I have the PICSTART 16B1 Microchip Programmer, Using MP16B.exe in DOS
mode to connect to COM 1 and talk to the programmer.  It worked good
until I starting using another piece of equipment that used COM 2.  Now
the programmer will not work even though I have completely removed the
equipment that uses COM2.

I took the programmer and the program to another computer and it works
fine.

The error it displays is a timeout on accessing the port.   I tried the
programmer on both COM1 and COM2.  I check the drivers and it is using
serialui.dll and serial.vxd.  The setup has the defaults (i.e 9600
baud).  There is no conflicts shown in the system properties resources.

I tried replacing the cable from COM1 on the motherboard to the serial
connector.  I though maybe a loose connection.  I tried the new piece of
equipment on COM 1 and it works.

Does anyone know of other areas of the computer I can check for
conflicts or settings.

Thanks

John