System for extending functionality of a digital ROM using RAM/RO

Details System for extending functionality of a digital ROM using RAM/RO System for extending functionality of a digital ROM using RAM/RO

1997-03-21

1999-08-17

Ellis, Richard L.

Electrical computers and digital processing systems: support

Reconfiguration

395712, 348231, 348233, 348552, G06F 9445

Patent

active

059387661

ABSTRACT:
A system and method for extending the functionality of a digital system is disclosed. The system includes a read-only memory (ROM) for storing an extendible control application, a processing unit for executing the code stored in ROM, an imaging device for capturing optical images and converting them to digital code, random-access memory (RAM) for providing working memory for the processing unit and storage for files and images, an input-output (I/O) device for receiving user input and communicating with a host computer to transfer images and files, and an optional removable memory for providing storage for images and a means for introducing extensions into the system. The ROM image includes a patch manager and function pointers which, together, permit the redirection of the program execution sequence. New pieces of code (extensions) can, through such redirection, be incorporated into the original, non-modifiable control application, to supplement or replace routines of the original control application.

REFERENCES:
patent: 4425618 (1984-01-01), Bishop et al.
patent: 4542453 (1985-09-01), Patrick et al.
patent: 5410703 (1995-04-01), Nilsson et al.
patent: 5475428 (1995-12-01), Hintz et al.
patent: 5475441 (1995-12-01), Parulski et al.
patent: 5477264 (1995-12-01), Sarbadhikari et al.
patent: 5481713 (1996-01-01), Wetmore et al.
patent: 5493335 (1996-02-01), Parulski et al.
patent: 5546586 (1996-08-01), Wetmore et al.
patent: 5634058 (1997-05-01), Allen et al.
patent: 5752040 (1998-05-01), Kaneko et al.
AppleLink Newsbytes Review--NEC PC-DC401 Digital Still Camera Tokyo, Japan 1996 Mar. 15, pp. 1-3.
IBM Technical Disclosure Bulletin, Dual Indirect RAM/ROM Jump Tables for Firmware Updates, vol. 31, No. 1, Jun. 1988.
PCMCIA Standards, Release 2, Nov. 1992, pp. 5-3 to 5-4 and 5-47 to 5-52.
David D. Busch, PC/MS DOS 4.0 for Hard Disk Users, Bantam Books, 1989, pp. 33-41.
Cain, Thomas et al., Hard Disk Management for the IBM PC XT, AT and Compatible Systems, Prentice Hall Press, 1986, pp. 59-61.

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