> On Jul 30, 2025, at 3:07 PM, Martin Bishop
> wrote:
>
> https://www.eenewseurope.com/en/raspberry-pi-spins-its-rp2350-adds-5v-support/
> was my point of departure, doubtless a recycled press release.
Yikes. Assuming that is accurate, Raspberry Pi screwed up very severely by
claiming 5V
qualification, or if it really is a revision dependent feature that isn't
correctly documented as such?
paul
>
> FWIW my low tech TTL --> LVTTL input interface design is a 3v0 Zenner clamp
>
> Martin
>
> -Original Message-
> From: Paul Koning via cct
combo pins, so for any 5 volt
work you'd have to avoid directly connecting 5 volt devices.
paul
> On Jul 30, 2025, at 12:30 PM, Paul Koning via cctalk
> wrote:
>
> That's interesting. I have been using the RP2350 for a while now but I
> missed that detail.
That's interesting. I have been using the RP2350 for a while now but I missed
that detail.
For what I do, I've found that just a voltage divider works fine for 3 volt
tolerant inputs with 5 volt drive. And 5 volt TTL seems to be happy with the 3
volt logic high that the Pico chips produce. S
> On Jul 25, 2025, at 1:13 PM, cz via cctalk wrote:
>
> Oh is this public now? I remember this, it was hilarious. Imagine what
> happens when all your valves go to "open" or "closed" at once
It reminds me a bit of the opening scene of Red Storm Rising -- Tom Clancy's
second novel though
> On Jul 17, 2025, at 12:55 PM, Carlos E Murillo-Sanchez via cctalk
> wrote:
>
> Paul Koning via cctalk wrote:
>>> I wonder about "they were certain it would not work". That should be a
>>> question of fact, not belief.
> -snip-
>> For po
> On Jul 17, 2025, at 10:41 AM, Jon Elson via cctalk
> wrote:
>
> On 7/17/25 08:45, Paul Koning via cctalk wrote:
>>
>>> On Jul 16, 2025, at 3:42 PM, Van Snyder via cctalk
>>> wrote:
>>>
>>>> ...
>>> The Computer Histor
> On Jul 16, 2025, at 3:42 PM, Van Snyder via cctalk
> wrote:
>
>> ...
>
> The Computer History Museum in Sunnyvale, CA has a working IBM 1401
> computer from Germany. It has ferroresonant power supplies. They bought
> a converter to supply 50 Hz power because they were certain it wouldn't
>
> On Jul 16, 2025, at 11:42 AM, Will Cooke via cctalk
> wrote:
>
>
>
>> On 07/16/2025 11:10 AM EDT Tony Duell via cctalk
>> wrote:
>>
>>
>> On Wed, Jul 16, 2025 at 4:00 PM Jon Elson via cctalk
>> wrote:
>>>
>>> What I might do is make up a cap bank that is 1.2 X larger
>>> than the 2
> On Jul 7, 2025, at 7:45 PM, Marvin Johnston via cctalk
> wrote:
>
> While not on a 780 back plane, about 50 years ago, I was basically in charge
> of some 26 PDP16M computers. Periodically, one of the chips would be found
> with the top blown off. At some point, I pulled the computer and
> On Jul 6, 2025, at 7:08 PM, Brendan McNeill via cctalk
> wrote:
>
> I’m loving these stories, those of us who were field engineers have many to
> share.
>
> I started out as an FE with CDC in the 1970’s here in New Zealand and then
> moved to Data General five years later. CDC was a ver
> On Jul 5, 2025, at 10:14 PM, Gavin Scott via cctalk
> wrote:
>
> On Sat, Jul 5, 2025 at 2:40 PM Paul Koning via cctalk
> wrote:
>> I assume those were all done by hand; it's not obvious how a robot could do
>> that in the early 1960s, unlike wire wrap b
> On Jul 5, 2025, at 8:55 PM, ben via cctalk wrote:
>
> On 2025-07-05 1:34 p.m., Paul Koning via cctalk wrote:
>>> ...
