Apparatus and method for switching an operating frequency of a computer motherboard
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United States of America Patent
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Dec 1, 1998
Grant Date -
N/A
app pub date -
Nov 1, 1996
filing date -
Nov 1, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for switching the operating frequency of a computer host board by setting on a screen of the computer is disclosed. The apparatus and method use a frequency selection controller, instead of a switch or jumper selector used in a conventional apparatus and method, to control a frequency doubling factor required for the CPU and system chip set and a frequency selection signal output to a frequency generator. The switching operating frequency method is accomplished by manually activating the system to enable the system firmware to set a frequency doubling factor and an operating frequency when the system is powered up, outputting an address signal including the frequency and a frequency to be switched by a data/address bus after the system firmware sets the frequency doubling factor and the operating frequency, and decoding the address signal and locking the frequency data, whereby to change the frequency doubling factor output to the CPU and chip set and a frequency selection signal output to a frequency generator.
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