The Tek 465/475 scopes are the best analog scopes ever made, IMHO. And
with the best analog triger
I think you might be able to get the cat eye to work on a sampling scope
by adjusting the persistence. At least that's what I would do with my
PicoScope.
On 10/2/2024 8:28 PM, Jonathan Chap
Floppy Alignment disks have analog signals of varying intensity recorded
on them. A flux detector like the greaseweazle is a binary
(presence/absence) device.
It also has off track signals on it. I don't think there is any way to
create them with anything but a specially modified drive conne
And or course if you wanted to align the Processor Technology Helios-II
drives you were in for an afternoon of "fun".
Persci drives with voice coil head steppers and one spindle motor for
both drives.
On 10/2/2024 8:53 PM, Fred Cisin via cctalk wrote:
Some of the old-timers might remember
) via cctalk <
cctalk@classiccmp.org> wrote:
> Hey Mike,
>
> Did the wire wrap tool sell? Is it any good for DEC backplanes?
>
>
> Thanks,
>
> Ryan
>
>
> On 2024-08-31 10:29 a.m., Mike Stein via cctalk wrote:
> > If I can find it, is anyone interested i
d by volunteers happy to answer questions.
-mike
-Original Message-
From: David C. Jenner via cctalk
Sent: Saturday, September 14, 2024 10:23 PM
To: General Discussion: On-Topic and Off-Topic Posts
Cc: David C. Jenner
Subject: [cctalk] Re: auction starting in 50 minutes
Yes, LCM had j
Available at the curb in front of my house for free, with spare ribbons and
balls...
On Thu, Sep 12, 2024 at 9:19 PM cctalk--- via cctalk
wrote:
> Saw a pair of Selectric typewriters went for $8k. Available on eBay for
> 200-400.
>
I actually used the 046 non-printing version back in the day to convert PPT
to 80 col. cards, although I didn't deal with the tape it produced; cool
machine.
https://bitsavers.trailing-edge.com/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
On Mon, Sep 9, 2024 at 11:20 PM Fred Cisi
:
There is a 47 tape to card punch
I don't think that I ever saw one of those.
Was it IBM?
When was it available?
IBM 047 Tape-To-Card Printing Punch:
http://q7.neurotica.com/046-1.jpg
http://q7.neurotica.com/046-2.jpg
Mike Loewen mloe...@cpumagic.scol.pa.u
ugh 5)?
I will be benchmarking the new build of the PiDP SIMH software on a
bunch of different Pi's so compatibility is an issue.
Thank you,
Mike
P.S. Is there any chance you will be at VCF Midwest this year?
ugh 5)?
I will be benchmarking the new build of the PiDP SIMH software on a
bunch of different Pi's so compatibility is an issue.
Thank you,
Mike
P.S. Is there any chance you will be at VCF Midwest this year?
On Sat, 31 Aug 2024, Johan Helsingius via cctalk wrote:
On 31/08/2024 19:34, Alexander Schreiber via cctalk wrote:
Well, everybody who watched the documentary "Iron Sky: The Coming Race"
knows that, of course.
And if you haven't seen the original Iron Sky then you will never
appreciate Spac
If I can find it, is anyone interested in a battery-powered wire wrap tool?
Not sure of the diameter but it's larger than an IC socket, so I suspect
that it is in fact for a backplane.
Postage from Toronto.
On Sat, Aug 31, 2024 at 1:55 AM Vincent Slyngstad via cctalk <
cctalk@classiccmp.org> wrot
We can't have any mud bloods amongst our ranks, now can we. 😂
On 8/30/2024 2:33 PM, Bill Gunshannon via cctalk wrote:
On 8/30/2024 1:45 PM, Norman Jaffe via cctalk wrote:
You do realize that 'Pureblood' is a phrase most definitely
associated with the Aryan Nations and other neo-Nazi, white
And then there's the story in the bible about Jesus throwing the people
selling indulgences (and other things) out of the temple?😮
That kind of thing has been going on for thousands of years. It
predates Catholicism but became a part of the Catholic Church in the
11th and 12 centuries.
This
Unless the museum has an large enough endowment to take care of itself
and grow it will fail.
