Computer with multi booting function

Details Computer with multi booting function Computer with multi booting function

1997-05-07

2000-06-20

Palys, Joseph E.

Electrical computers and digital processing systems: support

Digital data processing system initialization or configuration

Loading initialization program

710 10, 714 36, G06F 9445

Patent

active

060790164

ABSTRACT:
A computer having multi booting function with more than two boot-ROMs is disclosed. The boot-ROMs comprise a flash RAM, and have the same address space in the computer system. Preferably, the first boot-ROM is provided with a general boot program, and the second boot-ROM with detailed diagnostic program. Alternatively, the first boot-ROM is provided with a conventional boot program, and the second boot-ROM with reprogrammed or updated boot programs. Provided is a select signal generator for producing select signals which designate one of said boot-ROMs and a boot-ROM select circuit for producing control signals that selectively activate one boot-ROM in response to the memory control signals fed from the CPU and one of said select signals. The select signal generator includes a first and second reset switches for producing a first and second chip select signals, each designating the first and second boot-ROMs. Also, those first chip select signal and second chip select signal can be produced in response to an input of a specific key combination from the keyboard and keyboard controller.

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