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Interrupt-Driven KEYSTROKE Capture and Playback

IP.com Disclosure Number: IPCOM000036545D
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29

Publishing Venue

IBM

Related People

Authors:
Lin, C Morris, GL Pancoast, ST Yee, A [+details]

Abstract

Disclosed is a programming method for recording keystroke data, maintaining and playing keystroke data back on a PC Convertible. Existing tools for the IBM PC did not support the IBM PC Convertible due to its unique non-mistable interrupt (NMI) structure. A keyboard clear NMI is used to save the converted PC1 scan code, keystroke status byte and delta time period in the memory buffer, which holds the data until it is to be written into a test keystroke file. These saved keystroke scan codes in the keystroke test file can be modified, if needed, and played back by a program that writes the keystroke data back to an I/O port and generates the appropriate interrupt. Related Concepts