On Mon, May 06, 2024 at 08:54:53PM -0700, Chuck Guzis via cctalk wrote:
> On 5/6/24 20:25, Fred Cisin via cctalk wrote:
> https://www.ebay.com/itm/134706639303
> >
> > include a basic feature for rewinding rental DVDs before returning them.
> >
> Of course, you need a pure silver AC cable for th
On Monday (05/06/2024 at 06:58PM -0700), 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?
I think you can also f
That would just about break my piggy bank, and it wouldn’t even fit the
connector on the back of the machine. :(
Don Resor
Sent from someone's iPhone
> On May 6, 2024, at 9:33 PM, Chuck Guzis wrote:
>
> On 5/6/24 2116, Don R wrote:
>> Maybe I need one of these power cords for my Monroe-Lit
On 5/6/24 21:16, Don R wrote:
> Maybe I need one of these power cords for my Monroe-Litton 1830 aka
> Compucorp 485. It might make the calculations more precise? ;)
That's the economy version. If you're *really* serious, you'll grab
this one (on sale: 6% off!):
https://www.ebay.com/itm/1160
Maybe I need one of these power cords for my Monroe-Litton 1830 aka Compucorp
485. It might make the calculations more precise? ;)
Don Resor
Sent from someone's iPhone
> On May 6, 2024, at 8:55 PM, Chuck Guzis via cctalk
> wrote:
>
> On 5/6/24 20:25, Fred Cisin via cctalk wrote:
> https
Maybe I need one of these power cords for my Monroe-Litton 1830 aka Compucorp
485. It might make the calculations more precise? ;)
Don Resor
Sent from someone's iPhone
> On May 6, 2024, at 8:55 PM, Chuck Guzis via cctalk
> wrote:
>
> On 5/6/24 20:25, Fred Cisin via cctalk wrote:
> https:
On 5/6/24 20:25, Fred Cisin via cctalk wrote:
https://www.ebay.com/itm/134706639303
>
> include a basic feature for rewinding rental DVDs before returning them.
>
Of course, you need a pure silver AC cable for those:
https://www.ebay.com/itm/115970049389
--Chuck
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 REWINDERS?
On Mon, 6 May 2024, Will Cooke via cctalk wrote:
A must-have acce
cctalk] Re: Double Density 3.5" Floppy Disks
>
> 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 REWINDERS?
> 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 R
Radio Shack sold two models: the original, suitable for cassettes and audio
tapes, and a later, larger and more powerful version for video tapes as
well (44-233A). I keep one of those plugged in beside my desk and still use
it fairly often, but I'm planning to build one of Chuck's one of these days
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 REWINDERS?
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
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've had one of those for years. Resembles a kitchen Mixmaster without
the beaters. The problem is that it has a limited working per
Radio Shack used to sell a "Bulk Tape Eraser". I gave mine to the
college.
Those are on eBay, and even Amazon.
About 25 years ago, Radio Shack/Tandy changed the label and box, and
called it "Bulk Disk Eraser".
The college bought one, and discarded mine.
But, as everyone knows, the one SURE
I wonder if one of the old CRT demagnetizer‘s would work.
Sent from my iPhone
> On May 6, 2024, at 13:30, Bill Gunshannon via cctalk
> wrote:
>
> On 5/6/2024 2:28 PM, Wayne S via cctalk wrote:
> > You do need a very strong magnet. I’ve put 3.5 floppies on top of
> > a mag tape demagnitizer (
On 5/6/2024 2:28 PM, Wayne S via cctalk wrote:
> You do need a very strong magnet. I’ve put 3.5 floppies on top of
> a mag tape demagnitizer ( not technically called that, but you know
> what i mean) and it had no effect at all. I could still read them fine
> in my pc. I surmised that the magnetic
On Mon, May 6, 2024 at 11:59 AM Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> On 5/6/24 11:28, Wayne S via cctalk wrote:
> > You do need a very strong magnet. I’ve put 3.5 floppies on top of a mag
> tape demagnitizer ( not technically called that, but you know what i mean)
> and it had
On 5/6/24 11:28, Wayne S via cctalk wrote:
> You do need a very strong magnet. I’ve put 3.5 floppies on top of a mag tape
> demagnitizer ( not technically called that, but you know what i mean) and it
> had no effect at all. I could still read them fine in my pc. I surmised that
> the magnetic f
You do need a very strong magnet. I’ve put 3.5 floppies on top of a mag tape
demagnitizer ( not technically called that, but you know what i mean) and it
had no effect at all. I could still read them fine in my pc. I surmised that
the magnetic field generated was not strong enough to get through
I have a vague recollection of someone telling me there was a trick to
demagnetizing high density disks. Perhaps wave a magnet in various ways, even
moving the magnet to and from the disk's surface. Then again maybe it's just a
chatgpt style hallucination. Wouldn't hurt to try though.
