From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Chuck Guzis via
cctalk <cctalk@classiccmp.org>
Sent: Friday, July 21, 2017 1:16:54 PM
To: cctalk
Subject: Re: Diskette size
On 07/21/2017 12:19 PM, Paul Koning wrote:
> Interesting. Another example, slightly later, is
some think it was a disaster, but that is another discussion :-)
Tom
-Original Message-
From: Chuck Guzis [mailto:ccl...@sydex.com]
Sent: Thursday, July 20, 2017 11:47 PM
To: Steve Malikoff via cctalk
Subject: Re: Diskette size
On 07/20/2017 10:42 PM, Steve Malikoff via cctalk wrote:
&
On 07/21/2017 12:19 PM, Paul Koning wrote:
> Interesting. Another example, slightly later, is the audio unit of the PLATO
> IV terminal (1974 or thereabouts). It uses a rather large disk, perhaps 10
> inches diameter, brown oxide, no grooves. It's a random access device, with
> 128 tracks.
On Fri, 21 Jul 2017, Paul Koning via cctalk wrote:
Interesting. Another example, slightly later, is the audio unit of the
PLATO IV terminal (1974 or thereabouts). It uses a rather large disk,
perhaps 10 inches diameter, brown oxide, no grooves. It's a random
access device, with 128 tracks.
> On Jul 21, 2017, at 2:30 PM, Chuck Guzis via cctalk
> wrote:
>
> On 07/21/2017 10:37 AM, Adrian Graham via cctalk wrote:
>
>> I have a Facit9911 2 11/16” (or 70mm in new money) microfloppy drive with a
>> mahoosive interface module which google turns up precisely
On Fri, 21 Jul 2017, Sam O'nella wrote:
Extremely interesting Fred. I hadn't heard of half of those experimental
disk sizes. ??Are those stories from your experience or from that
article? (Yes I'll rtfm shortly).
Definitely my experiences and presence in the business at the time, NOT
from
On Fri, Jul 21, 2017 at 7:30 PM, Chuck Guzis via cctalk
wrote:
> Even before flexible magnetic disks were used to record digital
> information, they found use in audio equipment. E.g. the Telefunken DT-600:
>
> http://vintage-technics.ru/Eng-Telefunken_600.htm
Off-topic,
On 07/21/2017 10:37 AM, Adrian Graham via cctalk wrote:
> I have a Facit9911 2 11/16” (or 70mm in new money) microfloppy drive with a
> mahoosive interface module which google turns up precisely nothing about. I’m
> pretty sure I’ve mentioned it here before but even a search of the archive
>
> On 21 Jul 2017, at 11:46, Liam Proven via cctalk
> wrote:
>
> I was aware of Twiggy disks, Hitachi 3" as used in Amstrad and Tatung,
> and of one that I think Fred _didn't_ mention: the 2" 720 kB diskettes
> used in the Zenith Minisport:
>
>
On 21 July 2017 at 07:03, Sam O'nella via cctalk wrote:
> Extremely interesting Fred. I hadn't heard of half of those experimental disk
> sizes. Are those stories from your experience or from that article? (Yes
> I'll rtfm shortly).
> The only odd one i have is a backup
On 07/20/2017 10:42 PM, Steve Malikoff via cctalk wrote:
> Eric said:
>> I think Shugart settled on 5.25" for the size of a minifloppy at least a
>> year, and more likely two years, before Steve Jobs would have visited. I
>> don't have proof, but SA400 public intro was in 1976, and they probably
Eric said:
> I think Shugart settled on 5.25" for the size of a minifloppy at least a
> year, and more likely two years, before Steve Jobs would have visited. I
> don't have proof, but SA400 public intro was in 1976, and they probably
> took more than a year of development to get to that point.
Extremely interesting Fred. I hadn't heard of half of those experimental disk
sizes. Are those stories from your experience or from that article? (Yes I'll
rtfm shortly).
The only odd one i have is a backup cartridge? that resembles around a 3.5" but
is in fact closer to the mythical 12"
On Jul 19, 2017 10:15 AM, "Fred Cisin via cctalk"
wrote:
> That Steve Jobs was pestering them for a cheap drive, but due to the
holes in his jeans and personal hygiene?, they never took him seriously.
I think Shugart settled on 5.25" for the size of a minifloppy at least a
"That is why they switched from 8 foot to 5.25 foot floppies."
LOL
On Wed, Jul 19, 2017 at 12:15 PM Fred Cisin via cctalk <
cctalk@classiccmp.org> wrote:
> >> Did any one ever use keypunch to tape or 8' floppy?
> On Wed, 19 Jul 2017, Mike Stein via cctalk wrote:
> > Those 8' floppies were a
Did any one ever use keypunch to tape or 8' floppy?
On Wed, 19 Jul 2017, Mike Stein via cctalk wrote:
Those 8' floppies were a PITA to handle and store, but
they sure held a lot of data...
;-P
That is why they switched from 8 foot to 5.25 foot floppies.
Punchcard size is reputed to have
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