1 Nov
2021
1 Nov
'21
8:38 a.m.
I'm not as familiar with 8" drives but in the 5.25" drives there were
small punches you could buy that were designed to punch an additional
index hole so single sided floppies could be used as flippies.
I think it was Wangco that made a single sided drive that had dual write
protect and dual index sensors so that you just turn the disk over
rather than punching a hole.
There were also some problems spinning cheaper floppies in the "wrong"
direction when they were flipped.
On 11/1/2021 10:24 AM, mike via cctalk wrote:
I use a few Shugart 8" single sided drives on my
cp/m 2.2 machine. How do
you make 'flippies'?
Mike Zahorik
(414) 254-6768
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Chuck Guzis
via cctalk
Sent: Monday, November 01, 2021 12:34 AM
To: Ali via cctalk
Subject: Re: 8" disk drive questions...
On 10/31/21 10:07 PM, Ali via cctalk wrote:
"Computers that used the floppy index hole
also required two additional
openings in the floppy case to allow the drive to access when the disk was
upside down. However, it was a difficult and risky operation for the
integrity of the support. To facilitate this intervention, there were
"guide
masks" which allowed to accurately trace the
position where the hole was
to
be made. These tools included the "Berkeley
Microcomputer Flip-Jig" which
was available for both 8 "and 5" 1/4 discs."
Interesting. When I
was using 8" disks early on, the only ones
available were single-sided. However, several manufacturers produced
"flippies' with labels on both sides. I still have several such
examples in my stash.
You'd think that a simple cardboard template would serve to allow users
to mark additional hole locations, however.
--Chuck