Abstract: A device for mounting a speaker on a portable computer is provided that hingably secures a speaker housing to the side of the display unit. The device and speaker housing move between a recessed and folded position and an unfolded and extended position. A channel shaped groove is formed in the side portion of the main body to allow the speaker housing to be folded into a recessed and flush position. The device may also be constructed with a latch that is attached to the speaker housing to secure the display unit to the main body in its folded position. To allow the distance between the speakers to be adjusted the device is constructed with an extendable bar that can slide in and out of the display unit.

Abstract: A method of controlling a hard disk cache in a computer having a hard disk drive which is controlled by a write back mode disk cache that reduces the amount of hard disk access includes: initializing a disk cache control program loaded during the software booting by an operating system; determining whether insertion of a new cell in the disk cache is available if an interrupt is invoked responsive to a write request; writing data contained within all cache cells stored in the disk cache into the hard disk drive and inserting the new cell of the write request data into the disk cache if a new cache cell is not available. With this, restricting access to the hard disk drive is possible, which result in reducing power consumption of a hard disk drive motor. Further, losing of data in the cache is prevented when a sudden system power failure or reset occurs.