Need SA400 help - test-drb@ccmp.vtda.org

28 Oct 2002

...
 From: "Fred Cisin (XenoSoft)"
&lt;cisin(a)xenosoft.com&gt;

On Fri, 25 Oct 2002, Glen Goodwin wrote:
  Can anyone help me with settings on this drive?
 Specifically, drive select, termination, and pinouts on the power connector
 (J2) would help. 
Same as the other 5.25" drives.  That's why they are called "SA400
interface".  Such as drive selects on pins 10, 12, 14, . . . 

But some newer drives have added SIDE SELECT (for double sided drives),
and "density" for multi-media drives, such as 1.2M.

Termination is required on the last drive on the cable.  Lack of proper
termination can make for flaky operation, but will not generally 
prevent it from working. 
Hi
 One should note that double termination can also cause flaky
operation as well. I've seen it twice now that I have a machine
that has a flaky disk and I open it up and see a terminator
on both drives. Removing one brings back normal operation.
One of the machines was a KayPro and the other was my Olivetti
M20. I suspect that these were that way from the beginning since
both normally ship as dual drive machines.
Dwight

...

Power connection isthe same as all other (well, ALMOST all) 5.25" drives.

The SA400 is a 48TPI, 35 track drive.  Most drives that replaced it added
another 5 tracks.

  Also, the specimen I have has a power switch on
the front which appears to
 be factory-installed.  Is this common for this drive?  The photos I found
 on the 'net don't have a switch . . . 
I've never seen a factory switch on the front of one.   Are you sure that
that wasn't a user added switch, such as one to override the write-protect
for flippies?

--
Fred Cisin                      cisin(a)xenosoft.com
XenoSoft                        http://www.xenosoft.com