Personal computer using flash memory as BIOS-ROM
US5473775A · kind A · utility
48Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1992 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Oct 8, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1417
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.