> On 05/31/2024 8:11 PM CDT CAREY SCHUG via cctalk
> wrote:
>
> Sorry, WRONG.
>
> --Carey
>
Why do I feel like I'm observing a first grade classroom where the boys are
arguing about whose dad can beat up the others?
Grownups never understand anything by themselves and it is tiresome for
> On 05/20/2024 12:06 PM CDT CAREY SCHUG via cctalk
> wrote:
>
>
> so, just curious. how do digital TVs (and monitors) work? I presume the dots
> are a rectangle, not sloping down to the right, no half a line at the top and
> bottom. Do they just assume the brain can't tell that (for the
> On 05/20/2024 1:02 PM CDT Wayne S via cctalk wrote:
>
>
> In the vt100, setup menu “B” had an interlace on or off setting.
> I just looked it up.
>
>
That is almost certainly setting what type of signal is generated. Like a TV
of the same era, the monitor (display) portion doesn't
> On 05/19/2024 8:50 AM CDT Henry Bent via cctalk wrote:
>
>
> On Sun, May 19, 2024, 08:08 Will Cooke via cctalk
> wrote:
>
> > I have a couple of 70s/80s "home" computers (e.g. Radio Shack Color
> > Computer) that are intended to connect to a TV s
I have a couple of 70s/80s "home" computers (e.g. Radio Shack Color Computer)
that are intended to connect to a TV set. They don't have easily available
composite video, even internally, only modulated RF output. Currently I have an
old CRT TV that I use with them, but for various reasons that
> On 05/09/2024 5:46 PM CDT ben via cctalk wrote:
>
> Did any one make a REAL TIME OS the 386?
There were / are quite a few.
https://en.wikipedia.org/wiki/Comparison_of_real-time_operating_systems
The 386ex was specifically intended for embedded systems.
The first one that came to mind,
> On 05/09/2024 7:24 AM CDT Bill Degnan via cctalk
> wrote:
>
>
> Mike
> I was thinking operating systems and the early launch version IBM PC, but
> yes once the hardware caught up Turbo Pascal was a popular program now that
> I think about it. So I guess the PC versions just needed more
> On 05/06/2024 8:58 PM CDT Fred Cisin via cctalk wrote:
>
>
> Ignorant question:
>
> Q: When looking for current availability of bulk tape/disk demagnetizers,
> on eBay, I ran into a lot of CD/DVD demagnetizers
> What kind of a problem do they have with magnetism?
>
> Or is this like the DVD
Some may find this interesting. Microsoft has released the source for MS-DOS
versions 1.25, 2, and 4.
https://github.com/microsoft/MS-DOS
Will
Grownups never understand anything by themselves and it is tiresome for
children to be always and forever explaining things to them,
Antoine de
> On 04/21/2024 7:06 PM CDT Peter Coghlan via cctalk
> wrote:
>
>
>
> Why is that? Did the Z80 take more cycles to implement it's more complex
> instructions? Is this an early example of RISC vs CISC?
>
> Regards,
> Peter Coghlan
I'm certainly no authority, but I have programmed both
I think he means Bowmar
https://spectrum.ieee.org/the-consumer-electronics-hall-of-fame-bowmar-901b
> On 04/16/2024 5:34 AM CDT ED SHARPE via cctalk wrote:
>
>
> No bomar brand
>
> Sent from AOL on Android
>
> On Mon, Apr 15, 2024 at 7:15 PM, Wayne S wrote:
> Bomar as in the Bomber Aircraft?
You mentioned that the TRS-80(s) have hard disks. Perhaps the extra space
taken by the hard disk bios is the culprit. Maybe a floppy-only machine (with
floppy only bios) is the only way to compile it.
