On Thu, 1 Sep 2022, jim stephens wrote:
I've never heard of anyone making 8" Flippy Diskettes.
BASF had the FlexyDisk 2N. They are intented for single-sided drives and
can be flipped. They have two index hole cutouts.
Christian
On Sun, 4 Sep 2022, dwight via cctalk wrote:
When punching holes in the envelope I've always had a piece of thin cardboard
between the back of the punch and the disk. I've never had a problem this way.
I damaged a disk once with the punch and the lesson was learned.
You just cut the cardboard
, between
the disk and the envelope.
Dwight
From: Mike Stein via cctalk
Sent: Thursday, September 1, 2022 7:39 AM
To: General Discussion: On-Topic and Off-Topic Posts
Cc: Mike Stein
Subject: [cctalk] Re: Flipping an 8" diskette
Flipping disks to use both
Flipping disks to use both sides in a single-side drive was really only
feasible in Commodore and similar drives that did not rely on an index hole
for locating the data on the disk; the notch was to allow writing to the
disk and had to be added on the opposite edge.
To use a flipped 5 1/4" disk
On Thu, 1 Sep 2022, David Barto via cctalk wrote:
If you have a SS/SD drive then yes, punching a notch in the sleeve
would allow you to flip the disk over and use the other side. I’ve done
this in the (very) distant past.
Most drives these days are DS and can R/W the SD disks without
issue, so I
For a flippy 8” disk you don’t need to punch a notch as the write control is
opposite of the 5.25. No notch is read-write. You will need to punch a new
index hole in both sides of the jacket though.
Pete
> On Sep 1, 2022, at 4:10 AM, Liam Proven via cctalk
> wrote:
>
> Someone on Fesse
> On Sep 1, 2022, at 4:10 AM, jim stephens via cctalk
> wrote:
>
>
>
> On 8/31/22 13:33, Liam Proven via cctalk wrote:
>> Someone on Fesse Bouc just found a sealed box of SS/SD 8" floppies in
>> their garage.
>>
>> Most FB types are too young to know 8" disks existed, of course.
>>
>>
On Thu, 1 Sept 2022 at 16:36, Chris Zach via cctalk
wrote:
>
> Are they IBM preformatted? If so they could work in someone's RX01/RX02.
Doesn't say so on the box.
Thanks for all the info and clarification, folks!
--
Liam Proven ~ Profile: https://about.me/liamproven
Email: lpro...@cix.co.uk ~
-- Original Message --
From: "Fred Cisin via cctalk"
To: "Chuck Guzis via cctalk"
Cc: "Fred Cisin"
Sent: Friday, 2 Sep, 2022 At 01:45
Subject: [cctalk] Re: Flipping an 8" diskette
Didn't HP continue to say "disc"?
MOST switched to &qu
How do they handle the issue of how the drive knows whether it is SS, DS,
or SS flippy? Or is it assumed that that problem is for the host FDC?
(some DS drives had both SS and DS index sensors, so that they could read
SS in the DS drive, and such a drive is going to see TWO index pulses with
On Thu, Sep 1, 2022 at 5:45 PM Fred Cisin via cctalk
wrote:
>
> How do they handle the issue of how the drive knows whether it is SS, DS,
> or SS flippy? Or is it assumed that that problem is for the host FDC?
> (some DS drives had both SS and DS index sensors, so that they could read
> SS in
On 9/1/22 19:22, Fred Cisin via cctalk wrote:
> But, how about a WD TRACK READ with the index pulse masked?
Well, okay, but I never found that to be very useful, because to achieve
correct byte alignment, you need one of the standard address marks to
get the data separator working right, which
> It turns out that some 8" drives can be set to separate the sector holes
> from the index hole (separate output pins for index and sector). Doing
> so, gives you what amounts to a soft-sectored floppy, regardless of what
> the physical object is.
The flippy 8" diskette I linked a picture of
On 9/1/22 18:43, Mike Katz wrote:
Taking my memory back to the early 1980's and the Western Digital floppy
disk controller chip family (177X single density and 179X double
density). I wrote the 6809 drivers for Gimix Flex. The controller chip
used the index pulse for sector zero position and
On 9/1/22 18:43, Mike Katz wrote:
> Taking my memory back to the early 1980's and the Western Digital floppy
> disk controller chip family (177X single density and 179X double
> density). I wrote the 6809 drivers for Gimix Flex. The controller chip
> used the index pulse for sector zero position
On 9/1/22 17:45, Fred Cisin via cctalk wrote:
> How do they handle the issue of how the drive knows whether it is SS,
> DS, or SS flippy? Or is it assumed that that problem is for the host FDC?
> (some DS drives had both SS and DS index sensors, so that they could
> read SS in the DS drive, and
On Thu, 1 Sep 2022, Chuck Guzis via cctalk wrote:
I'm sitting here with a customer's 8" floppy in front of me. The
manufacturer's label is simply "Diskette" on both front and back with
the usual "Diskette No." legend and "Side 1" or "Side 2" respectively.
The curious thing is that this disk is
I'm sitting here with a customer's 8" floppy in front of me. The
manufacturer's label is simply "Diskette" on both front and back with
the usual "Diskette No." legend and "Side 1" or "Side 2" respectively.
The curious thing is that this disk is not only a "flippy", but has a
*third* index
On Thu, 1 Sep 2022, Sellam Abraham via cctalk wrote:
This is because, like Apple ][ drives, they used GCR encoding and looked
for sync bytes on the disk rather than implementing additional hardware to
look for the index hole.
