[Coco] FDD 26 pin

[Mike Pepe]

Chester A Patterson wrote:
> Retaking the 26 pin Floppy Disk Drives adaptation. The two 720k FDD26
> are set to 0 and 1 and are on a single cable. I made a nice little board
> with a 26 pin connector to a 34 pin connector, with jumpers at the DSO
> 0/1/2 lines on the 34 connector to easily set the two FDD26 as either
> 0/1 or 1/2. It works great. BUT there is a strange behavior. The two
> FDDs have a READY line, which I have left NC. If there is no disk in the
> drive, then no amount of access will make the drive light come on, BUT
> the motors will turn. I suspect it has something to do with the READY
> line, but I am ignorant. The clincher though is that if I have disks in
> both drives, and access D0, D0 light comes on AND, half a second later,
> D1 light comes on as well! However, if I access D1 (with both drives
> with disk) it works normally (only D1 light comes on) I have checked and
> re-checked my wiring and all is well. What could it be? Thanks.
> 

Oh by the way, the correct behavior is that the motors of all drives 
should spin when ANY drive is activated.

If you don't do that, bad things can happen.

-Mike