On Tue, 30 Apr 2024, Mike Katz wrote:
The HP9114A drive uses a modified Sony 3.5" floppy drive running at 600 RPM
instead of the normal 300 RPM. This is an extremely unusual configuration
that is different from any PC/MAC/Commodore/Amiga situation.
I am using normal HD floppies in those 600 R
On Tue, 30 Apr 2024, Mike Katz wrote:
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.
Then I'd guess there is a problem with your drive; write-protect switch?
Christian
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
I can't vouch for later drives, but the earliest 600RPM Sony drives were
built we no knowledge of HD vs DD, so covering the HD hole is probably a
moot point in the HP drives, though it is likely worth taping over it
for any formatting options.
It's worth noting that the speed is pretty much a
On Wed, May 1, 2024 at 5:38 AM Paul Berger via cctalk
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 only
> seen the inside
Well from pictures I found online at
https://www.ebay.com/itm/315148732505 it would seem that the A model
just said "9114" on the front however the serial number label on the
bottom says 9114A.
Paul.
On 2024-05-01 4:39 a.m., Mike Stein via cctalk wrote:
Thanks, Paul,
I'm aware of the 9114A
On Tue, 30 Apr 2024 at 18:08, 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.
In what country? That massively impacts many people's willing
Thanks, Paul,
I'm aware of the 9114A and B versions and some of the differences, but I'm
wondering whether my 9114 is identical to the 9114A.
Is it maybe like World War I which was just 'The Great War' until WW
II came along; same war, different name.
m
On Wed, May 1, 2024 at 12:38 AM Paul Ber
On 01/05/2024 00:27, Mike Katz via cctalk wrote:
Thank you.
My goal is not to use HD floppies on a drive not designed for them. I
saw some on ebay and amazon but I thought I would try here to see if
anybody had some they don't need. I would help keep them out of the
trash.
I have lots, b
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 only
seen the inside of a B model.
Paul.
On 2024-04-30 8:29 p.m., Mike Katz via cctalk
If you look around, there are cheaper ones.
https://www.ebay.com/itm/293053587824?chn=ps&var=591875689002&_trkparms=ispr%3D1&amdata=enc%3A1lR-MWapOQc-w1ymlvIpxOw36&norover=1&mkevt=1&mkrid=711-213727-13078-0&mkcid=2&itemid=591875689002_293053587824&targetid=4580702894586622&device=m&mktype=&googlel
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
Thank you.
My goal is not to use HD floppies on a drive not designed for them. I
saw some on ebay and amazon but I thought I would try here to see if
anybody had some they don't need. I would help keep them out of the trash.
Thank you again.
On 4/30/2024 6:15 PM, Wayne S wrote:
If it’s any
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 the disk.
>
If it’s any help, i second the reformat completely a disk in a old pc. I had
some issues many years ago where disks formatted on an ibm pc didn’t work
correctly on a non- ibm pc. Reformatting and doing the error checking by
reading and writing all sections fixed it. A quick format didn’t.
There
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 with the HP-41 and therefore I was looking for a few DSDD disks
instead of DSHD disks.
On 4/30/2024 5:13 PM, Wayne S wrote:
There is also these 2 pr
Mike,
You can get new and guaranteed recycled 720K diskettes at floppydisk.com.
As you probably already know the drive in the 9114A is known to have
issues with lubricants becoming gummy and the mechanism not operating
properly, one particularly nasty effect is it may result in the upper
head
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 iPhone
On Apr 30, 2024, at 15:22, Just Kant via cctalk wrote:
Format it more then once. That
Format it more then once. That may afford additional stability.
Try formatting it in a pc. Then switch over to the HP.
