Command queuing apparatus and method of optical disk data reproduction system
US6088742A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/385
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided to buffer commands sent from a computer to a peripheral device such as an optical disk data reproduction system, e.g., a CD-ROM drive, so that, even when execution of a command by a microcontroller of the peripheral device is not completed, additional commands from the computer can be queued. The apparatus includes: (1) an intention data detection unit for detecting intention data expressing that a packet command is to be sent from a computer and for outputting the detected result; (2) a command storage unit for buffering the packet command in response to a write signal and for outputting a buffered packet command, in response to a read signal, to a microcontroller of the optical disk data reproduction system, which processes the packet command; (3) a wait state control unit for outputting the write signal in response to the detected result and a command write signal indicating that the computer has sent the packet command, and for outputting a read signal in response to a command read signal which is generated by the microcontroller and instructs the packet command to be transferred; and (4) a command presence detection unit for determining whet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.