Will
Grownups never understand anything by themselves and it is tiresome for
children to
I used to have a Tek 453(?) that was really nice. I sold it when I got a Tek
7201(?) 1Ghz model. I recently sold it. I hated getting rid of it but it was
big enough to be used as a small desk and weighed more than my back could
handle any more. I still have a 561A that I've been meaning to
> On 03/30/2024 3:37 PM CDT Just Kant via cctalk wrote:
>
>
> Clearly all or virtually all chineseum, correct?
>
> That being the case, um, what type.of.quality can be expected? Some are
> fairly cheap. I guess thenworld isn't to be expected.
I'm not clear on whether you mean some specific
> On 02/27/2024 2:13 PM CST Doug McIntyre via cctalk
> wrote:
>
>
> On Tue, Feb 27, 2024 at 11:10:34AM -0700, ben via cctalk wrote:
> > PS: With low cost Chinese PCB's and vintage parts, why are people not
> > building real hardware replica's of interesting machines.
> But they are..
You
> On 02/21/2024 5:01 AM CST Tony Duell via cctalk wrote:
> >
> > Did someone port it to other arch than ARM ?
> The oldest version I know of ran on PDP11s. I am pretty sure there was
> a 68000 version at one point too.
>
> -tony
Wasn't the Amiga OS built on Tripos?
Will
Grownups never
> On 01/31/2024 11:34 AM CST Henry Bent via cctalk
> wrote:
>
>
> On Wed, 31 Jan 2024 at 12:13, Liam Proven via cctalk
> wrote:
>
> I write for an international audience and sometimes people from the
> > USA are openly and repeatedly incredulous that "obscure" British
> > computers -- that
> On 01/29/2024 2:00 PM CST Sellam Abraham via cctalk
> wrote:
>
>
> On Mon, Jan 29, 2024 at 9:55 AM William Sudbrink via cctalk <
> cctalk@classiccmp.org> wrote:
> > dripping. Anyway, like Wile E Coyote, after I had shoved a screwdriver
> > under the uncooperative anode cap and finally
> On 01/14/2024 1:54 PM CST Jonathan Chapman via cctalk
> wrote:
>
>
> Bill,
>
> If it's an older clock it's probably tripping over a timecode transmission
> format/modulation change. I forget the exact details but changes were
> required to my old 8085-based Spectracom receiver.
>
>
More information is here:
https://firstmicroprocessor.com/?doing_wp_cron=1700608229.8666059970855712890625
I think that is the designers (Rod Holt?) website. Apparently he won a legal
battle to use the term "first microprocessor" for whatever that is worth.
Will
> On 11/21/2023 2:56 PM CST
> On 10/13/2023 8:56 AM CDT Paul Koning via cctalk
> wrote:
>
>
> > On Oct 13, 2023, at 4:41 AM, Christian Corti via cctalk
> > wrote:
> >
> > ...
> > And the interesting part will be to build the DC power supply for the many
> > voltages (-270V, -130V, -60V, +140V, +270V) and the
> On 09/23/2023 3:25 PM CDT Warner Losh via cctalk
> wrote:
>
>
> On Sat, Sep 23, 2023, 12:31 PM Paul Koning via cctalk
> wrote:
>
> >
> >
> > > On Sep 22, 2023, at 3:07 PM, Chuck Guzis via cctalk <
> > cctalk@classiccmp.org> wrote:
> > >
> > > On 9/22/23 11:34, emanuel stiebler via
> On 09/22/2023 6:26 PM CDT Mike Katz via cctalk wrote:
>
>
> I plan on controlling the gate array with an RP2040 dual core cortex M0
> running at 133 MHz and 8 PIO processors.
>
Hi Mike,
Since you are planning to use a micro anyway, and it doesn't appear you will
need a great deal of
> On 09/11/2023 12:18 PM CDT ben via cctalk wrote:
>
> Did Algol in general have memory leaks?,or is just C and Windows.
Not sure about the language, but at this point most of its programmers have
memory leaks.
