Resources Contact Us Home
Patching of a read only memory

Image Number 3 for United States Patent #6260157.

A processing device includes a ROM having program instructions and at leas one jump instruction stored therein, a patch program for patching the program instructions in the ROM, a RAM capable of storing the patch program and a patch vector table that indicates the location of the patch program. A processor executes the program instructions in the program ROM and uses the patch vector table to execute the patch program when one of the jump instructions is reached. The patch program may be stored in the RAM and the patch vector table may point to the address in the RAM at which the patch program is stored so that the processor jumps directly to the RAM to execute the patch program when it reaches the one of the jump instructions. Likewise, a patch engine may be used to locate a specified patch program, load the specified patch program into the RAM and execute the specified patch program when the processor reaches the one of the jump instructions.

  Recently Added Patents
Systems and methods for universal enhanced log-in, identity document verification and dedicated survey participation
Method and system for facilitating micropayments in a financial transaction system
Facial recognition using a sphericity metric
Method and apparatus for a battery docking connector having reserve power for hot battery swap
Image forming apparatus and system connectable with an authorization apparatus via a communications network, the image forming apparatus comprising an apparatus control section, an initial inq
Systems, methods, and apparatus to determine physical location and routing within a field of low power beacons
Scalable pixel coverage function-map
  Randomly Featured Patents
Method for purification of II-VI crystals
Physical sensor
Lonicera japonica `Hinlon`
Installation for the forward drive regulation in motor vehicles
Corn and fiber refining
Method for removing phosphates from aqueous solutions
Trisaryl-1,3,5-triazine ultraviolet light absorbers
Front faceplate used in rear projection type screen, front-faceplate-equipped lenticular lens sheet, and rear projection type screen
Apparatus and method of preventing congestion in message transmission system
Cable and battery terminal cleaner