I'm sure even the Smithsonian discards items that is can no longer
afford to house. And that is after it has sat in storage for years.
Whether publicly, privately or government funded expenses and t
Doug,
I will call Sallam in a little bit.
Thank you,
Mike
On 8/23/2024 8:23 AM, Paul Koning via cctalk wrote:
On Aug 17, 2024, at 7:17 PM, John Herron via cctalk
wrote:
I still remember how amazing it was to watch the Linc-8 at VCF (west) 10
being troubleshot by previous
has a 2100A at the same
price, also with no boards. I'd say $2,000 would be tops for a 2100S, fully
populated.
Mike Loewen mloe...@cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
e provided).
Please see me at the show for my address.
I hope to see you there.
Mike Katz
+1 (773) 414-1044 (Cell)
.
On 8/16/2024 1:38 AM, ben wrote:
On 2024-08-15 7:46 p.m., Mike Katz wrote:
That is the reason for the stdint.h file. Where you specify the width
of the variable in bits
Looks like a useless file to me.
I never liked any the standards made to C after K&R. Seems more driven
by the latest cr
+= bar();
Will force the correct order of execution of the functions while not
taking any more CPU cycles.
Mike
On 8/15/2024 7:32 PM, Fred Cisin via cctalk wrote:
On Thu, 15 Aug 2024, Mike Katz wrote:
C has specific specifications for what is promoted when and how. They
are not
I have written several coding standards and comments are always primary
in importance.
The Misra C standard does a pretty good job of forcing the programmer to
aim for something other than their foot with their rope 🙂
I am amazed at how many fresh outs I have met who really can't program
the
That is the reason for the stdint.h file. Where you specify the width
of the variable in bits
int8_t, int16_t, uint16_t. etc.
On 8/15/2024 8:39 PM, ben via cctalk wrote:
On 2024-08-15 6:46 p.m., Fred Cisin via cctalk wrote:
When I was teaching C, it was sometimes quite difficult to help
stud
Fred,
That is true, Order of expression is undefined between execution points
that is why the following statement can produce different results on
different compilers:
A = 1;
F = A++ * A++;
Without the use of parenthesis the is no way for the user to know
beforehand what the value of F will
operators are still required to remove extra range
and precision. See
5.2.4.2.2 regarding evaluation formats.
On 8/15/2024 6:54 PM, Will Cooke via cctalk wrote:
On 08/15/2024 6:10 PM EDT Mike Katz via cctalk wrote:
I'm pretty certain you are wrong about the byte case below.
u. I heavily typecast and parenthesize
my code to avoid any possible ambiguity. Sometimes for the compiler and
sometimes for someone else reading my code.
Mike
On 8/15/2024 6:09 PM, Fred Cisin via cctalk wrote:
On Thu, 15 Aug 2024, Paul Koning via cctalk wrote:
I don't know about t
On 8/15/2024 3:41 PM, Sean Conner via cctalk wrote:
It was thus said that the Great ben via cctalk once stated:
I don't know about the VAX,but my gripe is the x86 and the 68000 don't
automaticaly promote smaller data types to larger ones. What little
programming I have done was in C never car
When signed and unsigned values (variables or literals) of the same size
are combined the compiler assumes that all of the values are signed.
This can yield a problem if the unsigned integer is large enough that
the most significant bit is set because this bit indicates sign.
for example:
ui
I'm afraid you might not understand how promotion works in C. Promotion
has nothing do to with the word size of the machine it's running on.
Within the expression, all intermediate values and literals are promoted
to the smallest type that can contain the largest value/literal in the
expressio
Don't forget about CMD and the Power Shell...
On Wed, Jul 31, 2024 at 10:33 AM CAREY SCHUG via cctalk
wrote:
>
> Am i the ONLY person who preferred the win 3.1 user interface? Probably,
> since I have never seen one like it on linux, and everybody else complains
> about it.
>
> 1. I don't like
est.com to make arrangements.
Thank you,
Mike.
ete values, as opposed to operating on continuous data elements, which
would be analog.
I would classify it as an electromechanical digital computer. Also, it's
pretty neat, and I want one!
-mike
Rather than trying a kind o fidonet like transportation system why don't
we work together to negotiate a rate with a national electronic
equipment mover.