Will
If you want to build a ship, don't drum up people to collect wood and
> On 09/10/2023 3:00 PM CDT Fred Cisin via cctalk wrote:
>
>
> On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote:
> > Now, let's talk about 2.8" and 3.25" drives; UK readers are certainly
> > familiar with 3.0 inch CF drives used on Amstrads.
> Amdek? sold a dual 3" drive in USA, marketed as
> On 09/02/2023 8:50 AM CDT Peter Corlett via cctalk
> wrote:
>
>
> On Fri, Sep 01, 2023 at 04:32:57PM -0600, ben via cctalk wrote:
> [...]
> > I think that way has been for a while. Having a hard time finding a 68B50
Unicorn Electronics has the 68B50 for $7.99
> On 09/01/2023 12:42 PM CDT Chuck Guzis via cctalk
> wrote:
>
>
> On 9/1/23 10:23, Will Cooke via cctalk wrote:
> > They made pistols:
> > https://www.popularmechanics.com/military/weapons/a23340620/singer-sewing-machine-company-45-pistol-gun/
> >
They made pistols:
https://www.popularmechanics.com/military/weapons/a23340620/singer-sewing-machine-company-45-pistol-gun/
Will
>
> On 9/1/23 09:02, Tony Duell via cctalk wrote:
>
> >> The keyboard was from a surplus Singer data entry machine ( I thought they
> >> only made sewing machines
> On 08/28/2023 3:48 PM CDT Paul Koning via cctalk
> wrote:
>
> Lander, in FOCAL? The only one I know is for the GT40, in assembler.
>
> paul
Apparently the original version was in FOCAL.
https://www.cs.brandeis.edu/~storer/LunarLander/LunarLander.html
Will
> On August 28, 2023 8:24 AM CDT Holm Tiffe via cctalk
> wrote:
>
>
> Hi guys,
> I have 8 "new" Chips from Signetics, they are labeled:
>
> S7536
> N8220B
>
> and on the backside between the pins "8220".
>
> Does anyone know what they do? My search with google and
> in the 1976 Signetics
> On 07/11/2023 9:59 AM CDT Paul Koning via cctalk
> wrote:
> But, judging by Wikipedia, the earlier Synclavier models were not digital
> sampled waveform synthesizers but rather FM synthesizers. So I still wonder
> if anyone did it earlier than Sherwin.
>
> paul
Possibly the Computer
> On 07/09/2023 1:46 PM CDT Douglas Taylor via cctalk
> wrote:
>
>
> I was surprised to see that it took ~34 ms to run through all the
> numbers from 0-, that is about 34 Hz. The manual says the 'settling
> time' is 6 microseconds. Is this fast enough for audio?
>
> How would you
> On 07/08/2023 8:36 AM CDT Alexander Schreiber via cctalk
> wrote:
>
>
> On Sat, Jul 08, 2023 at 12:49:43PM +1000, Doug Jackson via cctalk wrote:
> > To be completely honest, Electrotechnology students with 415v DC bench
> > supplies and HV caps all learnt very quickly not to catch
> On 06/14/2023 4:47 PM CDT Bill Degnan via cctalk
> wrote:
>
>
> Obviously I opened the box. So Inguess the Turbo board is just
> "motherboard"
> Bill
>
Back in those days I made my living assembling and repairing those XT machines.
The motherboards were almost universally from a
> On 06/14/2023 12:58 PM CDT Bill Degnan via cctalk
> wrote:
>
> As far as the Bill Gates quote, I do remember reading an actual longer
> quote somewhere (?), the context was lost from a larger paragraph if one
> takes just the snippet statement IIRC.
>
Maybe the longer quote was "I never
> On 06/07/2023 1:26 PM CDT Jonathan Katz via cctalk
> wrote:
>
>
> Hello!
>
> I have an IBM 6152 aka IBM RT system I rescued. (It may be a 6151?)
