| 摘要 |
<p>The present invention is directed to a control system for a rotating media storage device. The rotating media storage device includes a control board having a ROM to store a basic power up control program, one or more processing means for control of the storage device and communication between the storage device and the host computer and a read/write memory means such as a RAM. When the storage device is powered up, the basic code in ROM initializes the control system, activates the rotating storage media, and accesses a control code stored on the storage media. This permits changing and updating of the control program simply by writing to disk and transferring the new program into the RAM for execution. In addition, it is not necessary to power down the drive in order to change the control program. The control system of the present invention includes a dual processor architecture for distributed control of storage device operations. Communication between the processors is accomplished on a microwire utilizing a novel communications protocol which permits high speed processing of individual distributed functions and high speed communication between the processors. The present invention provides a serial port coupled to the processors and used to implement a test environment with a host computer. Emulation code can be downloaded to the storage device to the serial port and stored in the RAM memory.</p> |
