RS232 problems in Windows 98

[Robert]

Hello,

I'm using the http://www.codeworks.it/net/VBNetRs232.htm rs232 class
to communicate with a portable instrument. It runs like a dream in
Windows NT/2000/XP
But in Windows 98 I get tons of time out errors. (This is on the
_same_ pc with NT/98 dual boot)

It's running at 115.2 kbps and 57.6 kbps with the same problem (9k6
works fine though, but waaay to slow)

I've done a very simple single threaded send/receive stress test
application that runs for hours in 115.2kbps without any errors
between two machines booted in Windows 2000, but gives me transfer
errors almost every minute between Win98 and Windows 2000.
The problems seems to lie in the way dotnet accesses the hardware in
Windows 98.
Been fiddling with fifo buffert sizes etc, without any result.

Any help or pointer would be appreciated

Thanks,
/Robert