ports. For my purposes (setting up a variety of vintage specialized hardware over RS-232) NT-based operating systems are sometimes unusable because they present the application program with a virtual serial port, and MS-DOS programs running under those operating systems cannot read from or write to the UART registers. Some of the setup programs for that
If you're trying to bitbang the RS232 port to decode POCSAG or something perhaps. If you're trying to use old Windows software in more modern versions of Windows and can't because the old software doesn't know how to set up Windows for direct access to the hardware there is a utility called allowio.exe that can be run with your app and you can specify address ranges to allow through Windows. I used it running Win98 based laser show software that bit banged printer port under XP.
-- Ethan O'Toole
