Computer system having flash memory bios which can be accessed w

Details Computer system having flash memory bios which can be accessed w Computer system having flash memory bios which can be accessed w

1997-05-22

1999-11-16

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

710 5, G06F 1502

Patent

active

059875364

ABSTRACT:
Disclosed is a personal computer system which includes a central processing unit (CPU) coupled to a direct access storage device (DASD) and a random access memory (RAM). A flash memory module is coupled to the CPU and an input/output (IO) bus and includes a basic input output system (BIOS) stored therein. The BIOS is effective for responding to the energization of the computer system by initiating a power on self test (POST). The BIOS is further operative on completion of the POST for transferring a portion of BIOS from the module to the RAM and for transferring control of the of the computer system to the BIOS portion. The portion of BIOS is operative to load a protected mode operating system (OS) into RAM and transfer control to the OS. The system further includes a logic circuit coupled to the flash memory module and the IO bus for allowing the BIOS in flash memory to be accessed while the protected mode OS is running.

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