Maybe through the ausipices of an existing non-profit organization like
the VCFED or maybe an organization of museums.
Good luck.
On 7/2/
ings fast.
>
> On Tue, Jul 2, 2024 at 5:42 AM Ethan Dicks via cctalk
> wrote:
>
> > On Mon, Jul 1, 2024 at 8:28 PM ben via cctalk
> > wrote:
> > > On 2024-07-01 6:04 p.m., Mike Stein via cctalk wrote:
> > > > Hey, I sent you a motherboard from Toronto all t
Not an unreasonable idea with today's drones...
On Mon, Jul 1, 2024 at 10:51 PM Chuck Guzis via cctalk
wrote:
>
> On 7/1/24 19:04, Wayne S wrote:
> > Hda weighs about 50lbs so you aren’t carrying it very far.
>
> Well, a trebuchet then. How wide is the Detroit river at its narrowest?
>
> Serious
Ask Ethan; I suppose a lot of stuff did actually get left behind.
On Mon, Jul 1, 2024 at 8:28 PM ben via cctalk wrote:
>
> On 2024-07-01 6:04 p.m., Mike Stein via cctalk wrote:
> > Hey, I sent you a motherboard from Toronto all the way to the South
> > Pole, remember? Well, OK,
Odd; in my experience shipping US to Canada is generally cheaper than
in the opposite direction. I'm still amazed by the rates from China;
maybe it's cheaper to send from Canada to someone in China and have
them send it back to the US ;-)
On Mon, Jul 1, 2024 at 8:02 PM Sellam Abraham via cctalk
w
I've had the same experience with folks in Australia & NZ,
accumulating stuff in the US until there's enough to ship it down
under.
On Mon, Jul 1, 2024 at 8:07 PM Sellam Abraham via cctalk
wrote:
>
> On Mon, Jul 1, 2024 at 2:12 PM Ethan Dicks via cctalk
> wrote:
>
> > On Mon, Jul 1, 2024 at 7:58
A few years ago some kind soul sent me a couple of 5 1/4" HS Vector
Graphic diskettes from Minnesota to Toronto; as I recall, it cost him
about U$2.00. After copying them I forwarded them to another VG owner
in Winnipeg, a few hundred miles from the original sender, and it cost
C$10.00!
Australia
Hey, I sent you a motherboard from Toronto all the way to the South
Pole, remember? Well, OK, via San Francisco, but It wasn't too bad
then.
Canada to US customs forms (just one, actually) have actually been
simplified, but alas, postage rates are still outrageous.
m
On Mon, Jul 1, 2024 at 5:12
Look in the for sale forums at vcfed.org.
'
The Vintage Computer Federation.
On 6/27/2024 10:46 AM, Mark Linimon via cctalk wrote:
On 06/27/2024 9:36 AM CDT Bill Gunshannon via cctalk
To date, I have sold nothing. I once went back to the list that
suggested I use ebay to report my failure only
Saturday, June 22 from 8:00 - 2:00 across from the Infoage campus in NJ.
https://vcfed.org/vcf-swap-meet/
Mike Loewen mloe...@cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
On Mon, Jun 17, 2024 at 4:07 PM John Robertson via cctalk
wrote:
>
> On 2024/06/17 12:26 p.m., Ethan Dicks via cctalk wrote:
> > On Mon, Jun 17, 2024 at 1:53 PM Mike Katz via cctalk
> > wrote:
> >> I remember running this program at school in the mid 1970's.
>
I remember running this program at school in the mid 1970's.
This runs on 4K Focal '69 without the extended functions enabled. So it
should run on a 4K PDP-8/L.
I think I might have actually run it on a 4K PDP-8/L with an ASR-33
Teletype sometime between 1972 and 1975. I know I ran it on a P
Even earlier than the TPU on the 68332 is the communications
co-processor built into the 68302. This predate the entire CPU-32 family.
On 6/13/2024 10:56 AM, Adrian Godwin via cctalk wrote:
Even without things like system management mode, there are lots of speed-up
features on modern processor
Maybe they are thinking that because it is oil it will work like an oil
can load.
