[Coco] 1.2Mb floppy drives

[Kip Koon]

Hi Gene,
Do you know where the documentation for this jumper is located.  I'm very willing to try it on one of my 1.2MB floppy drives if I can locate the instructions.  I remember seeing a youtube video on this once.  I'll have to go look that up again and see how detailed it was.

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/User:Computerdoc


-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Gene Heskett
Sent: Tuesday, March 07, 2017 2:07 PM
To: coco at maltedmedia.com
Subject: Re: [Coco] 1.2Mb floppy drives

On Tuesday 07 March 2017 10:29:01 Bill wrote:

> Has anyone figured how to use 1.2Mb floppy drives with the Coco 
> (EITHER NitrOS-9 or RSDos).
>
Someplace on the board on 90% of those is a poorly labeled jumper, that converts the 360 rpm disk motor to a 300 rpm like the rest of our drives. And at our 250 kilobaud data rate, they make great 720k drives but do need the harder magnetically HD disks to work well over an extended time frame for storage in your disk vault. I did some testing back then and found the softer disks were more prone to data errors 6 months later. This is the opposite effect of using a 3.5 HD disk in the DD drives by taping over the HD hole.  That turns the recording drive down, and 6 months later you may have a pretty good imitation of a blank disk.

> Since 180Kb and 360Kb are getting as scarce as hen’s teeth, I need 
> SOME kind of 5 ¼” drive, or I have 578 5 ¼” coasters.
>
> Thanks

Floppydisk.com is still alive and well but apparently out of 5.25" disks, but 60 bucks will get you 50 brand new 3.5" DS/DD diskettes. Scroll down to near the bottom of the page.

Cheers, Gene Heskett
--
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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