27 Sep
2010
27 Sep
'10
8:46 p.m.
On 27 Sep 2010 at 21:01, Tony Duell wrote:
I think the problem is that many modern motherboards
don't have the
pins of the second drive select and MotorOn signal wired up. Whether
the signals exist on accessible pins of an I/O chip I don't know (if
they do, it may be possible to add jumper wires, but some people are
afraid of soldering to motherboards).
In most modern motherboards,the FDC is tucked into a corner of the
Southbridge chip (or on the combo south/north chip) and the signals
for only one floppy are materialized. I've seen this on a lot of not-
so-modern Pentium 3 booards, so it's not a new trend.
What was the Intel(?) chipset that could be configured to support an
additional floppy on the parallel port? I recall being a little
surprised to see that, but now I don't recall the specifics.
There's also at least one chipset that allows for an additional drive
by decoding the motor and drive-select lines (probably something like
"selected, but motor off), but I don't recall the details either.
--Chuck