> I'm 90% sure it has colour graphics. The system does seem to POST
> correctly (according to the LED on the front) but the CRT is dead. I'm
>
> On 06/02/2023 10:56 AM CDT John Floren via cctalk
> wrote:
>
>
> Anyone on the list have a VT-180 a.k.a "Robin"? I got one for free a while
> back, but no disks. Wondering if anyone's in a position to make copies of
> their working disks and mail them to me -- I could have blanks sent,
> On 05/31/2023 3:33 PM CDT Mike Katz via cctalk wrote:
>
>
> I think I will just convert file sizes to lengths of paper tape for
> comparison:
>
> 1K 102.4"
> 10K 85'
> 100K 853'
> 1M 1.6 Miles
> 10M 16.5 Miles
> 100M 165 Miles
> 1G 1,695 Miles
> 10G 16,947 Miles
> 100G 6.8 Earth
> On 05/25/2023 11:13 AM CDT Mike Katz via cctalk wrote:
>
>
> Chuck,
>
> I agree with you that well written and commented C is the way to go.
>
> The advantage to an IDE comes with debugging and easy access symbols and
> variables.
>
Some IDEs can be convinced to use standard makefiles.
> On 04/12/2023 8:26 AM CDT Bernd Kopriva via cctalk
> wrote:
>
>
> Thanks for the link ...
> ... i will ask him if this my help.
>
> Thanks Bernd
>
It may also be useful to contact the CS/EE department(s) at ETH and ask them.
Perhaps they have a copy archived with the project
> On 03/09/2023 1:24 AM CST Steve Lewis via cctalk
> wrote:
>
>
> Thank you all for the notes (and feedback).
>
> The 1964 skit of Patty Duke using that Univac-422 - all the markings of a
> personal computer right there, no doubt. But dragging that into a home
> doesn't make it a home
> On 03/08/2023 2:42 PM CST Sellam Abraham via cctalk
> wrote:
>
>
> On Wed, Mar 8, 2023 at 12:40 PM Will Cooke via cctalk
> wrote:
So, how do we get them interested? I
> > can't think of a better idea than asking one of the few that IS
> > interested. C
> On 03/08/2023 2:21 PM CST Sellam Abraham via cctalk
> wrote:
>
>
> On Wed, Mar 8, 2023 at 11:55 AM Will Cooke via cctalk
> wrote:
>
> >
> > > On 03/08/2023 11:59 AM CST Tarek Hoteit via cctalk <
> > cctalk@classiccmp.org> wrote:
> >
> On 03/08/2023 11:59 AM CST Tarek Hoteit via cctalk
> wrote:
>
> We probably need to get more advice from her on what we all, old-school
> timers, should do to help keep the legacy going on !
>
> Regards,
> Tarek Hoteit
>
That statement may be the most important one on this list in a
> On 02/21/2023 10:48 PM CST Eric Smith via cctalk
> wrote:
>
> Profile trivia:
>
> The firmware _inside_ the Profile is strange in that it doesn't actually
> KNOW the size of the Profile it's installed into. At power up, when the
> drive reads the home block, the drive size is stored
> On 02/10/2023 9:53 AM CST Sellam Abraham via cctalk
> wrote:
>
>
> DDG is just a Google fish bowl. Same data set, similar results.
>
> If you're concerned about privacy, there are much better options available.
>
> Sellam
>
I would be interested in knowing some of those options.
who here...
> > > Steve
> > >
> > >
> > > On 2/8/2023 7:47 PM, Glen Slick via cctalk wrote:
> > > > On Wed, Feb 8, 2023 at 7:17 PM Will Cooke via cctalk
> > > > wrote:
> > > > > This place may be of interest. Most
This place may be of interest. Most of the stuff they have for sale probably
isn't of much interest here, but there are a few gems. The link takes you to
one, which is how I found it.
https://www.bryanipad.shop/product/microlog-corporation-atr-6800-vintage-rare-738148146177114113.html
Not
> On 02/03/2023 8:25 AM CST Paul Koning via cctalk
> wrote:
> It's puzzling that temperature would matter. Obviously, when you hit the
> Curie temperature the data goes away, but for typical magnetic materials that
> is in the hundreds of degrees. Does the hysteresis curve shift enough at
> On 02/02/2023 10:03 AM CST Sellam Abraham via cctalk
> wrote:
>
>
> This discussion on core memory got me thinking:
>
> Is it possible to "read" core memory by examining each core using some kind
> of instrument that would sense its "charge" (or lack thereof)
> non-destructively?
