Serial communications

[Ross Holding]

Hi,

I'm using a DOS program under XP.

The DOS program uses COM1 to communicate to another DOS device.
(It communicates 'directly' with the port i/o=3F8, irq=4).

Although working, the serial communications are very erratic.
(Characters are almost received in a batch mode.)

Changing the processor priority does help a little, but if there's any
suggestions out there it would be appreciated.

Thanks,
Ross

 

[Bill Crocker]

Try going into Advanced properties, for your COM port, and disable FiFo
buffering. You could also go into your BIOS settings, and set that COM port
to the normal port settings you mentioned, rather than AUTO, or Plug'n'Play.

Bill Crocker