>> Compared to CDC 6000 mainframes, the 780 (and other DEC computers) are
>> marvels of simplicity. Consider the 6600: 15 chassis each with
> On Jul 5, 2025, at 11:05 AM, Jon Elson via cctalk
> wrote:
>
> On 7/4/25 14:32, Mark Kahrs via cctalk wrote:
>> Jon Elson's take hits home. A 780 was delivered and VMS was running. We
>> installed 4.1BSD and it ran fine until it crashed. Field service insisted
>> we needed a full set of
Side tracking slightly from the "VAX 86x0 schematics" discussion into changing
field service procedures over the years: I remember some fairly hairy cases in
the 1970, when FS engineers had to be way more capable than board swappers.
1. DEC RS64 fixed head disk was behaving badly, making more no
> On Jul 3, 2025, at 2:26 PM, Wayne S via cctalk wrote:
>
> That’s a good business practice anyway. You want your high price system up
> and running as fast as possible, so not having to do more than cursory
> diagnostics is a good thing I think deck realize that with the VAX and it’s
> rem
> On Jul 3, 2025, at 2:00 PM, cz via cctalk wrote:
>
>> Same here. The FE came prepared with a replacement board. Never repaired the
>> board.
>> In and out!
>
> Which makes sense. My guess is in the 80's 90's they would send the board
> back to a rework facility and repair it there. BGA/PG
> On Jul 2, 2025, at 8:48 PM, Jon Elson via cctalk
> wrote:
>
> On 7/2/25 11:25, Paul Koning via cctalk wrote:
>>
>>> On Jul 2, 2025, at 11:13 AM, Jon Elson via cctalk
>>> wrote:
>>>
>>> On 7/2/25 06:08, P Gebhardt via cctalk wrote:
> On Jul 2, 2025, at 11:13 AM, Jon Elson via cctalk
> wrote:
>
> On 7/2/25 06:08, P Gebhardt via cctalk wrote:
>> Dear list members,
>>
>> I was wondering if anybody is aware of VAX 86x0 schematics having survived
>> the product life cycle within DEC? I searched the web extensively but coul
> On Jul 2, 2025, at 7:28 AM, Antonio Carlini via cctalk
> wrote:
>
> I have the VAX 8600 Training Print Set and I sent it to someone (sorry,
> forgot who) years ago.
>
> There's at least one online version here:
> https://www.vaxhaven.com/images/0/04/EY-4818E-PP-0001.pdf
>
> I don't know
gt;> some invites to some classic computer discords where people will really
>>>> want your boards to complete their systems.
>>>>
>>>> Wayne
>>>> Sent from my iPhone
>>>>
>>>>> On Jun 29, 2025, at 11:04, Paul Koning via cctal
> On Jun 29, 2025, at 5:05 AM, Paul Anderson via cctalk
> wrote:
>
> Front panels: I have both 8-A, KY11-LA and -LB for 11/04, /34, one each
> 11/70 RDC remote diag con, corporate (blue/blue), and regular. I think
> there is an 11/40 with a 11/35 silkscreen. I have to go through the 8-E, F,
>
> On Jun 22, 2025, at 5:00 PM, Anders Nelson via cctalk
> wrote:
>
> I would love to see someone create a galvo-laser system for punching
> paper/mylar tape. On Aliexpress you can get a galvo set for (all prices
> USD) ~$30, a 10W laser head for $40, ..
What is a "galvo-laser"? A lot of Al
I'm always puzzled by "local only" offers. It's expected that shipping costs
get added, but why would a seller make a decision that shipping is "too
expensive"? Logically the buyer should decide that, and if the buyer will pay
the shipping, even if pricy, why not do the transaction?
p
Drawing on a computer screen goes back at least a decade from that (PLATO had
it back then) if not more.
paul
> On Jun 9, 2025, at 7:35 PM, Murray McCullough via cctalk
> wrote:
>
> Bill Atkinson, a true early microcomputer pioneer, ca. 1984+, brought
> drawing on a computer screen an
> On Jun 6, 2025, at 9:14 AM, donald donaldwhittemore.com via cctalk
> wrote:
>
> Any fluid you need is probably banned by local, state or federal government.