>
>
> On 02/01/2023 3:51 PM CST Paul Koning via cctalk
> wrote:
>
ot sure about that. What sort of numbers are we talking about?
>
> If all else fails there's core memory, which as far as I remember is pretty
> much unlimited for both read and write.
>
> paul
I don't know for sure and can't
> On Monday, January 30, 2023, 01:02:16 AM EST, Jim Brain via cctalk
> wrote:
>
> Over at the CoCo Mailing List, there's a archeological discussion about
> the DLOAD BASIC command in older versions of the Color Computer BASIC.
> It uses the serial port (and no doubt was designed for computer
> That was a common practice in those days. I remember seeing news stories
> about it. I "think" a law was passed in late 80s forbidding that. A lot of
> products now say "this box was (proudly) made in the USA.
> Will
> On 01/27/2023 3:00 PM CST Bill Gunshannon via cctalk
> wrote:
>
>
> On 1/27/2023 3:53 PM, Fred Cisin via cctalk wrote:
> >>> and IBM sold what seems to be a re-badged Epson MX-80,
> >
> > On Fri, 27 Jan 2023, Bill Gunshannon via cctalk wrote:
> > > Yes, I always got a kick out of these.
> On 01/27/2023 8:41 AM CST geneb via cctalk wrote:
>
> >
> ... my freshman year of HS. I was the only guy
> in a room full of girls ...
>
> g.
>
And the downside of this was...?
Will
> On 01/24/2023 11:09 AM CST Tony Duell via cctalk
> wrote:
>
>
> A couple of questions if anyone has experience of this machine :
>
> 1) There is a 5 pin DIN socket for connecting an external video
> monitor. The signals seem to be TTL-level separate syncs at European
> TV rates (15625Hz
> On 01/21/2023 2:55 PM CST Fred Cisin via cctalk wrote:
> The first 5150 was available with one row of 16K RAM, you could plug
> whatever you had (such as from Godbout) into the other 3 rows, and almost
> anything was cheaper than IBM's prices.
>
>
> I think that the early 5160 also used
Coincidentally, I just saw this article on CNN:
https://www.cnn.com/2023/01/19/tech/chatgpt-future-davos/index.html
I think it says more about the state of education, even among the "elite," than
it does about the state of "AI."
But that's just me.
Will
ainly not what 99% of you would
have done—I stopped taking orders!"
> On 12/28/2022 6:42 PM CST Will Cooke via cctalk wrote:
>
>
> > On 12/28/2022 6:21 PM CST Chris via cctalk wrote:
> >
> >
> > I do seem to recall some off the wall looking case in the
> On 12/28/2022 6:21 PM CST Chris via cctalk wrote:
>
>
> I do seem to recall some off the wall looking case in the articles. I'm not
> going to reread them right now. I was under the misconceived assumption these
> would all be foumd in such a case.
>
Apparently they sold a LOT of them,
022 4:02 PM CST Chris via cctalk wrote:
>
>
> That's only page 1 lol.
>
> Artwork for the board/s never was published as I recall. I wonder if he still
> has it.
> On Wednesday, December 28, 2022, 04:58:34 PM EST, Will Cooke via cctalk
> wrote:
>
>
>
>
> On 12/28/2022 3:36 PM CST Chris via cctalk wrote:
>
>
> What was the name of Steve Ciarcia's outfit, Micromint? I see no entries for
> that. That bizarro-world IBM compatible he offered years ago is insane enough
> to love. Want to build me one.
