Bootstrap loading from external memory including disabling a res

Details Bootstrap loading from external memory including disabling a res Bootstrap loading from external memory including disabling a res

1994-03-01

1995-04-25

Kulik, Paul V.

Boots, shoes, and leggings

395425, 364DIG1, 364280, 3642802, G06F 9445

Patent

active

054107075

ABSTRACT:
A computer system bootstrap loads a processor and associated memory from an external memory device instead of being bootstrap loaded from on-board read only memory. The computer system is comprised of a system bus, a processing component, a first system memory device, a memory card interface controller, and an external memory device connected to the memory card interface controller. The system also includes a second system memory device, a keyboard memory device, a keyboard controller and a reset switch for causing a reset and initialization of the processing component. Upon reset, the logic in the memory card interface controller remaps the address space associated with the first system memory device to the external memory device and remaps the address space associated with the second system memory device to the keyboard memory device. This remapping redirects execution control of the processing component to the external memory device and allows the keyboard memory device to be loaded and verified by the processing component. The keyboard controller is held in a reset state. Once the keyboard memory device and local random access memory has been loaded from the external memory device, the address space remapping of the first and second memory devices is restored to a normal configuration. The contents of the first and second memory devices can then be loaded and verified. The reset condition is then removed from the keyboard controller and normal operation of the computer system is restored.

REFERENCES:
patent: 4456972 (1984-06-01), Lee et al.
patent: 4498151 (1985-02-01), Henry
patent: 4679166 (1987-07-01), Berger et al.
patent: 4720812 (1988-01-01), Kao et al.
patent: 4802119 (1989-01-01), Heene et al.
patent: 4943911 (1990-07-01), Kopp et al.
patent: 5012514 (1991-04-01), Renton
patent: 5086503 (1992-02-01), Chung et al.
patent: 5155833 (1992-10-01), Cullison et al.

Affiliated with

Also associated with

Rating

Bootstrap loading from external memory including disabling a res does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bootstrap loading from external memory including disabling a res, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bootstrap loading from external memory including disabling a res will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1574641