> :)
Yes, I remember when we had a bottle of benzene sitting around when I was a kid
-- it did a great job removing sticky residue
> On Jun 6, 2025, at 9:07 AM, Tony Duell via cctalk
> wrote:
>
> On Fri, Jun 6, 2025 at 1:58 PM Mike Stein wrote:
>>
>> Any tips on cleaning it up?
>
> Wear old clothes :-)
>
> Take everything apart that will sensibly come apart. Including
> anything located below the old rubber parts, th
> On May 16, 2025, at 10:38 PM, Henry Bent via cctalk
> wrote:
>
>> ...VAX eln realtime applications?
>>
>> Warner
>
> Yeah, I always forget that that existed. I kind of get the sense that
> everyone else did too. Did it get any real market penetration?
>
> -Henry
One VAXeln application is
That's the machine that ran the Senster "cybernetic sculpture" at the Evoluon
in Eindhoven, right? That has been restored but apparently not with the
original software. I have been wondering if that code could be run on a
simulator and get it to work right. The listings still exist, as do at
> On May 13, 2025, at 9:52 AM, Christian Liendo via cctalk
> wrote:
>
> Back in Nov of 2023 Ed Sharpe asked the following: “Was there ever a
> COMPUTER using a 4004 that you could really do something or did that
> finally arrive with the 8008”
> https://classiccmp.org/mailman3/hyperkitty/list
> On May 9, 2025, at 10:36 AM, Jonathan Chapman via cctalk
> wrote:
>
>> If you get non-oiled paper I don’t know if there would
>> be additional occasional mechanism maintenance needed. I guess take what
>> you can get.
>
> Not only will there be more stoppages, you'll wear out the punch pin
> On May 8, 2025, at 6:15 PM, Steve Lewis via cctalk
> wrote:
>
> Makes sense, IPL (instruction program load?)
"Initial Program Load"
> - how were the disk packs
> initialized to indicate it was an IPL media? I assume the content to be
> loaded had to be on a specific sector or of a file-t
> On May 4, 2025, at 5:51 PM, Will Cooke via cctalk
> wrote:
>
> From all I have seen, Maurice Wilkes is considered the inventor of
> "microcode" as we know it. In the linked paper from 1951 he uses the term
> "micro-programme", so I think it is safe to say microcode was used in the
> sam
> On May 4, 2025, at 9:43 PM, Ethan Dicks via cctalk
> wrote:
>
> On Sun, May 4, 2025 at 8:03 PM Bill Gunshannon via cctalk
> wrote:
>> If you have a free serial port there is always an old GPS receiver
>> like A Delorme Tripmate. They show up on eBay all the time.
>
> Sure. We used to us
> On May 4, 2025, at 4:05 PM, Steve Lewis via cctalk
> wrote:
>
> The IBM5100 also uses the term "microcode" - but I'm not sure if that term
> pre-1975 means the same as what, say, Intel used it for around the x86?
> I've seen a glimpse into the syntax of the x86 microcode. In the IBM
> 5
> On May 4, 2025, at 3:06 PM, Johan Helsingius via cctalk
> wrote:
>
> On 04/05/2025 20:39, Paul Koning via cctalk wrote:
>
>> A language for which specific machines have been built a number of times is
>> FORTH
>
> Another is Lisp.
Good point. A
> On May 4, 2025, at 2:24 PM, ben via cctalk wrote:
>
> On 2025-05-04 2:11 a.m., jos via cctalk wrote:
>>> I recall that system had many boards, the whole "CPU" box was external to
>>> the monitor (and in the earliest versions, the power supply was also a
>>> large external box). I can't rea
> On May 4, 2025, at 1:36 PM, Steve Lewis via cctalk
> wrote:
>
> I get that, that a general purpose processor with a particular instruction
> set can be made up from TTLs (or vacuum tubes, or water sleuths, or metal
> gears, etc), and am familiar with the Datapoint (and it always was odd to
Does RSX have the equivalent of the FORTRAN-IV compiler on RT11? That one is a
more basic implementation, lower performance but I think also smaller code. It
doesn't need an FPP.
paul
> On Apr 24, 2025, at 2:01 PM, Peter Ekstrom via cctalk
> wrote:
>
> Well darn! I forgot I don't h
> On Apr 20, 2025, at 1:55 PM, Chuck Guzis via cctalk
> wrote:
>
> On 4/20/25 09:18, Martin Bishop via cctalk wrote:
>> Why 5 mA current loop ?
