Personal computer using flash memory as BIOS-ROM

Details Personal computer using flash memory as BIOS-ROM Personal computer using flash memory as BIOS-ROM

1992-10-08

1995-12-05

Kriess, Kevin A.

Boots, shoes, and leggings

364DIG1, 364280, 3642802, 3642809, G06F 924

Patent

active

054737753

ABSTRACT:
A personal computer uses a flash memory equipped with a main block storing a boot block and a basic input/output system as its BIOS-ROM. An address translation circuit, after power-on reset, supplies addresses output by a central processing unit to the BIOS-ROM as they are to thereby allow access to the boot block storing a far jump instruction. After system startup, the address translation circuit inverts a predetermined bit of each address output by the CPU to thereby allowing access to the BIOS. To refresh the contents of the BIOS-ROM, the CPU transfers a BIOS stored on a floppy disk to the main block of the BIOS-ROM.

REFERENCES:
patent: 5187792 (1993-02-01), Dayan et al.
patent: 5257380 (1993-10-01), Lang
patent: 5261104 (1993-11-01), Bertram et al.
"Flash memory BLOS for PC and notebook computers", Jerry Jex, IEEE. Conf. on comm., Computers and Signal Processing, May 1991, pp. 692-695.
IEEE Pacific Rim Conf. On Communications, Computers And Signal Processing. vol. 2, 9 May 1991, Victoria, BC, Canada pp. 692-695, JEX: `Flash memory BIOS for PC and notebook computers.`

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