If you are running DOS, then an old board might help, DOS programs typically had built in drivers that could have problems on newer hardware. I can give you an old board if you want it. Both Win95/WinNT have software emulations of the first few serial ports, they might make things better or worse depending on your luck. Looks like dosemu/linux has a uart emulation as well, never tried it. If you can select between XON/XOFF(software) flow control and hardware flow control then try changing that. If you are using hardware flow control, make sure your cable is good. Or if you can describe the problem more, that would help. On Mon, Jun 30, 2003 at 10:04:19AM -0500, Bill Layer wrote: > On Mon, 30 Jun 2003 10:44:55 -0500 > "E Lofstad" <crc1021 at myrealbox.com> wrote: > > > It also might be the FIFO messing up the timing of the plotter. I > > believe the FIFO can be disabled by changing the UART type to 16450 or > > 8250 using setserial. > > No setserial in DOS, but there are utilites to disable the FIFO. That was > one thing I was going to try. > > -.bill.layer.- .-frogtown.mn.usa.- > > > _______________________________________________ > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > http://www.mn-linux.org tclug-list at mn-linux.org > https://mailman.real-time.com/mailman/listinfo/tclug-list > _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota http://www.mn-linux.org tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list