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In message Thu, 30 Jun 1994 09:16:37 -0700 (PDT), Randal Whittle <whittle@chaph.usc.edu> writes: > Is there anyone on this list who uses the external serial port > and connects a v.32bis modem to it? I did this for a while with an Intel 14.4 fax/modem. > I runs fine when I lock it down at about 9600 baud, but at 14.4K > Baud, I have some problems. Namely, it seems to scramble an occasional > character when I'm in this EMACS editor, but more seriously, prevents > any meaningful file transfer at 14.4K baud (though 9600 works okay). It > produces a number of CRC errors. Yes, the TP750 only has a 16450 UART. On top of that, the serial port seems to be worse than others (my 386/33 with a 16450 had better performance while multitasking under OS/2). Someone else messing with (I think) a SLIP connection reported problems even with a bare config.sys and autoexec.bat. One thing that does cause problems is the DOS FuelDOS TSR. If you're loading that, don't. You might also try removing all nonessentials from your config.sys, autoexec.bat, and auto-starting Windows programs one by one to see if any of them are causing problems. Once I got rid of FUELDOS I had no problem with file transfers at 14.4 kbps under DOS. OS/2 still dropped the occasional character. Does anyone know if the 755 (and 360 and 510) have a 16550? I think it's a disgrace that vendors try to save a few bucks by using a 16450. This ranks right up there with clocks that are less accurate than $5 digital watches. -- John H. Kim | "Just try telling the IRS you don't feel like jokim@jarthur.cs.hmc.edu | 'contributing' this year come April" - Bob Dole This mail sent by NUPop | on Bill Clinton's avoidance of the word "taxes"