com1 access denied - win xp

[Michael Wood]

Hi-ya,
I get an "Access is denied" error message when attempting to create a 
serial port connection through Cygwin, running on Win XP.

In cygwin, when I execute:
        ls -l COM1
I get the following:
        -rw-r--r--    1 mwood    mkgroup-        0 Jan  1  1970 COM1
However, when I execute:
        chmod a+rw COM1
the command exits normally (no error message), but the permissions on 
COM1 stay the same. Furthermore, I do not particularly understand why if 
I am the owner of COM1 (as illustrated by the 'ls -l'), why I would get 
a permission error.

I have successfully created and used a connection on the serial port on 
the same machine through a VMWare session running a Linux Red Hat image. 
I used a very similar procedure above, in that I simply changed the 
permissions on "/dev/ttyS0" to grant all users read and write 
permissions to the serial port.

Help would be greatly appreciated.
- Mike

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