His company was Micromint. The computer
> On 12/27/2022 9:57 PM CST Will Cooke via cctalk wrote:
>
>
> > On 12/27/2022 9:52 PM CST Bill Degnan via cctalk
> > wrote:
> >
> >
> > Which issue of Radio Electronics?
> > Bill
> >
> I don't know which issues it's in,
> On 12/27/2022 9:52 PM CST Bill Degnan via cctalk
> wrote:
>
>
> Which issue of Radio Electronics?
> Bill
>
I don't know which issues it's in, but they are all here:
https://worldradiohistory.com/Radio_Electronics%20_Master_Page.htm
> On 12/27/2022 9:36 PM CST Chris via cctalk wrote:
>
>
> Those are for a different board. Maybe close enough?
>
If you read the description it says the only difference is the clock chip,
which I believe is "fully" compatible.
boot eprom download -- scroll down
https://peripheraltech.com/PT68K1A.htm
> On 12/27/2022 9:04 PM CST Chris via cctalk wrote:
>
>
> What will you do for firmware? I do believe the developer was around, maybe
> still is. But wanted an enormous amount of money.
> On Tuesday, December 27,
http://peripheraltech.com/PT68K2
> On 12/27/2022 8:58 PM CST Jim Brain via cctalk wrote:
>
>
> On 12/27/2022 8:47 PM, Chris via cctalk wrote:
> > It's a IBM PC form factor 68000 based project that was featured in Radio
> > Electronics. Anyone remember it or even know what I'm talking about?
> On 12/22/2022 10:55 PM CST Chris via cctalk wrote:
>
>
> Anyone partimg with some dang-old thing? It has to work. I'm leaning towards
> a mono screen. I'm leaning against Zeniths, got 2 Minisports. But anything is
> possible.
>
> IBM produced a Kanji subbish laptop some years ago. I
> On 12/22/2022 8:45 PM CST Glen Slick via cctalk
>
> Shirley none of you are serious about a 32-bit (at least partially)
> operating system being able to execute on a 286 processor.
>
> You couldn't even run Windows 3.1 in Enhanced mode on a 286 processor.
>
> >
Well, there's always Linux
> On 12/22/2022 4:34 PM CST Chuck Guzis via cctalk
> wrote:
>
> That's not to say that Li-ion cells are without their quirks. I
> recently almost discarded a AA-sized 14500 cell because the output
> voltage had suddenly dropped to the point where none of my chargers
> would even see it. So
> On 12/22/2022 2:33 PM CST Chuck Guzis via cctalk
> wrote:
>
>
> I haven't run across a single IC dedicated to the
> process yet--I suspect there must be one out there somewhere.
>
> FWIW,
> --Chuck
There are quite a few. Mouser lists 278 that claim NiMh capability. All but 9
of
>
> I also have a selection of old PC CPUs ranging from 8088s and V20 compatible
> to early Pentium and compatibles (e.g. AMD K6) If anyone is interested
> contact me off list. I have about 15 total. I can do a quick inventory if
> anyone is interested.
>
> Will
The CPUs are now spoken
> On 12/22/2022 10:02 AM CST Cedric Amand via cctalk
> wrote:
>
>
> Hi Jim, Maybe this is specific to europe but NiCds are hard to come by here,
> they are prohibited since 2008 And even more prohibited since 2017 ( they
> also exclude medical equipment ) I used to source them in ex-ussr
> On 12/22/2022 5:56 AM CST Will Cooke via cctalk wrote:
>
>
>
> I have an assortment of old dynamic RAM chips:
> 1M x 1 approx 35
> 256K x 4 approx 40 to 50
> 256K x 1 approx 80 to 100
>
The RAM chips are all spoken for.
I also have a selection of old
I think my original message didn't go through (forgot to select plain text
instead of html.) If it did I apologize for spamming the list.