Sound to me like the originator of this is a big load of dummy🙂
On 6/12/2024 8:28 PM, mark audacity romberg via cctalk wrote:
Yeah, something’s missing here, teletype paper is for sure not good as a dummy
load.
Not sure I share your definition of 'fun'...
On Thu, May 30, 2024 at 8:29 AM Bill Degnan via cctalk
wrote:
>
> On Thu, May 30, 2024 at 2:06 AM John Herron via cctalk <
> cctalk@classiccmp.org> wrote:
>
> > Only because I thought it would be funny to hear ChatGPT's wrong answer.
> > Here is ChatGP
I believe that place on Elston was either Joseph Electronics or The
American Science Center depending on whether is was in Chicago or Niles.
On 5/28/2024 8:06 PM, CAREY SCHUG via cctalk wrote:
We spent 64-65 in japan, bought a TV, brought it back, channels were different,
so i bought a surplus
Fred,
I'm sorry but those arguments are religion to most of us and the clear
answer has already been decided (tongue firmly implanted in cheek)😛
1. Between Vi and EMACS - Any editor where you have a cursor movement
mode that is separate from edit mode (since the invention of arrow keys
or t
Paul, you said:/
/
/I'd say an OS is a software system that runs on bare metal (or
equivalent, like a VM) and offers a set of services intended to make
creating and running applications easier. In that sense, RT-11 SJ or
OS/360 PCP are operating systems, just as Linux is. QRQ is on the edge
(
Thanks for the info! Missed that the several times I looked at that.
On Mon, May 27, 2024 at 4:51 PM Glen Slick wrote:
>
> On Mon, May 27, 2024, 12:56 PM Mike Stein via cctalk
> wrote:
>>
>>
>> (BTW, what's the
>> difference between the 68764 and the 687
There's also the unusual, little known but readily available and
programmable TMS2564 (Vpp also 25V, alas); it (sort of) stayed with
the original ROM/EPROM pinouts when everyone else switched to the
JEDEC standard as more pins became needed.
It's a 28 pin 8K x 8 EPROM, but the upper 24 pins are pi
OS/9 was an incredible operating system for an 8 bit machine. Level 1
was a bit limited. But level II, which could address a megabyte of
memory or more, supported multiple tasks, users and intelligent
peripherals. It supported applications in ROM and RAM and made full use
of all of the advan
i'm sorry but you are misinformed about the HP-41C Calculator.
The HP-41 was the first calculator that had Alpha-Numerics. It could
very well give text descriptions, text prompts and even manipulate
text. It also had a full goto and gosub to alphanumeric labels.
It had a very sophisticated
You see, we are back to my original comment. The definition of Personal
Computer is quite fluid. Does it have to be called a Personal Computer
in advertising literature or does any computer that can be used by a
single person, in any environment, constitute a personal computer.
If i am writi
I'm sorry but I beg to differ with you here. The DEC PDP line of single
user interactive computers (as opposed to batch processing only systems)
started in the late 1950's and early 1960's and spawned many generations
as well as copies and other companies (Data General being the most well
kn
Now that is an interesting refinement. Limiting to 1800 VA, most likely
eliminates almost anything vacuum tube based.
My 1974 PDP-8/E computer alone (not counting external storage devices)
was rated at 115V @ 10A. I don't know what the power factor of it is
but that is 1150 Watts. Does that
I have an old Logical Devices Inc, Gangpro 8 with DIP sockets on it.
What package is this part? Is it compatible with anything more widely
known?
On 5/25/2024 12:23 PM, Glen Slick via cctalk wrote:
On Sat, May 25, 2024 at 6:27 AM emanuel stiebler via cctalk
wrote:
Hi all,
anybody in the US
The problem with this debate is that the definition of Personal Computer
is totally fluid and can be written so that the writers opinion is fact.
Each computer system has contributed, in some way, to those that followed.
