Pinout for SED9421

[Chuck Guzis]

On 11/28/2005 at 11:58 AM Dwight K. Elvey wrote:

> I suspect that one could do a controller to controller
>method but one would need to generate the index pulses.
>A simple 555 circuit would most likely be enough.
> You might need to add a little analog filtering to
>match up the compensation that is usually added to the
>write data on the higher density drives.

If we're talking about 765-type controllers, one would need more than
that--a 765 will not start reading or writing until an IDAM has been read
and checked, and in the case of a read, the DAM seen.  Both of which are
provided not by writing, but by formatting.  So one would need some extra
logic to generate said info to keep both sides happy.

One instance where a "smart" (sic) floppy controller gets in the way.

Cheers,
Chuck