8" drive support on PC's

[Randy McLaughlin]

From: "Dwight K. Elvey" <dwight.elvey at amd.com>
Sent: Thursday, March 17, 2005 5:51 PM
>>From: "Randy McLaughlin" <cctalk at randy482.com>
> ---snip---
>>
>>Today density select is a general purpose IO pin, originally the 765 used
>>the direction pin as a dual purpose pin.
>>
>>This dual purpose description is now gone but maybe not the action.
>>
>>There is no need for TG43 in todays PC's, at least not as far as the
>>manufacturers are concerned.  When the need for a "new" density select
>>line
>>came it was accomplished through a separate IO but was the old reduced
>>current logic removed?
>>
>
> Hi Randy
> That is a good question? I would guess that it went the
> way of the FM ability. When they were looking for things
> to cut, a magnitude comparitor would have sticked out
> like a sore thumb.
> Dwight

I'm going to write some code that reads sectors at specific tracks.  By 
monitoring pin 18 it will be easy to tell if it is still there.

It may be that as you said it went the way of FM support, if so it would be 
OK as long as it wasn't removed well be FM support was removed :-)  After 
all some still support FM maybe they still have a hidden TG43 support.


Randy
www.s100-manuals.com