I'm clearing out some clutter so I can get to some more clutter to clear it
out. Much of my clutter is classic computer related (at least by my
> On 11/26/2022 12:47 PM CST Rob Jarratt via cctalk
> wrote:
>
>
> Just trying to decide what to replace the failed diode with, and looking at
> the UF400x series, as suggested by Mattis. It seems to me that as long as the
> PIV is 200V or higher it should be fine from that point of view,
> On 09/15/2022 11:01 PM CDT Cameron Kaiser via cctalk
> wrote:
>
>
> Trying to identify two cables I ended up with, one to DE-9 and one to Mac
> 8-pin
> mini-DIN. The other end on both is a male 9-pin mini-DIN. These clearly look
> like serial cables, but to what? A cursory Google didn't
> On 09/11/2022 12:47 PM CDT Jeffrey Brace via cctalk
> wrote:
>
>
> The following info is found here: https://vcfed.org/vcf-swap-meet/, but I'm
> pasting here for your reference.
>
Interesting. Unless I'm blind, nowhere in that email or the linked flyer does
it state what city and
> On 09/02/2022 11:05 AM CDT geneb via cctalk wrote:
>
>
> On Fri, 2 Sep 2022, Fred Cisin via cctalk wrote:
>
> > well, 720, not 7K
> No, it was actually some absurdly huge number. It has something to do
> with how the AS hardware & software was working out the RPM of the drive.
>
> g.
My
Next week I will be in the Huntsville, Al, USA area for an entire day with no
commitments. Does anyone have recommendations on how to spend my day? I have
been to the space and rocket museum several times. Any computer museums or
displays, especially of space-related equipment? Any good surplus
In case you aren't aware of it, there was a bbs magazine. Just ran across this:
https://archive.org/details/bbsmagazine
Will
You don't understand anything until you learn it more than one way.
Marvin Minsky
Apparently there was a BBS magazine. Just happened across this.
https://archive.org/details/bbsmagazine
Will
You don't understand anything until you learn it more than one way.
Marvin Minsky
> On 07/31/2022 7:29 PM CDT William Sudbrink via cctalk
> wrote:
>
>
> Hi,
>
>
>
> What is the "correct" name for the style (technology?) of circuit board
> layout images where the top is blue, the bottom is red and overlaps are
> purple? Also, any silkscreen is black. I thought someone
> On 05/15/2022 11:02 PM John Ball via cctech wrote:
>
>
> I just received a machine that someone found at a Vancouver second hand
> store that I basically told them to buy on the single fact I don't own any
> COSMAC machines and I've now had a chance to take it apart and photograph
> the
> On 05/12/2022 2:14 PM Peter Coghlan via cctalk wrote:
>
>
> Wayne S wrote:
> >> On May 12, 2022, at 09:56, Peter Coghlan via cctalk
> >> wrote:
> >>
> >> Toby Thain via cctalk wrote:
> On 2022-05-11 7:02 p.m., Peter Coghlan via cctalk wrote:
> Given the normal usage that has
I have done a quick and dirty scan of the manual. It is available here:
http://wrcooke.net/comtec_p135_20_35_ppunch001.pdf
Will
> On 05/01/2022 2:28 PM Wayne S wrote:
>
>
> Seconded. Punches have to be made to exact tolerances and should be made of a
> very hard material, (because they can quickly become dull ) that requires
> special machine tools to manufacture.
>
>
Sorry, didn't mean to imply I would do it
> On 04/30/2022 2:09 PM amp1...@gmail.com wrote:
>
>
> Hi Will,
>
> Is the punch you received capable of punching 8-level tape? While the PDF on
> Surplus Sales of Nebraska's site says the unit can punch 5- to 8-level tape,
> one of the photos on the site,
>
> On 04/30/2022 5:25 PM Rob Jarratt via cctalk wrote:
>
>
>
> I noticed that the chip (original and replacement) was drawing 100-110mA
> from the bench PSU, which seems a bit high.
