8 inch floppies

Bill Gunshannon bill.gunshannon at hotmail.com
Fri Dec 13 20:06:52 CST 2019

On 12/13/19 8:22 PM, Chuck Guzis via cctalk wrote:
> On 12/13/19 5:11 PM, Bill Gunshannon via cctalk wrote:
>> I never saw any flippies commercially made but many
>> companies made punches for flippy 5.25" disks.  I always
>> had to make my own for 8".
> They were standard products.  Let's see if I can find a period ad...
> Well, not an ad, but a precise description:
> http://bitsavers.org/pdf/3M/3M_Diskette_Reference_Manual_May83.pdf
> Page 8, top illustration.  3M added an "R" to the stock number for
> "reversible".  I have a few in my stash.

Must have been targeted at the home market as I don't
remember ever seeing them in any of the supplies catalogs
I dealt with.  And there were numerous white papers
talking about why it was a really bad idea to spin
floppies in both directions.


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