🚀 go-pugleaf

/* Written 11:01 am  Jan 16, 1990 by marlin.UUCP!farris in adaptex:comp.sy.ibm.pc */
/* ---------- "JUMPERS ON TANDON T65 FLOPPY DRIVE" ---------- */

=Can anyone tell me the jumper settings required to make a Tandon
M=odel T65 floppy drive work on my XT clone?  The drive is brand
=new and the dealer assures me it is good, but it won't work as
=either "A" or "B" with any of the jumper settings I have tried.
=It will occasionally read the directory, but it will not read or
=write and I get lots of "not ready," "general failure," and
="sector not found" errors.  Thanks,

=Russ Farris        (farris@marlin.nosc.mil)   (619)553-4129
=Code 444      
=Naval Ocean Systems Center
=San Diego, CA 92152-5000 
=/* End of text from adaptex:comp.sy.ibm.pc */

Russ,
It sounds like you do not have a terminator on the drive. This is either 
by a chip-style terminator that goes into what appears to be an unsued socket
on the board or by a jumper that is marked with a "T". Look at the drive
circuit board for either of these items. If you have an open socket give
the dealer a call. 

You can usually get away without a terminator on a single drive system,
but it's not a good thing to rely upon. You need one to balance the
interface signals so they are reliable. If you have a two drive system
the terminator >must< be in the drive at the far end of the cable. Also you 
can only have one terminator active on any single cable chain, so if you 
have a two drive system you can only have a terminator on the drive at 
the end of the chain. This applies to hard drives as well.

Skip Lutz