>
> If one asks "why current loop?", the answer is obvious. Superb induced
> noise immunity I think, is the big one. If you're a musician on stag
Indeed. Olivetti Programma, wow. I read about that one when I was in high
school, but never saw one.
On the old style networking: those Smartbit boxes ring a bell, and the 3Com
stuff is familiar. If you want to do old style networking, it would be great
to try for coax (thick or thin).
> On Apr 15, 2025, at 11:45 AM, Christian Gauger-Cosgrove via cctalk
> wrote:
>
> ...
> • VAXset/DECset — specifically the Language Sensitive Editor
Every time I see that product name I mistake it for one that was in development
around 1980, a typesetting system running on VMS. I thought i
Works fine here, and I haven't seen any gaps in operation. I see traffic
regularly, perhaps not quite daily but close.
paul
> On Apr 15, 2025, at 9:51 AM, Tom Hunter via cctalk
> wrote:
>
> I have received no messages for a while. Is the list down?
> Thanks
> Tom
> On Apr 7, 2025, at 4:05 PM, Fred Cisin via cctalk
> wrote:
>
> On Mon, 7 Apr 2025, Dennis Boone via cctalk wrote:
>> > > Can you post a picture of what you can see?
>> > Can't post photos here,
>> Tony and I assembled a page of photos, which can be found here:
>> https://yagi.h-net.org/phili
> On Apr 8, 2025, at 10:26 PM, The Doctor via cctalk
> wrote:
>
>
> On Monday, April 7th, 2025 at 13:05, Fred Cisin via cctalk
> wrote:
>
>> although time consuming, and requiring som moderate machining skill, that
>> looks like it shouldn't be an extreme problem to make a blank.
>> I ass
> On Apr 8, 2025, at 12:06 PM, Tony Duell via cctalk
> wrote:
>
> ...
> I think there is only one key. The lock is somewhat unsual though.
>
> There are 4 pins in the plug (the rotating part). There are 3
> positions of the lock and the key is removeable in all 3. There are
> therefore 3 set
> On Apr 7, 2025, at 2:34 PM, Dennis Boone via cctalk
> wrote:
>
>>> Can you post a picture of what you can see?
>
>> Can't post photos here,
>
> Tony and I assembled a page of photos, which can be found here:
>
> https://yagi.h-net.org/philips_p3800_lock/
It looks like a Lips lock, which
> On Mar 29, 2025, at 4:06 PM, Milo Velimirović via cctalk
> wrote:
>
> ...
> The ability to use larger printed circuit boards; it gets you higher density
> and avoids the need to run (as many) interconnects off the board and thru the
> backplane. Remember that 50-60 years ago was the era o
> On Mar 14, 2025, at 3:30 PM, ben via cctalk wrote:
>
> The Electrologica X1, had the upper block of core memory as ROM for
> fixed system programs use. I am doing the same for my computer.
>
> Did any other computers have the same concept before the 1977?
> Ben.
Definitely. I think the X1
> On Mar 14, 2025, at 4:14 AM, Martin Bishop
> wrote:
>
> Paul
>
> Prompted by your mention of this thesis a month ago - I went in search
>
> The entire thesis appears to be available in pdf
>
> https://www.cwi.nl/en/news/new-insights-from-reconstructing-the-first-algol-60-system/
>
> ht
> On Mar 13, 2025, at 7:56 PM, Paul Koning via cctalk
> wrote:
>
>
>
>> On Mar 13, 2025, at 4:35 PM, ben via cctalk wrote:
>>
>> On 2025-03-13 1:36 p.m., Paul Koning via cctalk wrote:
>>
>>> Depends on which one. RTL was 3.6 volts posi
> On Mar 13, 2025, at 4:35 PM, ben via cctalk wrote:
>
> On 2025-03-13 1:36 p.m., Paul Koning via cctalk wrote:
>
>> Depends on which one. RTL was 3.6 volts positive, as far as I can remember.
