COMM-DRV/Dos   
by Willies Computer Software Co (WCSC)   

Serial communication TSR/Driver that provides the FOSSIL, INT14h, and INT21h interface concurrently under MSDOS. Any language/tool that can read and write to files may read/write to the serial port. Includes (XYZ)modem file transfer engines, TSR to stuff serial communications data into keyboard buffer, dumb terminal emulator, multiterminal program, and a mini-BBS for uploading and downloading files.