MFM/RLL data recovery

[Randy McLaughlin]

From: "Bill Allen Jr" <n8uhn at yahoo.com>
Sent: Wednesday, April 06, 2005 2:36 AM
> Hmm,
>
> He states "i am useing a floppy cable with a twist in
> it and a 20 pin data cable."
>
> hard drives did not use a twisted cable on them.
>
> the used a 34 pin (data) and a 20 pin(control)
> streight thru cable(s.
>
> Bill

No IBM included a twist in their 34 pin hard drive cables, it was different 
than the floppy twist.

Most clone manufacturers didn't bother with the hard drive cable twist.

On the hard drive cable the twist merely changed the drive select signals, 
on the floppy drive cable both the drive select and motor on gets twisted. 
The floppy drive cable must be twisted to have drive A work properly the 
hard drive can work with or without a twist.


Randy
www.s100-manuals.com