Device and method for reconfiguring a computer system with an in

Details Device and method for reconfiguring a computer system with an in Device and method for reconfiguring a computer system with an in

1995-03-23

1997-10-07

Teska, Kevin J.

395527, G06F 1516

Patent

active

056757727

ABSTRACT:
A converter interface device transforms an incompatible first central processing unit (CPU2) chip into a chip compatible with a CPU1 chip. The CPU1 compatible chip, containing the CPU2, is interchangeable with the CPU1 chip. The converter interface device allows CPU2 to appear to a computer system as having the same pins and pin configuration as the CPU 1. The converter interface device has an address converter, a data converter and a control bus converter. These converters convert CPU2 signals into signals which are CPU1 compatible. In addition, the converter interface device has a bus decoder which decodes the converted CPU1 compatible signal of CPU2 and outputs a signal to a CPU switch unit. The CPU switch unit receives an external CPU select signal, and outputs a CPU1 and CPU2 enable/disable signals. Therefore, a computer system can be upgraded from CPU1 to CPU2, without having to discard the motherboard and software associated with the older CPU1. In addition, for a motherboard that can accommodate two or more CPUs, the converter interface device of the present invention allows having two different types of CPUs on such a motherboard, e.g., CPU1 and CPU2. The present invention further discloses a method for booting up the computer system to either CPU 1 or CPU2. Furthermore, a method for switching the computer system between CPU1 and CPU2 is disclosed.

REFERENCES:
patent: 5297272 (1994-03-01), Lu et al.
patent: 5386517 (1995-01-01), Sheth et al.
patent: 5515514 (1996-05-01), Dhuey et al.
patent: 5519883 (1996-05-01), White et al.

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