>> I actually have a keyboard that has some of those devices in it.
> On Mar 13, 2025, at 3:28 PM, ben via cctalk wrote:
>
> On 2025-03-13 12:24 p.m., Martin Bishop via cctalk wrote:
>> One FPGA will easily do a VLIW sequencer + scalar mills (one or more, memory
>> / MAC assemblies) or a simple processor
>
> When it works.
> I see lots low cost Chinese FPGA
> On Mar 13, 2025, at 7:36 AM, Holm Tiffe via cctalk
> wrote:
>
> ...
> Ok, this is a full fledged mainframe CPU.. not really what I want todo first.
> That stuff tends to "explode" in sight of parts, needed power and space,
> I know that.
> On the other side I saw different controllers for P
> On Mar 12, 2025, at 2:39 PM, Christian Gauger-Cosgrove via cctalk
> wrote:
>
> Hello all,
>
> I'm curious, does anyone have any documentation on the CP11 card punch
> option? From the '91 Edited Option Module List and various iterations
> of the "Field Guide to QBUS and UNIBUS Modules" tha
A typical use for those would be either to delay applying plate voltage to a
high power amplifier tube until after the filament current has been on for a
bit, or to cut out a series resistor used to limit the inrush current on a
capacitor-input power supply. The delay (especially the 5 seconds)
> On Feb 21, 2025, at 4:09 PM, Wayne S wrote:
>
> That’s a side channel attack.
> If there ever was one.
> Was there ever a proof of concept made of that theory ?
Oh yes. The paper describes implementing and executing the attack; it isn't a
theoretical work. It also gives a demonstration
> On Feb 21, 2025, at 2:28 PM, ben via cctalk wrote:
>
> On 2025-02-21 11:55 a.m., John via cctalk wrote:
>> On Fri, 21 Feb 2025 12:00:07 -0600
>> Paul Koning wrote:
>>>> What is the problem with ISRs running in a user stack? The ISR
>>>> runs, ex
> On Feb 20, 2025, at 5:04 PM, Mike Katz via cctalk
> wrote:
>
> The advantage of multiple stacks is that the system stack runs ring 0
> protected tasks (main operating system tasks). The user stack runs the
> user(s) tasks.
>
> On systems with some kind of memory protection this keeps an
> On Feb 20, 2025, at 1:52 PM, paul.kimpel--- via cctalk
> wrote:
>
> What is the problem with ISRs running in a user stack? The ISR runs, exits,
> the stack is cut back, and net effect on the user's stack is zero.
A stack access fault in user mode kills the process, in kernel mode (certain
> On Feb 19, 2025, at 4:08 PM, Gary Grebus via cctalk
> wrote:
>
> On 2/17/25 12:30, Chuck Guzis via cctalk wrote:
>
>> One of most ingenious coding tricks to me was the problem of saving and
>> restoring all registers without resorting to an exchange jump. We used
>> that one as a test for
> On Feb 19, 2025, at 11:44 AM, Chuck Guzis via cctalk
> wrote:
>
> Don't know if it was mentioned, but the NS16032 (later renamed to
> NS32016) employed two stack pointers (SP0 and SP1), but the
> implmentation was one for user stack and the other for interrupts.
