This source code allows the user to access MSCDEX extension for the CD-ROM drivers. It will run in Windows, protected, and DOS environments. It also demonstrates how to access interrupt routines from protected mode. Thanks to Rex K. Perkins for his program SimRMI. This code allows access to real mode interrupts under DPMI. Look for the file REALIN.ZIP. If you have any questions or if you find any bugs, feel free to contact me on Compuserve (72740, 1145) or write to: Michael W. Armstrong 2800 Skipwith Rd Richmond, VA 23294 I am entering this code as shareware. If you find it useful, a small donation would be appreciated.