Creating new CP/M disks - Progress on IMSAI - test-drb@ccmp.vtda.org

12 Jan 2008

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Subject: Re: Creating new CP/M disks - Progress on IMSAI
   From: "Alexandre Souza" <alexandre-listas at e-secure.com.br>
   Date: Sat, 12 Jan 2008 09:22:38 -0300
     To: "General Discussion: On-Topic Posts Only" <cctech at
classiccmp.org>

>    I?m looking for some advice/whatever on engaging the motor when needed. 
Forst if you running motor only when needed you need a delay in software 
for the motor to come up to speed (1 sec does it).

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     How is DS0 line activated? As far as I know the
sequence should be:

    - Activate DS0, motor starts to run
    - Activate "head load" so the heads can do their job
    - Read/write

    Since your motor is always on, seems that you have DS0 activated 
permanently. Isn't something wired wrong? 
It's possible the connector is upside down.  The other is the drive in 
use has a jumper for motor always on.

Also DS0 (thats a zero right?) needs to be selected to read or write 
to the the zeroth drive.

Allison