14 Jun
2005
14 Jun
'05
11:04 a.m.
From: "Dwight K. Elvey" <dwight.elvey at amd.com>
Sent: Tuesday, June 14, 2005 11:32 AM
This issue only affects 3.5" drives which no longer use the same termination
(but is compatible with).
I'll have to look up the technical details (hopefully someone will speak up
first) but basically the floppy drivers on PC's have gone from open
collector TTL to CMOS changing the characteristics of the line drivers.
I am not sure about details like maximum cable length etc. but 3.5" drives
can be mixed with TTL driven drives and termination then becomes optional.
The 3.5" drivers pull up the lines enough to make termination unnecessary,
of course you still don't want two TTL type drives terminated on the same
cable.
Randy
www.s100-manuals.com
From:
"Randy McLaughlin" <cctalk at randy482.com>
When replacing drives in classic systems there are some things to keep in
mind:
Newer drives are mainly compatible but not 100%.
Hi
Termination is another thing that many miss. Too much
is often just as bad as too little. Many newer drives
are not clear how to disable the termination or enable
it.
Dwight