Lsi Logic Corporation

Steven R Kemp

Venitha L Manter

David A Fechser

Alan D Poeppleman

Clifford A Whitehill

A method and apparatus for performing efficient reseeks in an optical storage device. As data sectors are read by the optical storage device, address information corresponding to sectors being processed by the optical storage device is stored in a stack. The stack may be composed of shift registers that shift the address information of new sectors down the stack as they are read. When an interrupt occurs, a selector determines which stack location contains address information for the sector being processed, and transfers the address information to a register. The address information is held in the register until it is accessed by a microprocessor. The microprocessor uses the address information to determine a reseek location, and causes the sector being processed to be read again.

Method and apparatus for performing efficient reseeks in an optical storage device

A virtual monitor controller includes a data storage device coupled to receive and output data; an instruction storage device coupled to receive and output instructions; a status storage device coupled to receive and output status data; and a mode storage device coupled to receive and output mode data. The virtual monitor controller is included in a debugger/monitor controller. A debugger/monitor system comprises a host system; the debugger/monitor controller; and a digital processor. Preferably, the controller is coupled between the processor and IC logic. A method of operating a virtual monitor comprises the steps of intercepting an instruction fetch from a microprocessor; downloading instructions from a host computer; and operating the microprocessor with the instructions. Preferably, the instructions are sequentially downloaded.

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Loveland, CO, United States of America

Steven R Kemp