> Which only made sense--you
> On Feb 17, 2025, at 7:32 PM, Will Cooke via cctalk
> wrote:
>
>
>> On 02/17/2025 3:52 PM EST Paul Koning via cctalk
>> wrote:
>
>>
>> Indeed. There's a wonderful photo of them by Ansel Adams. Look for it; it
>> shows the two o
> On Feb 17, 2025, at 3:08 PM, Van Snyder wrote:
>
> On Mon, 2025-02-17 at 09:13 -0500, Paul Koning wrote:
>>
>>>
>>> When Tom Pennello was a grad student studying under Frank de Remer at
>>> ACSC, he collected a big pile of codes in languages that
> On Feb 17, 2025, at 2:58 PM, Van Snyder wrote:
>
> On Mon, 2025-02-17 at 08:53 -0500, Paul Koning wrote:
>>
>>
>>
>>
>>> On Feb 16, 2025, at 7:38 PM, Van Snyder via cctalk
>>> wrote:
>>>
>>> It also
&g
> On Feb 17, 2025, at 12:30 PM, Chuck Guzis wrote:
>
> On 2/17/25 06:17, Paul Koning wrote:
>
>> Also multiple functional units, seriously interleaved memory, and a bucket
>> full of other tricks. The way loads and stores are requested by the
>> programmer n
> On Feb 17, 2025, at 12:04 PM, ben via cctalk wrote:
>
> On 2025-02-17 7:26 a.m., Paul Koning via cctalk wrote:
>
> ...
>> The problem was fixed fairly well with the introduction of the DEC
>> Multinational Character Set, which later morphed into ISO Latin-1 (wit
> On Feb 17, 2025, at 10:36 AM, Peter Corlett via cctalk
> wrote:
>
> On Mon, Feb 17, 2025 at 09:11:17AM -0500, Paul Koning via cctalk wrote:
> [...]
>> int f1(int i) {
>> int j;
>> int f2(int x) { int y; y = j*2; ... f1(x+1); }
>> f2(...);
>&g
> On Feb 17, 2025, at 7:45 AM, Frank Leonhardt via cctalk
> wrote:
>
> On 16/02/2025 21:21, David Wade via cctalk wrote:
>> On 16/02/2025 20:51, paul.kimpel--- via cctalk wrote:
>>> I don't understand -- ASCII had only two versions, 1963 and 1967, and both
>>> had square brackets. The IBM PC
> On Feb 17, 2025, at 9:02 AM, Frank Leonhardt via cctalk
> wrote:
>
> On 17/02/2025 05:12, ben via cctalk wrote:
>> Did any classic computers have a subroutine call as (S++)=PC, PC=(EFA)
>> as well as the standard call (--S)=PC,PC=(EFA) ?
>> One could have a virtual stack machine, using hel
> On Feb 16, 2025, at 10:39 PM, Chuck Guzis via cctalk
> wrote:
>
> On 2/16/25 15:52, Paul Koning via cctalk wrote:
>>
>>
>>> On Feb 16, 2025, at 5:30 PM, paul.kimpel--- via cctalk
>>> wrote:
>>>
>>> The question concerned g
> On Feb 16, 2025, at 8:03 PM, Van Snyder via cctalk
> wrote:
>
> On Sun, 2025-02-16 at 18:52 -0500, Paul Koning via cctalk wrote:
>> For example, the EL-X8 has an addressing mode for resolving
>> references through the "display" of static scopes in wha
> On Feb 16, 2025, at 8:00 PM, ben via cctalk wrote:
>
> ...
> I have trouble understanding the fine points of accessing a local variable in
> Algol with a display. Books tend to spend more time
> on the evils of a dangling else, and gloss over the run time action of
> a display.
Displays ar
> On Feb 16, 2025, at 7:38 PM, Van Snyder via cctalk
> wrote:
>
> It also
> had a thermal printer called "teledotis." It was very fast, so some
> called it the Whippet. It electrostatically deposited soot onto special
> paper, which was then fused by a heat roller.
I would call that an
> On Feb 17, 2025, at 12:12 AM, ben via cctalk wrote:
>
> Did any classic computers have a subroutine call as (S++)=PC, PC=(EFA)
> as well as the standard call (--S)=PC,PC=(EFA) ?
> One could have a virtual stack machine, using helper functions without
> having to deal with return addresses
> On Feb 16, 2025, at 5:30 PM, paul.kimpel--- via cctalk
> wrote:
>
> The question concerned good ALGOL code generation, not the feasibility of
> ALGOL code generation.