If you really want say what is the first "personal" computing machine
tha
When my wife (now my ex-wife) told me during a move that my 2 PDP-8/E
racks were not going to the new apartment because there wasn't room for
her roll top desk and my computer. And told me "they go or you go with
them but they are not moving with us", I should have seen the signs and
gone with
ne language, assembler, report
generator or even high level languages such as Cobol. Yes, there was a
Lunar Lander program!
m
On Sun, May 19, 2024 at 12:30 PM Sellam Abraham via cctalk
wrote:
>
> On Sun, May 19, 2024 at 9:13 AM Mike Stein via cctalk
> wrote:
>
> > What I
In my post about the accounting machine era I forgot to mention that
of course they were all programmable; the mechanical versions used
different length pins, sometimes custom made with a special tool, that
went into a 'magazine' to define the various columns and the
operations to be performed ther
What I find a little sad is that the accounting machine world has been
almost entirely ignored.
The punched card batch processing systems such as IBM's 402/403/407
machines and peripherals are documented and even still in existence here
and there, but the manual entry machines that could once be f
Nicholas Wirth in his paper on Modula-2 about fixing the flaws in Pascal.
In planning Modula-2, I saw it as a new version of Pascal, updated to
the requirements of the time, and I seized the opportunity to correct
various mistakes in Pascal’s design, such as, for example, the syntactic
anomaly
How much extra to turn my deadly lead pipes into gold while you're here?
On Thu, May 9, 2024 at 12:43 PM Sellam Abraham via cctalk <
cctalk@classiccmp.org> wrote:
> On Thu, May 9, 2024 at 8:53 AM Mike Katz via cctalk >
> wrote:
>
> > This is an article on it but
This is an article on it but I still think it's total bunk:
https://www.gcaudio.com/tips-tricks/cd-dvd-demagnetization/
On 5/9/2024 9:04 AM, Antonio Carlini via cctalk wrote:
On 09/05/2024 14:28, Alexander Schreiber via cctalk wrote:
German snake oil wizards to the rescue! The "Atomstromfilter
. Waterloo Pascal on the SuperPetPascal never
really made it on the microcomputer platform did it?
I can't quote numbers, but Borland's Turbo Pascal was quite popular on both
CP/M machines and IBM PC and clones.
Mike Loewen mloe...@cpumagic.scol
There is scientific proof that studying music helps with math aptitude
and vice versa.
On 5/8/2024 9:30 AM, Paul Koning via cctalk wrote:
On May 8, 2024, at 10:25 AM, Harald Arnesen via cctalk
wrote:
Paul Koning via cctalk [07/05/2024 19.31]:
(Then again, I had a classmate who was taking
e of these days
(that one minute on, 30 minute off (officially ;-) duty cycle is a PITA if
you're degaussing a bunch of disks).
On Mon, May 6, 2024 at 9:42 PM Mike Katz via cctalk
wrote:
> I also have one of those from Radio Shack that I have had for more than
> 30 years.
>
> On 5/
I also have one of those from Radio Shack that I have had for more than
30 years.
On 5/6/2024 8:30 PM, Chuck Guzis via cctalk wrote:
On 5/6/24 15:12, Fred Cisin via cctalk wrote:
Radio Shack used to sell a "Bulk Tape Eraser". I gave mine to the college.
Those are on eBay, and even Amazon.
I
I wonder if some intermediary is buying it for a country that cannot
legally purchase something like that from the USA.
I'm not normally a conspiracy guy but why would any normal company pay
half a million dollars for something that could be produced with today's
technology for considerably le
CP/M (Originally Control Program/Monitor later Control Program for
Microcomputers) we developed by Gary Killdall in at Digital Research,
Inc. 1974.
CP/M-86 was released in 1981.
CP/M-68K was released in 1982.
On 5/3/2024 7:11 PM, Norman Jaffe via cctalk wrote:
Not quite.
CP/M is not a ren
On 4/30/2024 4:07 PM, Wayne S via cctalk wrote:
What kind of floppies did Hp recommend to use with this drive?
Sent from my iPhone
On Apr 30, 2024, at 13:55, Fred Cisin via cctalk wrote:
On Tue, 30 Apr 2024, John Herron via cctalk wrote:
Yup, that's all I used to do. Some scotch tape ove
Microsoft loves to take languages developed by others and transmogrify
them into the "Microsoft Universe".
Quick Basic, Visual Java, Visual Basic, Visual C# (barely resembles C)
and the worst offender of all Visual C++ .NET.
