Key scan code detecting and processing method for programmable keyboard of computer e.g. notebook computer, involves issuing command signal to keyboard by south bridge to retrieve scan code from data register of keyboard controller

摘要

The method involves establishing and storing a scan code table in a scan code table memory (25) e.g. Electronically-EPROM, accessed by the keyboard controller (21), where each scan code table contains a set of correlated data of keys and corresponding scan codes. An interrupt request signal to a south bridge (14) is generated by the keyboard controller after detecting actuation of the keys of a keyboard (24). A command signal to the keyboard is issued by the south bridge to retrieve the scan code from a data register (212) of the keyboard controller.