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. Eric -----Original Message----- From: Karl Bongers <kbongers at infinetivity.com> To: tclug-list at mn-linux.org Date: Mon, 30 Jun 2003 09:18:36 -0500 Subject: Re: [TCLUG] Need OLD ISA serial card bigtime I doubt that using an old card will fix it. 9600 baud serial is the same on a old PC/8250 as it is on a new MB. You might try configuring for 2 stop bits instead of just 1, problem is most likely flow control(RTS/CTS, or XON/XOFF). If you really want, I've got an original PC ISA serial/printer board with a 16450(good and slow). The printer port TTL gates even have a a jumper I added to allow input. You should see the old one I kludged up to turn into a MIDI port, added a big fat 2Mhz crystal and some opto isolators, those were the good ol days. On Sun, Jun 29, 2003 at 12:51:19PM -0500, Bill Layer wrote: > I am trying to solve a really screwed up hardware problem re: > communication between a modern, fast system and an HP 9600 baud pen > plotter. > > I need an old, legacy ISA serial card with one or two 8250-era (slow) > UARTS on board. I suspect that the Winbond Super-IO 16550C port emulation > in the new machine is just not happy to signal/handshake with the old 9600 > baud UART in the plotter.. > > Anybody got an old throwaway like this laying about? > > -.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 _______________________________________________ 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