Your post reminded me that Postscript is an actual programming langu
I had a similar experience at VCF Midwest where the line voltage was as
low as 90 VAC. My area was without power for about 2 hours during setup.
On 5/2/2024 11:01 AM, Douglas Taylor via cctalk wrote:
I learned at VCF East this year that I should have brought an UPS to
make sure that my vinta
Fred,
It's not a big deal. I was exposed to the DTSS as a 7th grader because
I was going to a boarding school near by in 1972.
The school I was at had a PDP-8/L and I became an early adopter computer
geek.🙂
On 5/1/2024 6:05 PM, Fred Cisin via cctalk wrote:
On Wed, 1 May 2024, Mike
I remember replacing the character generator eprom (the type with the
window for UV erasing) on an old ATI EGA video board so that I could
have the APL character set.
On 5/1/2024 7:14 PM, Fred Cisin via cctalk wrote:
APL was incredible. I was amazed. I was immediately able to do a few
simple
I'm sorry but the original BASIC as run on the Dartmouth Time Sharing
System was compiled.
On 5/1/2024 5:26 PM, Fred Cisin via cctalk wrote:
On Wed, 1 May 2024, Murray McCullough via cctalk wrote:
Nostalgia keeps pressing ahead: It was 60 yrs. ago that BASIC came into
existence. I remember
The Beginners All-purpose Symbolic Instruction Code (BASIC)
Developed by John G. Kemeny and Thomas E. Kurtz at Dartmouth College in
1963. This ran on the Dartmouth Time Sharing System (DTSS) which was an
early time sharing system running on Honeywell and GE Main Frames with
Datanet systems ru
024 at 12:38 AM Paul Berger via cctalk <
cctalk@classiccmp.org> wrote:
> As Mike said there are two models 9114A and 9114B, they are functionally
> equivalent, however the B model uses a 1/2 high drive mechanism and I
> believe there are changes to the controller as well, but I have
I tried formatting multiple times (standard operating procedure). I
don't have a PC with a 3.5" floppy attached any more but I did try bulk
erasing the disk first.
On 4/30/2024 5:21 PM, Just Kant via cctalk wrote:
Format it more then once. That may afford additional stability.
Try formatting
I am not familiar with a 9114 only the 9114A and 9114B.
On 4/30/2024 6:15 PM, Mike Stein wrote:
Just wondering: I see 9114 and 9114A being used interchangeably (mine
are 9114s); are they the same or actually different drives?
m
On Tue, Apr 30, 2024 at 5:39 PM Mike Katz via cctalk
wrote
Yes but hopefully less than $45 for 10 disks.
On 4/30/2024 5:29 PM, Wayne S via cctalk wrote:
Are these the disks you need?
https://www.ebay.com/itm/303254321218?var=0&mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338590836&toolid=10044&customid=bb4f007d293e125433cd664c59b413a4
Sent from my
lotsa 720k diskette’s available for sale… prices vary. Even Amazon
has them!
Sent from my iPhone
On Apr 30, 2024, at 15:39, Mike Katz wrote:
Thank you. I didn't see any new procedures that I have already tried.
I do not have a problem with the drive or with trying to format a HD disk wi
Just wondering: I see 9114 and 9114A being used interchangeably (mine are
9114s); are they the same or actually different drives?
m
On Tue, Apr 30, 2024 at 5:39 PM Mike Katz via cctalk
wrote:
> Thank you for your help.
>
> That is the command I am using on the 41 to try and format
Sent from my iPhone
On Apr 30, 2024, at 14:39, Mike Katz wrote:
Thank you for your help.
That is the command I am using on the 41 to try and format the disk.
With a directory size of 60.
On 4/30/2024 4:22 PM, Wayne S via cctalk wrote:
Also this article refers to a set of commands for
Thank you for your help.
That is the command I am using on the 41 to try and format the disk.
With a directory size of 60.
On 4/30/2024 4:22 PM, Wayne S via cctalk wrote:
Also this article refers to a set of commands for this drive. The NEWM command
formats a new disk.
Link is https://www.h
1.44MB disk and just format it as a 720K disk?
