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
Print processing method, print relay server, control method, and storage medium to reserve print data
Acoustic echo cancellation
Undercabinet plug-in mount
Digital watermark embedding apparatus, digital watermark embedding method, and digital watermark detection apparatus
Motor with power-generation coil module
Device and method for processing input data of protective relay
  Randomly Featured Patents
Method of detecting the expression of alpha platelet-derived growth factor receptor gene
Superconducting thin film and wire and a process for producing the same
Multi-layer auxiliary electrode
Pumping system having a pressure release
Optical-fiber gyroscope of sagnac type having a fiber-optic loop and 3.times.3 coupler
Reciprocating plunger pump with seal mounting support
Disease management system including a no response method
Directional harmonic overcurrent relay device
Apparatus for separable external serial collection, storage and processing of biopsy specimens
Method and device for treating particulate material