Method and apparatus for determining time-related operating para

Details Method and apparatus for determining time-related operating para Method and apparatus for determining time-related operating para

1994-03-25

1996-11-05

Heckler, Thomas M.

G06F 108

Patent

active

055727166

ABSTRACT:
A basic input output system for a general-purpose computer provides a method for determining the oscillator frequency and setting system timing parameters by selecting a reference device and measuring the time necessary for performing a set number of operations of the reference device. Methods are disclosed for computer systems having fixed wait-state bus cycles and for systems having programmable wait-state bus cycles. The invention has particular applicability to Systems having CPU microprocessors that allow external selection of microprocessor-to-input oscillator frequency ratio. In such systems identification of the CPU microprocessor and its operating frequency is not enough information to set timing parameters for optimum performance. A BIOS and a general-purpose computer are provided in combination with the methods of the invention.

REFERENCES:
patent: 5459855 (1995-10-01), Lelm

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