Re: Diskette size

2017-07-23 Thread dwight via cctalk
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

RE: 5.24-inch FDD invention [was RE: Diskette size]

2017-07-21 Thread Tom Gardner via cctalk
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: &

Re: Diskette size

2017-07-21 Thread Chuck Guzis via cctalk
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.

Re: Diskette size

2017-07-21 Thread Fred Cisin via cctalk
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.

Re: Diskette size

2017-07-21 Thread Paul Koning via cctalk
> 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

Re: Diskette size (was: Repurposed Art (ahem...)

2017-07-21 Thread Fred Cisin via cctalk
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

Re: Diskette size

2017-07-21 Thread Tony Duell via cctalk
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,

Re: Diskette size

2017-07-21 Thread Chuck Guzis via cctalk
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 >

Re: Diskette size (was: Repurposed Art (ahem...)

2017-07-21 Thread Adrian Graham via cctalk
> 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: > >

Re: Diskette size (was: Repurposed Art (ahem...)

2017-07-21 Thread Liam Proven via cctalk
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

Re: Diskette size

2017-07-21 Thread Chuck Guzis via cctalk
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

Re: Diskette size (was: Repurposed Art (ahem...)

2017-07-20 Thread Steve Malikoff via cctalk
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.

Re: Diskette size (was: Repurposed Art (ahem...)

2017-07-20 Thread Sam O'nella via cctalk
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"

Re: Diskette size (was: Repurposed Art (ahem...)

2017-07-20 Thread Eric Smith via cctalk
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

Re: Diskette size (was: Repurposed Art (ahem...)

2017-07-19 Thread Anders Nelson via cctalk
"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

Diskette size (was: Repurposed Art (ahem...)

2017-07-19 Thread Fred Cisin via cctalk
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