In message <00cb01c575a1$1d545e20$6ea8a8c0@acervfr9okf50t>, "Brad du Plessis" w
rites:
>I see the same funny characters.
>Its definitely something funny with the speed settings, connecting 2 ports 
>on the same card with a null-modem works fine.

This suggests a brute-force solution.

Time the sending of a 1000MB file over the cable, and...

That said, looking at their instructions for using another card with Linux,
there may be a non-volatile register on the card for storing a base baud rate
with respect to which everything is divided; their instructions have the user
boot under DOS once to run a utility that sets the base baud rate for the card
to 920kbps, then tell the Linux serial driver that the card's running at
920kbps.

-s