1
Steven L Belt, Scott A Hovey: Suspend/resume capability for a protected mode microprocessor. Zenith Data Systems Corporation, August 29, 1995: US05446904 (205 worldwide citation)

A laptop computer system includes a protected mode microprocessor capable of operating in restricted and unrestricted modes, and an arrangement which in response to a predetermined condition saves information from the processor and then forcibly switches the processor to its unrestricted mode of ope ...


2
Lon Eding: Self-aligning guide and track for removable disk drive module. Zenith Data Systems Corporation, Dillis V Allen, September 3, 1991: US05045960 (87 worldwide citation)

A slide guide for a removable computer drive module that permits the module to float as a self aligning connector engages. A computer housing has tracks that guide the module as it is inserted and release the forward end of the module just before the connector engages alignment pins that align the c ...


3
Saifee Fakruddin, Mark J Foster: Method and apparatus for battery-power management using load-compensation monitoring of battery discharge. Zenith Data Systems Corporation, Augustas Douvas, John Paniaguas, Chuck MacKinnon, June 25, 1991: US05027294 (79 worldwide citation)

A method and apparatus for monitoring the voltage discharge of a battery power supply while under load, and to manage the power supply by accurately calculating the time the useful charge is nearly depleted, providing a series of warnings to the user-operator of that fact, and subsequently performin ...


4
Saied Zangenehpour: Method of varying the amount of data prefetched to a cache memory in dependence on the history of data requests. Zenith Data Systems Corporation, Flynn Thiel Boutell & Tanis, September 8, 1992: US05146578 (74 worldwide citation)

A method of dynamically prefetching data for a cache memory is controlled by the past history of data requests. If the previous fetch and current fetch request are not sequential, no data is prefetched. If the previous fetch and current fetch request are sequential and less than all of the current f ...


5
Horst M Krenz: Installation mechanism for removable computer drive module. Zenith Data Systems Corporation, Dillis V Allen, April 23, 1991: US05010426 (73 worldwide citation)

An installation mechanism for a removable computer drive module with a handle operated automatically engaging dual rack and pinion device. The pinions are carried by the handle which is pivotally mounted adjacent a module receiving opening in a console. The module carries a pair of rails that have t ...


6
James F Bertone, Bruno DiPlacido Jr, Thomas F Joyce, Martin Massucci, Lance J McNally, Thomas L Murray Jr, Chester M Nibby Jr, Michelle A Pence, Marc Sanfacon, Jian Kuo Shen, Jeffrey S Somers, G Lewis Steiner: Symmetric multiprocessing system with unified environment and distributed system functions. Zenith Data Systems Corporation, Fitch Even Tabin & Flannery, May 14, 1996: US05517648 (72 worldwide citation)

A symmetric multiprocessing system with a unified environment and distributed system functions provides unified address space for all functional units in the system while distributing the execution of various system functions over the functional units of the system whereby each functional unit assum ...


7
Brian C Barnes, Mark J Foster, Lloyd W Gauthier, Saifee Fakhruddin, David J DeLisle, David R Veit: Personal computer having dedicated processors for peripheral devices interconnected to the CPU by way of a system control processor. Zenith Data Systems Corporation, Fitch Even Tabin & Flannery, January 18, 1994: US05280621 (71 worldwide citation)

A plurality of processors form a network used to communicate with one or more peripheral devices and the system control processor. One processor is dedicated to at least one peripheral device. Since the system control processor is not burdened with the relatively slow communications protocol with th ...


8
Saied Zangenehpour: Method and apparatus for positioning head of disk drive using zone-bit-recording. Zenith Data Systems Corporation, Flynn Thiel Boutell & Tanis, October 26, 1993: US05257143 (59 worldwide citation)

A zone-bit-recording disk drive has a rotating platter with a surface which is divided into at least two zones each having a respective different number of angularly spaced sectors therein. A method and apparatus for positioning the head relative to the platter surface involve maintaining a count of ...


9
Anthony M Olson, Babu Rajaram, Thomas N Robinson: Method for improving the page hit ratio of a page mode main memory system. Zenith Data Systems Corporation, June 12, 1990: US04933910 (57 worldwide citation)

Page mode memory access is enabled despite an immediately previous idle cycle. A row address strobe signal is maintained active during an idle cycle so that if a page hit is detected on a subsequent memory cycle, all that is needed to read or write to memory is a column address strobe signal which c ...


10
Wayne L Griffin, Eric D Fuhs, Robert A Kohtz, Peter A Ojeda: Heat-exchange panel for portable computer. Zenith Data Systems Corporation, December 25, 1990: US04980848 (56 worldwide citation)

A portable computer with a base and keyboard with a pivotal lid assembly containing both a visual display panel and a parallel mounted central processing unit circuit board, as well as coplanar memory and visual display driving circuitry. The lid assembly is provided with front and rear clam shell c ...