[Coco] 5 1/4" drive

[Gene Heskett]

On Tuesday 07 April 2009, Darren A wrote:
>On 4/7/09, Gene Heskett wrote:
>> I have never, and I've dealt with a lot of oddball storage media over the
>> years I've been a broadcast engineer, heard of a 300 kilobaud data rate
>> being
>> used, in anything.
>
>----
>
>A data rate of 300 kbps at 360 rpm is equivalent to 250 kbps at 300 rpm.
>
>Standard PC controllers support that data rate. My CoCoDisk utility for
>Windows will read a standard double density CoCo diskette in a drive that is
>spinning at 360 rpm.  It times the interval between index hole pulses to see
>how fast the motor is spinning.  If it detects 360 rpm then it sets the
>controller's bit rate to 300 kbps (and double steps the head for each
>track). It works quite well.
>
>Darren
>
Ok, I wasn't aware of that, never having encountered a problem that required 
that sort of research to fix.  This I take it was using the upd-765 controller 
that seemed to be in every pc?

If only I could find the file on Dunfields site that started all this.

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-- 
Cheers, Gene
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