>
>
>
> I wondered if I might need a pull up resistor on the output, but my
> understanding is that this
A month or two ago, someone mentioned this paper tape punch available from
Surplus Sales of Nebraska.
https://www.surplussales.com//Equipment/mil.html
I think someone had a similar model and was looking for information.
I ordered one on Tuesday or Wednesday and got it today. It came with
> On 04/12/2022 2:11 PM Yeechang Lee via cctech wrote:
>
>
> Eric Dittman says:
> > There's a 2K hole in the Model I memory map above the ROM
> Is this the hole that causes stock Model I to not run CP/M?
>
The ROM at address 0 is the bigger issue. CP/M requires RAM starting at
address 0.
> On 04/12/2022 12:42 PM Wayne S via cctech wrote:
>
>
> Thanks for the info about IMP.
> But now i’d have to question IMP routers being around in 1970 since the
> internet wasn’t around yet.
>
>
The first response of "Interface" Message Processor is more correct. There was
a LOT of
2020: oops
Here:
https://tcf-nj.org/wp-content/uploads/2022/03/TCF2022-SCHEDULE-TALK-INFO-PIXs.pdf
> On 04/11/2022 8:48 AM Will Cooke via cctech wrote:
>
>
> > On 04/11/2022 7:43 AM Chris Zach via cctech wrote:
> >
> >
> > On 4/10/2022 6:05 PM, Ethan Dicks wrote:
> > > Totally unrelated
> On 04/11/2022 7:43 AM Chris Zach via cctech wrote:
>
>
> On 4/10/2022 6:05 PM, Ethan Dicks wrote:
> > Totally unrelated event.
> Ok. Does TCF still happen?
>
> >
It appears so:
https://tcf-nj.org/program/
About 3 weeks ago.
Will
> On 04/07/2022 2:50 PM Joshua Rice via cctalk wrote:
>
>
> Hi all,
>
> I’ve recently come across something i’ve soon realised really quite unusual.
> An RCA MS2000 MicroDisk Development System.
>
> I’m very green to the COSMAC scene, with this being my first 1802 machine.
> I’m very
> On 04/03/2022 8:34 AM Magnus Ringman via cctech wrote:
>
>
> On Fri, Apr 1, 2022 at 10:26 PM Marc Howard via cctech <
> cct...@classiccmp.org> wrote:
>
> > We need to onshore Nixie production now! ;-)
>
> Gentle plug for https://www.daliborfarny.com/.
I got excited by that until I saw
> On 03/16/2022 2:58 PM Fred Cisin via cctech wrote:
>
>
> > On Wed, 16 Mar 2022, Diedrich, Bryce via cctech wrote:
> > > Just got a Commodore Vic-20. What is the safest way to power it off when I
> > > am done using it?
> On Wed, 16 Mar 2022, geneb via cctech wrote:
> > Turn it off.
> Then
> On 02/25/2022 2:23 PM Paul Berger via cctalk wrote:
>
>
> The 8048 is a mask programmed part, there is an EPROM version 8748.
> While the 8048 is mask programmed I believe that the contents of the ROM
> can be dumped.
>
>
As Paul said, the 8048 is mask programmed. However, I agree it is
> On 02/01/2022 4:08 PM Chuck Guzis via cctalk wrote:
>
>
>
> Good grief, it took DEC all that time? CDC was doing it in the 1960s.
> Had to, because of the wide variety of RMS available. I think that
> one of the early 2311 clone drives (854?) used 256-byte (8 bit byte)
> hard-sectored
Partitioning on micros goes back to at least 1979 with CP/M 2.2.
See the CP/M 2.2 alteration guide on bitsavers:
http://bitsavers.trailing-edge.com/pdf/digitalResearch/cpm/2.2/CPM_2.2_Alteration_Guide_1979.pdf
Will
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