Optical disk apparatus utilizing exclusively allocated servo sig

Details Optical disk apparatus utilizing exclusively allocated servo sig Optical disk apparatus utilizing exclusively allocated servo sig

1994-05-27

1996-10-29

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, 369 50, 369 54, G11B 7095

Patent

active

055703305

ABSTRACT:
An optical disk apparatus in which data is stored in internal registers of a digital signal processor need not be saved and returned when a servo processing based on an interrupt processing routine is executed. Internal registers of the digital signal processor are allocated. At least one group of the divided internal registers is exclusively allocated to the execution of a servo signal processing interrupt routine and the other groups of internal registers are exclusively allocated to execute a system control processing. With such allocations, when a sampling interrupt occurs, servo signal processing of a focus servo signal processing and a tracking servo processing is carried out without saving data from the internal registers of the digital signal processor. After servo processing is completed, the interrupt processing routine can be ended without returning data to the internal registers

REFERENCES:
patent: 4956832 (1990-09-01), Miyasaka
patent: 4989194 (1991-01-01), Aoi
Motorola, Inc., "DSP56000/DSP56001 Digital Signal Processor User's Manual," DSP56000UM/AD-Rev. 2, 1990, pp. 1--1 through 3-13 (no month).
IBM Technical Disclosure Bulletin, vol. 31, No. 6, Nov. 1988, New York US, pp. 446-453, XP000253537 `Realtime Task Dispatcher for Multiloop Control Systems`.
Motorola Semiconductor Master Selection Guide Guide Rev 5, Motorola, Inc. 1992 Previous Edition 1991-pp. i, 2.1-3.

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