METHOD FOR HANDLING INTERRUPT REQUEST IN OPTICAL STORAGE DRIVE

• US 20050094524A1
• Filed: 10/19/2004
• Published: 05/05/2005
• Est. Priority Date: 10/29/2003
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Lu, Bo-Ching, Chen, Ping-Sheng
• Granted Patent: US 7,336,573 B2
• Time in Patent Office: Days
• US Class Current: 369/53.31
• CPC Class Codes: G06F 3/0611 in relation to response time
• CPC Class Codes: G06F 3/0656 Data buffering arrangements
• CPC Class Codes: G06F 3/0677 Optical disk device, e.g. CD-ROM, DVD
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 2020/10537 Audio or video recording
• CPC Class Codes: G11B 2020/10759 content data

Abstract

When an optical storage drive executes a control procedure or operation, a method of handling an interrupt request includes utilizing the optical storage drive to receive an interrupt request from a control circuit; checking whether the interrupt request is a read command; if the interrupt request is a read command, checking whether data indicated by the read command is in a buffer; and if the indicated data in the buffer, transferring the corresponding data to the control circuit from the buffer to respond to the interrupt request.

Claims

1. A method for handling an interrupt request in an optical storage drive when the optical storage drive executes a control procedure or operation, the method comprising:

utilizing the optical storage drive to receive an interrupt request from a control circuit;

checking whether the interrupt request is a read command;

if the interrupt request is a read command, checking whether data indicated by the read command is stored in a buffer; and

if the indicated data is stored in the buffer, transferring the corresponding data to the control circuit from the buffer to respond to the interrupt request.

2. The method of claim 1, wherein the buffer is a volatile memory of the optical storage drive.

3. The method of claim 1, wherein the buffer is a register of the optical storage drive.

4. The method of claim 1, wherein the control circuit is a host computer.

5. The method of claim 1, further comprising:

if the data indicated by the read command is not stored in the buffer, suspending handling the interrupt request.

6. A storage medium for storing program code used to control an optical storage drive to perform the following steps while executing a control procedure or operation:

receiving an interrupt request from a control circuit;

checking whether the interrupt request is a read command;

if the interrupt request is a read command, checking whether data indicated by the read command is stored in a buffer; and

if the indicated data is stored in the buffer, transferring the corresponding data to the control circuit from the buffer to respond to the interrupt request.

7. The storage medium of claim 6 being a non-volatile memory.