I know that, but just as RISC machines can run very fast no matter what
applications you feed them, compilers created wit
> On Feb 16, 2025, at 4:06 PM, paul.kimpel--- via cctalk
> wrote:
>
> The thing you really need for good ALGOL code generation is a target
> architecture designed to support it. All of the early implementations I know
> about that attempted full support of ALGOL-60 targeted a virtual machin
> On Feb 16, 2025, at 2:54 PM, Van Snyder via cctalk
> wrote:
>
> On Sun, 2025-02-16 at 09:32 -0500, Paul Koning via cctalk wrote:
>> A lot of early "ALGOL" compilers did major subsetting because it was
>> considered to hard to do the real language.
>
> On Feb 16, 2025, at 1:45 PM, Cameron Kaiser via cctalk
> wrote:
>
>
>> You're right that "original research" doesn't go into Wikipedia. But "major
>> mainstream outlet" is not required. For example, the Electrologica X1
>> article cites sources for its content, most of which are rather
. Unless your
> article was published by some major mainstream outlet, you're toast, even if
> you are literally the last person on Earth who knows the stuff.
>
> From: Paul Koning via cctalk
> Sent: Sunday, February 16, 2025 10:08 AM
> To: cctalk@classiccmp.org
> C
> On Feb 16, 2025, at 11:56 AM, ben via cctalk wrote:
>
> On 2025-02-16 7:32 a.m., Paul Koning via cctalk wrote:
>
>> A lot of early "ALGOL" compilers did major subsetting because it was
>> considered to hard to do the real language. Those subsets
> On Feb 15, 2025, at 11:24 PM, Steve Lewis via cctalk
> wrote:
>
> I'm not very familiar with ALGOL, but just today I met someone at VCF who
> has essentially built a replica of the LGP-30 (in FPGA form, more on that
> to come down the road, but it is a system from 1955/1956). Then related
> On Feb 16, 2025, at 9:46 AM, Frank Leonhardt via cctalk
> wrote:
>
> On 16/02/2025 04:24, Steve Lewis via cctalk wrote:
>> I'm not very familiar with ALGOL, but just today I met someone at VCF who
>> has essentially built a replica of the LGP-30 (in FPGA form, more on that
>> to come down t
> On Feb 15, 2025, at 3:34 PM, Wayne S via cctalk wrote:
>
> 6 bit characters were used by CDC 24 bit machines. 4 chars per 24 bit word.
Lots of companies created 6 bit character sets, all different.
For extra fun take a look at 6-bit (punched tape) codes used for typesetting
machines. Th
> On Feb 15, 2025, at 2:53 PM, ben via cctalk wrote:
>
> On 2025-02-15 11:27 a.m., Frank Leonhardt via cctalk wrote:
>
>> Running anything like Algol on a machine with drum memory seems a bit
>> optimistic!
>
> Remove "Like Algol" and the statement is even more valid.
Oh? Certainly by tod
> On Feb 15, 2025, at 4:10 AM, Bill Duncan via cctalk
> wrote:
>
> On Mon, Feb 03, 2025 at 06:09:28AM +, Chuck Guzis via cctalk wrote:
>> On 2/2/25 17:22, Will Cooke via cctalk wrote:
>>>
>>>
>>> Not quite lost. The 1802 crowd is doing amazing things.
>>> See https://groups.io/g/cosmac
> On Feb 13, 2025, at 6:54 PM, Henry Bent via cctalk
> wrote:
>
> On Thu, 13 Feb 2025 at 18:44, Rick Bensene via cctalk
> wrote:
>
>>
>> There was a company called Xircom that made parallel port modems. These
>> were full modems that were small enough that they plugged into a laptop
>> ser
> On Feb 13, 2025, at 1:41 PM, Nigel Johnson Ham via cctalk
> wrote:
>
> On 2025-02-13 12:11, Michael Thompson via cctalk wrote:
>> Try Gentry, Megan or"m...@verizon.net" <
>> m...@verizon.net>
>>
>> On Thu, Feb 13, 2025 at 8:37 AM Hans-Ulrich Hölscher via cctalk <
>> cctalk@classiccmp.org>
> On Feb 10, 2025, at 11:46 AM, Jim Brain wrote:
>
> On 2/10/2025 10:08 AM, Paul Koning wrote:
>> ...
