked up a similar piece of software,
Smarterm
> 240, which seemed to do the desired emulation. It was old software for
DOS,
> but I have an old DOS machine I use for PUTR I thought I could install it
on and
> be up and running. It didn't turn out that way because Smarterm wanted a
> particular video card and driver (which I didn't have, of course). I
didn't find
> that out until I got the package open and tried installing it.
> >
> > I don't know if the Reflection software has any restrictions like that.
The
> versions I see for sale are for Win3.1 and such, not exactly the heyday of
plug
> and play. I was hoping to get some guidance from someone who has used
> the Reflection software on what the actual hardware/software requirements
> are.
> >
> > On a side note, emulating a Tektronix 4010 is apparently free and high
> quality (see github). It is the DEC graphics terminals that no one has
> produced an open source emulation software for, so that's why I am asking
> this question.
> > Doug
> >
> >> On 6/18/2021 1:16 PM, Bill Degnan wrote:
> >> Reflection 4 should do that, right?
> >> Bill
> >>
> >> On Fri, Jun 18, 2021 at 1:15 PM Douglas Taylor via cctech
> <cctech at classiccmp.org <mailto:cctech at classiccmp.org>> wrote:
> >>
> >> Does anyone have experience with the Reflection software that will
> >> emulate a DEC VT340 color graphics terminal?
> >
I am currently working on an IBM 5100 that has some issues. I know for
certain that the 5100 has a bad graphics controller card so I need to dig
into component level replacements for those ICs I can replace. I have a
list of logic chip equivalents to the IBM part numbers that are written on
the chips but I don't think it's 100% accurate because IBM part number
1582601 comes back as 74151 "DATA SEL/MUX" but when I use one of those
cheap logic chip testers (that is surprisingly accurate), it comes back as
a 74157. For the record, if I test a 74151, it comes back as a 74151 so the
tester is correct. I just want to make sure the table I have is accurate
and that the tester is not 100% accurate or if that chip has failed and
tests like a 74157 in it's state.
This is the current list I am using that I got from somewhere but I don't
recall where:
https://vintagecomputer.ca/ibm-vintage-logic-chip-equivalency-list/
Does anyone have an IBM logic chip equivalency table for 74 series logic
chips?
Any help is much appreciated.
Santo
> From: Tom Uban
> it has the early version M7261E Control Logic & Microprogram board and
> the later version M7260 Data Paths board
Ah, I'm glad someone found all that stuff I wrote up there useful. As always,
I _think_ I got it all transcribed correctly, but do be on the lookout for
errors!
> it seems like an older/newer combination, but maybe that was common. I
> would not have guessed that the four possible combinations would all
> work together, but maybe they do?
I honestly don't know. As far as I can tell, the DEC documentation doesn't
even _mention_ the two different board generations; perhaps a sign that they
are functionally interchangeable? (Although even the section on baud rate, in
both DEC-11-HKDBB-A-D and EK-KD11B-MM-001, 4.11, doesn't even mention the
early board. So maybe the manual just ignores the earlier version completely?)
I don't have an /05 up and running at the moment, or I'd check all 4 and see
if they all work.
> Presently, the machine sometimes runs relatively well and other times
> it does not.
What are the failure symptoms? (It's almost certainly going to take a 'scope
to fix it; I expect you have one?)
I'd start by monitoring the CPU clock, and make sure it's running when the
failure happens. (Note that the front console is handled by the microcode, so
if the microcode isn't running, the machine will be totally dead.
EK-KD11B-MM-001 has a good description of how that works.)
> my initial messing with KM11 boards, reveals that I can step the
> microcode with a KM11 in either the #1 or #2 position, but when two
> KM11s are installed at the same time, they do not function properly
> together. Is this expected or do I have an issue there too?
Not sure. EK-KD11B-MM-001 (available at:
http://www.bitsavers.org/pdf/dec/pdp11/1105/EK-KD11B-MM-001_Jan75.pdf
and definitely something you need) says, at pg. 5-6 "KM11 switches have the
same function in slots KM-1 and KM-2", and on 5-7 "permits the user who has
only one KM11 to plug into either KM-1 or KM-2".
So that _sounds_ like you should be able to plug two in together. The first
indicates that the switches, the only input to the KD11-B from the KM11, are
wired in parallel, and the only other thing on the KM11 are the lights,
outputs. And why mention "user who has only one KM11", if having two is no
use because one can't use two at once?
Noel
> I'm moving and I need to clean out a few things.
>
> I have a Sun 3/60 with no keyboard/mount/monitor/hard drive - just the
> pizza box. It net booted NetBSD, but that was many years ago so YRMV.
>
> Free for pick-up only in Queen Creek, AZ.
Is this still available? This is the kind of hardware I'd like to help
preserve.
Thanks,
John Klos
