[Coco] PC-to-CoCo floppy drive cable

[Bruce W. Calkins]

Drive 0,1 and 2 are the same.  Drive 3 uses the "unused" side select line, 
which is what makes it possable to use both sides of up to 3 drives.  4 
single sides at a time under Disk Extended Basic and full support of three 
double sided drives under OS-9/NitrOS9.

All that is on the controller end, if you are using a normal PC cable.  I 
have not disassembled my only Radio Shack original four drive cable to see 
how they moved the signal from the side select to the drive 3 line.

Bruce W.



> At 01:55 PM 11/12/2008, you wrote:
>>Here's the first 4 hits I gtet from Google.
>>
>>http://www.interfacebus.com/PC_Floppy_Drive_PinOut.html
>>
>>http://pinouts.ru/Storage/InternalDisk_pinout.shtml
>>
>>http://pinouts.ru/Storage/InternalDisk_pinout.shtml
>>
>>http://pinouts.ru/Storage/InternalDisk_pinout.shtml
>
>
> Those are PC pinouts.  I was looking for the CoCo pinouts.  The CoCo cable 
> signals are slightly different, mainly the drive and side select lines, as 
> far as I remember.
>
> -- 
> Roger Taylor
>
> http://www.wordofthedayonline.com
>
>
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