>> The difference is that the 202 standard was designed to run half duplex over
>> a standard phone line, or full duplex if you had a 4 wire (leased line)
>
> On Feb 10, 2025, at 3:58 AM, Jim Brain via cctalk
> wrote:
>
> On 2/10/2025 1:14 AM, Steve Lewis via cctalk wrote:
>> If I'm understanding it right, a "sort of" answer to my own question is:
>> 2400 baud (v.22bis) was an "amplification" (not the right word, but "phase
>> magic") of 600 baud
> On Feb 9, 2025, at 1:08 PM, Steve Lewis via cctalk
> wrote:
>
> I was about to ask if anyone ever built a "Parallel Modem" - but I searched
> around first, and lo and behold, Microcom did ! (v.fast / v.34 era, c.
> 1996)
I don't know what "parallel modem" would mean. Can you explain?
>
> On Feb 3, 2025, at 5:32 PM, Sean Conner via cctalk
> wrote:
>
> It was thus said that the Great ben via cctalk once stated:
>>>
>>> At the root of Open Source is you, the user, have the right to the
>> source code.
>>>
>>> In the early days, that's as far as it went but especially after t
> On Feb 3, 2025, at 4:08 PM, Chuck Guzis via cctalk
> wrote:
>
> On 2/3/25 12:51, Wayne S via cctalk wrote:
>> If safety is of paramount importance, a supplied object or executable should
>> never be used. That’s just common sense.
>>
>> Sent from my iPhone
>
> Seems to be a cognitive di
> On Feb 3, 2025, at 3:40 PM, Alexander Schreiber via cctalk
> wrote:
>
> ...
> On top of that: A lot of those LLMs are build on theft at an epically large
> scale. They hovered up everything in sight (and then some) without even
> pretending to care about intellectual property rights - e.g.
> On Feb 3, 2025, at 3:42 PM, Donald Whittemore via cctalk
> wrote:
>
> I was not being specific on language or the app. I was questioning the
> general impression that open source is safe(r). If I am not proficient in the
> source language or have the ability to create my own executable I
> On Feb 3, 2025, at 2:08 PM, Donald Whittemore via cctalk
> wrote:
>
> I am an old mainframe guy. I could give you my COBOL deck of cards or the
> compile listing. You could pour through the code looking for
> nefarious/malicious code. I then hand you the object deck. You have no idea
> i
> On Feb 2, 2025, at 7:42 PM, Robert Feldman via cctalk
> wrote:
>
>
> My vote for the worst connector screw-up is the AT&T (Olivetti) 6300. Its
> monochrome monitor used a DB25 to supply both the signals and 12 volts to
> power the monitor.
>
> Bob
DEC did something similar with the Pro
> On Feb 2, 2025, at 3:23 PM, Jonathan Stone via cctalk
> wrote:
>
>
> On Sunday, February 2, 2025 at 11:47:24 AM PST, Steve Lewis via cctalk
> wrote:
>
>
>> [...] "bit banging" (imo) is the
>> host system doing the work of producing the start/stop bits on its own.
>> Which seems to be a
> On Feb 1, 2025, at 5:57 PM, Chuck Guzis via cctalk
> wrote:
>
> On 2/1/25 13:31, Frank Leonhardt via cctalk wrote:
>
>> I started with minilogs which were +/- 10V logic.
>>
>> Anyone remember those?
>
> I remember HTL (15V) being basically a high-voltage version of DTL.
>
> --Chuck
Sim
> On Feb 1, 2025, at 8:37 AM, Frank Leonhardt via cctalk
> wrote:
>
> On 01/02/2025 02:31, roger arrick via cctalk wrote:
>> In 1977, at age 16, I went to work for Noakes Data Communications in Irving
>> Texas.
>>
>> We built an 8080 industrial computer, made modems, and repaired lots of co
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