Sellam
Well, it's not really just the GCR that does that.
On the
Sad day when AOL changed to CDs and you then had to make
coasters or trash them.
On Thu, 1 Sep 2022, Alan Frisbie via cctalk wrote:
My wife and our neighbor use them as reflectors to scare birds away from
her garden. We finally ran out of the AOL CDs and are now working on my
backlog of MSDN
On Wed, 31 Aug 2022, Liam Proven via cctalk wrote:
Someone on Fesse Bouc just found a sealed box of SS/SD 8" floppies in
their garage.
Most FB types are too young to know 8" disks existed, of course.
About 3 decades ago, my assistant (Bob Fink) came up with an advertising
campaign for
On Wed, 31 Aug 2022, Liam Proven via cctalk wrote:
Someone on Fesse Bouc just found a sealed box of SS/SD 8" floppies in
their garage.
Most FB types are too young to know 8" disks existed, of course.
Someone suggested punching a notch in them and using both sides.
Was that even possible on 8"
This is because, like Apple ][ drives, they used GCR encoding and looked
for sync bytes on the disk rather than implementing additional hardware to
look for the index hole.
Sellam
On Thu, Sep 1, 2022 at 10:08 AM geneb via cctalk
wrote:
> On Thu, 1 Sep 2022, Pete Turnbull via cctalk wrote:
>
>
Here's a photo of a stock Memorex 8" "flippy".
Un-modified--this is the way they were sold.
--Chuck
https://i.imgur.com/3VnrazS.jpg
And commodore 154x drives.
On September 1, 2022 12:39:02 PM EDT, Pete Turnbull via cctalk
wrote:
>On 01/09/2022 14:31, Kenneth Gober via cctalk wrote:
>> On 5.25" diskettes punching a notch to enable use of the second side
>> worked due to 2 factors:
>>
>> First, the index hole was commonly
On Thu, 1 Sep 2022, Pete Turnbull via cctalk wrote:
On 01/09/2022 14:31, Kenneth Gober via cctalk wrote:
On 5.25" diskettes punching a notch to enable use of the second side
worked due to 2 factors:
First, the index hole was commonly unused on 5.25" systems so it
didn't matter that the index
On Thu, Sep 01, 2022 at 08:20:21AM -0500, Mike Katz wrote:
> I've never heard of anyone making 8" Flippy Diskettes.
>
I did it in high school. Poor job with a hand punch but worked. I also have a
box of 3M disks that are officially flippy. They came punched to be able to
use both sides. Label
On 01/09/2022 14:31, Kenneth Gober via cctalk wrote:
On 5.25" diskettes punching a notch to enable use of the second side
worked due to 2 factors:
First, the index hole was commonly unused on 5.25" systems so it
didn't matter that the index hole was in the wrong place when the
diskette was
On 8/31/22 13:33, Liam Proven via cctalk wrote:
> Someone on Fesse Bouc just found a sealed box of SS/SD 8" floppies in
> their garage.
>
> Most FB types are too young to know 8" disks existed, of course.
>
> Someone suggested punching a notch in them and using both sides.
>
> Was that even
jim stephens wrote:
> Sad day when AOL changed to CDs and you then had to make
> coasters or trash them.
My wife and our neighbor use them as reflectors to scare birds away from
her garden. We finally ran out of the AOL CDs and are now working on my
backlog of MSDN CDs. I keep them stacked
> BTW, the greaseweazle can format RX01 format diskettes quite nicely.
Any PC that can do single-density can (with ImageDisk or similar), as well as
basically all CP/M boxes with 8" drives. That's how I format new RX01 media.
RX01 can of course be up-converted to RX02 format with XXDP.
Thanks,
I just happen to have 2 RX02's hungry for diskettes
BTW, the greaseweazle can format RX01 format diskettes quite nicely.
On 9/1/2022 9:36 AM, Chris Zach via cctalk wrote:
Are they IBM preformatted? If so they could work in someone's RX01/RX02.
C
On 9/1/2022 7:10 AM, jim stephens via cctalk
Are they IBM preformatted? If so they could work in someone's RX01/RX02.
C
On 9/1/2022 7:10 AM, jim stephens via cctalk wrote:
On 8/31/22 13:33, Liam Proven via cctalk wrote:
Someone on Fesse Bouc just found a sealed box of SS/SD 8" floppies in
their garage.
Most FB types are too young to
On Thu, Sep 1, 2022 at 4:10 AM Liam Proven via cctalk
wrote:
> Someone on Fesse Bouc just found a sealed box of SS/SD 8" floppies in
> their garage.
>
> Someone suggested punching a notch in them and using both sides.
>
> Was that even possible on 8" disks?
>
On 5.25" diskettes punching a notch
> Someone suggested punching a notch in them and using both sides.
> Was that even possible on 8" disks?
Sure, but you have to punch an offset index hole:
https://imgur.com/a/6vdR6NE
That's a single-sided flippy 8" diskette (it's also hard-sector but that's not
really relevant). 8" diskettes
I've never heard of anyone making 8" Flippy Diskettes.
There were many "notchers" to make flippy 5 1/4" diskettes and even a
drive or two that were designed to "flip" the disk.
The problem with "flipping" as diskette is that both the write protect
notch AND the index/sector hole had to be
On 8/31/22 13:33, Liam Proven via cctalk wrote:
Someone on Fesse Bouc just found a sealed box of SS/SD 8" floppies in
their garage.
Most FB types are too young to know 8" disks existed, of course.
Someone suggested punching a notch in them and using both sides.
Was that even possible on 8"
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