Abstract: A circuit and method for protecting a voltage inverter circuit is disclosed. The circuit comprises a first comparison circuit capable of comparing a first reference voltage to a voltage indicative of the load current of the voltage inverter. When the comparison circuit signals that the first reference voltage is greater than the load voltage, a disable circuit coupled to the first comparison circuit disables the voltage inverter. In the preferred embodiment, the inverter provides power to a cold cathode fluorescent lamp which, if damaged, can harm the inverter.
Abstract: An apparatus and method for a computer system having at least two disk drives in a data storage system wherein data may be read from or written to the disk drives simultaneously during a load multiple operation. Data from the disk drives may be simultaneously loaded into two different memory buffers utilizing the maximum available I/O data bus bandwidth.
Abstract: A computer which carries its BIOS in a Flash EPROM. A UV-EPROM carries a redundant BIOS, which can be overlaid onto the BIOS address space by selection with a physical switch.The BIOS contains a small core software program, at the BIOS entry point, which checks BIOS integrity, and provides for reloading the Flash EPROM's BIOS if needed (from a floppy disk, or by copying the entire contents of the UV-EPROM).
Type:
Grant
Filed:
May 29, 1991
Date of Patent:
February 7, 1995
Assignee:
Dell USA, L.P.
Inventors:
Wai-Ming R. Chan, Eric W. Schieve, Charles P. Zeller, Gary W. Abbott
Abstract: A computer system having power management control features which include states of normal clock speed operation, slow clock speed operation, and stop-clock operation based on input/output activity, system bus activity, and program parameters. The system detects inactivity over a period of time and places the system in one of the states to provide for power conservation and accessibility by a user.