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Conditionally Deleting a Program Depending Upon Its Ability to Communicate

IP.com Disclosure Number: IPCOM000059624D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Fountain, JW Pekowski, RP Wang, RT [+details]

Abstract

A method is described which provides a way for a DOS Initial Program Load (IPL) diskette to be configured to load a communications program on a Personal Computer (PC) and have that program delete itself or terminate and remain resident depending on whether a communications link can be established or not. The IBM Displaywriter/Personal Computer Attach Program (DWPC) is a program that allows a PC to communicate with and use the keyboard, display, and diskette drives of a Displaywriter. DWPC re-directs all PC keyboard and display input/output (I/O), communicating this information to the Displaywriter via an asynchronous communications link. When communications cannot be established, the PC hangs because the keyboard and display I/O has been re-directed to the Displaywriter.