Michael L Saunders

US Patent:

6957294, Oct 18, 2005

Filed:

Nov 15, 2002

Appl. No.:

10/295161

Inventors:

Michael J. Saunders - Norristown PA, US
Vincent S. Yip - Philadelphia PA, US
Joseph P. Neill - East Fallowfield PA, US
Richard Grzegorek - Eagleville PA, US
James R. Hunter - Chadds Ford PA, US

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

G06F012/00

US Classification:

711 4, 711112, 711111, 711114, 711115, 711161, 711162, 709220, 709221, 709223, 709226

Abstract:

The present invention provides systems and methods for allocating a pool of global memory among a set of client/servers so that storage volumes associated with a plurality of client/servers are each allocated a portion of the pool of global memory for caching of data from that volume. The amount of memory to be used for caching the volume's input/output operations (I/Os), the page size, the cache type, the cache replacement policy and the maximum cache read can be specified by volume. The amount of memory to be used for caching the volume's input/output operations, the cache type, the cache replacement policy and the maximum cache read I/O size can be changed dynamically by the changing volume-based attributes.

US Patent:

51796910, Jan 12, 1993

Filed:

Apr 12, 1989

Appl. No.:

7/336971

Inventors:

Steven M. O'Brien - Norristown PA
Arthur J. Nilson - Norristown PA
Jayant S. Pandya - Center Square PA
Michael J. Saunders - Norristown PA

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

G06F 9455
G06F 930
G06F 300

US Classification:

395500

Abstract:

An apparatus for enhancing the operation of a M byte instruction word CPU when operating user programs on an N byte instruction word CPU. The M-Byte instruction word CPU is provided with an N-Byte instruction register and a main memory for supplying N-Byte instruction words or M-Byte instruction words to said N-Byte instruction register. An operational code multiplexer and an parameter code multiplexer are connectable to selective outputs of said instruction register so that any one of the M-Bytes may be selected as an operational code and any one of the remaining M-Bytes may be selected as parameter code bytes, and selection means including sequencer means are provided for operating the operational code multiplexer and the parameter code multiplexer in an M-Byte instruction word CPU mode of operation or as an N-Byte instruction word CPU mode of operation.

US Patent:

58226141, Oct 13, 1998

Filed:

May 31, 1996

Appl. No.:

8/655806

Inventors:

Kenneth A. Kenton - Wilmington DE
Richard A. Coffman - Phoenixville PA
Edward A. Miller - Telford PA
Michael Saunders - Norristown PA
Jeffery A. Stell - Exton PA

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

G06F 900
G06F 1310
G06F 1312

US Classification:

395828

Abstract:

A method and apparatus enables a newly installed peripheral device such as a disk device to be used with a computer system without changing the operating system. The peripheral device is identified as a type which is not recognized by an operating system operating in conjunction with the computer system. A value which identifies at least one logical attribute of said peripheral device is obtained from said peripheral device. A determination is made as to whether the operating system and the peripheral device are compatible based on the logical attribute obtained from the peripheral device. The operating system and the peripheral device communicate if it is determined that the operating system and the peripheral device are compatible (i. e. , can operate together).

US Patent:

52789730, Jan 11, 1994

Filed:

Jun 27, 1991

Appl. No.:

7/722722

Inventors:

Steven M. O'Brien - Norristown PA
Michael J. Saunders - Norristown PA
Arthur J. Nilson - Norristown PA

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

G06F 922

US Classification:

395500

Abstract:

A mainframe computing system is adapted to be loaded with one of a plurality of different operating systems and different associated microcode to provide a computing system which is capable of running user programs adapted to be executed by the loaded operated system comprises a main memory for receiving the desired operating system coupled to a system bus. An instruction processor and an input/output control processor are coupled to the system bus and are provided with an instruction register for presenting user program instructions to the processors. The processor means have associated therewith microcode storage memory which receive and store a set of microcode instructions to be performed by the processors according to the program instruction stored in the instruction register. The stored microcode comprises primary microcode instructions to carry out each of the instructions in the instruction register means. No compiling or emulation is necessary to provide a software configurable computing system adapted to run user programs according to one of a plurality of operating systems loadable in the main memory.

US Patent:

62725602, Aug 7, 2001

Filed:

Oct 13, 1998

Appl. No.:

9/170341

Inventors:

Kenneth A. Kenton - Wilmington DE
Richard A. Coffman - Phoenixville PA
Edward A. Miller - Telford PA
Michael Saunders - Norristown PA
Jeffery A. Stell - Exton PA

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

G06F 300
G06F 1312

US Classification:

710 8

Abstract:

A method and apparatus enables a newly installed peripheral device such as a disk device to be used with a computer system without changing the operating system. The peripheral device is identified as a type which is not recognized by an operating system operating in conjunction with the computer system. A value which identifies at least one logical attribute of said peripheral device is obtained from said peripheral device. A determination is made as to whether the operating system and the peripheral device are compatible based on the logical attribute obtained from the peripheral device. The operating system and the peripheral device communicate if it is determined that the operating system and the peripheral device are compatible (i. e. , can operate together).