Date   : Thu, 21 Feb 1991 08:52:14 GMT
From   : eru!hagbard!sunic!news.funet.fi!fuug!mjolner!newshost!fekete@bloom-beacon.mit.edu (Zoltan Fekete)
Subject: Motor on and Drive Select

In article <1991Feb19.133929.568@iowasp.physics.uiowa.edu> syswtr@iowasp.physics.uiowa.edu
writes:
>   Most of the floppy varieties I have seen are jumperable to allow the
>   MOTOR-ON signal to control the motor without also using DS.  That is,
>   MOTOR-ON turns ALL motors on.  This should eliminate any problems
>   with motor spin-up delays when moving from drive-to-drive.
---more text is deleted----

Sorry, you've probably missed the article which made me to write my one. I
have also the experience, that you can always jumper a drive so, that it 
controls the motor only by Motor On. (But still most of them are not spinning
if no disk is inserted. But this is now out of our interest, I think.) The 
problem comes if you don't have signal to drive Motor On. Then you can 
set the drive to control the motor by DS, but that in my opinion is dangerous,
as I wrote it in my previous article. My ideas came for that case.
I'm sorry if you just simply misunderstood me, quite probable that I wasn't
clear enough.

Zoltan
fekete@tnds05.tele.nokia.fi
Voice: +358 0 5116293