Browse Prior Art Database

Service Processor for Test System

IP.com Disclosure Number: IPCOM000083762D
Original Publication Date: 1975-Jul-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Herman, MB: AUTHOR

Abstract

A subsystem 2 is to be tested in its operation with other components of a data processing system. These other components are not available during the test and their operations are performed by an emulator 3. For example, when the subsystem 2 is a data store, the emulator 3 provides the data and control signals that a processor and channel would provide in an operating data processing system.

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Service Processor for Test System

A subsystem 2 is to be tested in its operation with other components of a data processing system. These other components are not available during the test and their operations are performed by an emulator 3. For example, when the subsystem 2 is a data store, the emulator 3 provides the data and control signals that a processor and channel would provide in an operating data processing system.

The emulator 3 is also useful for testing programs that would run on such a data processing system. Thus, the emulator has the capabilities of a high-speed data processing system. A separate processor, not shown, may be provided to process the data that is collected during a test.

A service processor performs initial program load for the emulator 3 and controls logout. It permits operating personnel to set up microcode in the emulator to control the test. It also helps the operating personnel to distinguish between errors that originate in the test subject and errors that originate in the emulator 3.

The service processor has a key entry device 5 for input to the service processor, and it has a display 6 that provides output from the service processor to the operator. The display may be a set of indicator lights.

A set of four registers 7 holds a history of four previous instructions or other entries, that permit the operating personnel to look at a sequence of preceding entries in the operation of the emulator. The registers 7 can be loaded...