=]
--
Anders Nelson
www.andersknelson.com
On Tue, Apr 30, 2024 at 1:00 PM Mike Katz via cctalk
wrote:
Does anybody have any extra 720K (double sided, double density) 3.5"
Floppy Disks that could use a good home?
If so, please emai
I could probably spare a few disks, but postage from Canada is outrageous;
let me know if no one else comes up with any.
m
On Tue, Apr 30, 2024 at 4:07 PM Mike Katz via cctalk
wrote:
> Thank you for trying to help. My situation is unusual at best and I'm
> apologize for the extra b
Should work; DD and HD are pretty similar, unlike the 5.25 versions. Did
you cover the density hole?
With what are you using that 9114A drive? And where are you located?
I've got a couple of 9114s; I'll have to try HD disks (if I can find the
drives ;-)
m
On Tue, Apr 30, 2024 at 3:
keep the
bandwidth down and take any floppy compatibility discussions off of the
group.
Than you again everyone for offering to help,
Mike
On 4/30/2024 2:41 PM, Wayne S wrote:
What errors are you seeing?
Sent from my iPhone
On Apr 30, 2024, at 12:29, Mike Katz via cctal
I have tried bulk erasing 1.44 MB disks and they still won't format in
the HP9114A battery operated HP-IL Floppy Disk drive.
On 4/30/2024 12:20 PM, Joshua Rice via cctalk wrote:
On 30/04/2024 18:08, Anders Nelson via cctalk wrote:
Having grown up with 1.44MB 3.5" floppies, I have a question:
ixing computers, eh?
John :-#)#
On Tue, Apr 30, 2024 at 1:00 PM Mike Katz via cctalk
wrote:
Does anybody have any extra 720K (double sided, double density) 3.5"
Floppy Disks that could use a good home?
If so, please email me directly at bit...@12bitsbest.com.
Thank you,
Mike
n Tue, Apr 30, 2024 at 1:00 PM Mike Katz via cctalk
wrote:
Does anybody have any extra 720K (double sided, double density) 3.5"
Floppy Disks that could use a good home?
If so, please email me directly at bit...@12bitsbest.com.
Thank you,
Mike
Does anybody have any extra 720K (double sided, double density) 3.5"
Floppy Disks that could use a good home?
If so, please email me directly at bit...@12bitsbest.com.
Thank you,
Mike
I think Ohio Scientific made a computer called the 3B or something like
that that had a 6502, a Z-80 and a 6800 in it. If my memory serves.
On 4/23/2024 7:00 PM, Fred Cisin via cctalk wrote:
On Tue, 23 Apr 2024, Van Snyder via cctalk wrote:
I shared an office with a lady who got a computer fr
Well, it was beyond the PC's and Sparc stations we had access to at the
time.
On 4/22/2024 3:28 PM, Christian Kennedy via cctalk wrote:
On 4/22/24 13:12, Fred Cisin via cctalk wrote:
On Mon, 22 Apr 2024, Mike Katz via cctalk wrote:
[Big snip -- hopefully I managed to get attribution
nning at the speed of a Z-80 or even slower.
On 4/22/2024 2:57 PM, Paul Koning wrote:
On Apr 22, 2024, at 3:45 PM, Mike Katz wrote:
Cycle accurate emulation becomes impossible in the following circumstances:
• Branch prediction and pipelining can cause out of order execution and
Compilers do that with what is called loop rotation optimization.
On 4/22/2024 3:59 PM, Chuck Guzis via cctalk wrote:
On 4/22/24 13:53, Paul Koning via cctalk wrote:
In COMPASS:
MORESA1 A1+B2 (B2 = 2)
SA2 A2+B2
BX6 X1
LX7 X2
SB3
machines were clunky and unreliable but
they worked for the most part.
On 4/22/2024 3:12 PM, Fred Cisin via cctalk wrote:
On Mon, 22 Apr 2024, Mike Katz via cctalk wrote:
Cycle accurate emulation becomes impossible in the following
circumstances:
* Branch prediction and pipelining can cause
Once CPUs became faster than memory the faster the memory the faster the
CPU could run.
That is where CACHE came in. Expensive small high speed ram chips would
be able to feed the CPU faster except in case of a cache miss and then
the cache had to reload from slow memory. That is why multipl
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