There is also these 2 procedures to try…. From
https://literature.hpcalc.org/community/hp9114a-ms-en.pdf
TheHP9114Ausesdouble-sideddiscs.Dataiswrittenonboth sides of the disc. Thus the
normal formatting procedure is double- sided formatting. Single-sided
formatting is allowed for transferring
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
Also this article refers to a set of commands for this drive. The NEWM command
formats a new disk.
Link is https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=78
Sent from my iPhone
On Apr 30, 2024, at 14:07, Wayne S wrote:
What kind of floppies did Hp recommend to use with t
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 over the floppy disk hole to
>> make the syst
On Tue, 30 Apr 2024, John Herron via cctalk wrote:
Yup, that's all I used to do. Some scotch tape over the floppy disk hole to
make the system see it as DD. If it didn't automatically format as 720, you
could specify size or sector count with format.com in dos.
Somemedia sensors are optical; us
Thank you for your help. This drive is not a normal drive.
Please see my other answers as to why this is the case.
On 4/30/2024 3:49 PM, Fred Cisin via cctalk wrote:
A 720K 3.5" is about 600 Oersted;
a 1.4M 3.5" is about 720-750 Oersted.
You can format a 1.4M as 720K, and often, maybe even usu
A 720K 3.5" is about 600 Oersted;
a 1.4M 3.5" is about 720-750 Oersted.
You can format a 1.4M as 720K, and often, maybe even usually, get away
with it; it will be just like a poor quality 720K.
On drives with a media sensor, you can cover the hole during formatting.
On Tue, 30 Apr 2024, Anders
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 bandwidth my
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 3:29 PM Mike Ka
Thank you for trying to help. My situation is unusual at best and I'm
apologize for the extra bandwidth my question is causing.
I am formatting the floppies in an HP-9114A battery operated floppy
drive connected to an HP-41 calculator over the HP_IL serial interface.
The HP9114A drive uses a
What errors are you seeing?
Sent from my iPhone
> On Apr 30, 2024, at 12:29, Mike Katz via cctalk wrote:
>
> 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 wrot
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:
Ha! You mean using the transformer's magnetic field to bamboozle the media?
--
Anders Nelson
www.andersknelson.com
On Tue, Apr 30, 2024 at 1:48 PM John Robertson via cctalk <
cctalk@classiccmp.org> wrote:
> On 2024/04/30 10:08 a.m., Anders Nelson via cctalk wrote:
> > Having grown up with 1.44M
Bulk Erasing is the first thing I tried
On 4/30/2024 12:48 PM, John Robertson via cctalk wrote:
On 2024/04/30 10:08 a.m., Anders Nelson via cctalk wrote:
Having grown up with 1.44MB 3.5" floppies, I have a question: is it
possible to use a 1.44MB disk and just format it as a 720K disk?
=]
--
A
No, this is for use in an HJP9114A HP-IL Floppy Drive.
On 4/30/2024 12:08 PM, Anders Nelson via cctalk wrote:
Having grown up with 1.44MB 3.5" floppies, I have a question: is it
possible to use a 1.44MB disk and just format it as a 720K disk?
=]
--
Anders Nelson
www.andersknelson.com
On Tue,
On Tue, Apr 30, 2024, 12:48 PM John Robertson via cctalk <
cctalk@classiccmp.org> wrote:
> On 2024/04/30 10:08 a.m., Anders Nelson via cctalk wrote:
> > is it
> > possible to use a 1.44MB disk and just format it as a 720K disk
>
(Snip)
> you could
> format it as 720 - covering the 1.44 hole
>
On 2024/04/30 10:08 a.m., Anders Nelson via cctalk wrote:
Having grown up with 1.44MB 3.5" floppies, I have a question: is it
possible to use a 1.44MB disk and just format it as a 720K disk?
=]
--
Anders Nelson
www.andersknelson.com
As I recall you had to bulk erase the old diskette and then y
On 30/04/2024 18:08, Anders Nelson via cctalk wrote:
Having grown up with 1.44MB 3.5" floppies, I have a question: is it
possible to use a 1.44MB disk and just format it as a 720K disk?
I think it's entirely possible. I'd definitely format them in a 720kb
drive though to be extra safe. Though
Having grown up with 1.44MB 3.5" floppies, I have a question: is it
possible to use a 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 de
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