Browse Prior Art Database

Software Device Simulator

IP.com Disclosure Number: IPCOM000078635D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Cocking, RC: AUTHOR [+2]

Abstract

Programs are sometimes tested by operating them under the control of a monitor program. The monitor program operates on the instructions of the program being tested in a way, that simulates the actual operation of either the computer under which the monitor is operating or a different computer. As the computer operation is simulated, the monitor program gathers information about the operation of the program being tested. A channel simulator program similarly interprets channel command words for handling I/O operations of the program being tested.

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Software Device Simulator

Programs are sometimes tested by operating them under the control of a monitor program. The monitor program operates on the instructions of the program being tested in a way, that simulates the actual operation of either the computer under which the monitor is operating or a different computer. As the computer operation is simulated, the monitor program gathers information about the operation of the program being tested. A channel simulator program similarly interprets channel command words for handling I/O operations of the program being tested.

The drawing shows the operation of a program to simulate in software an I/O device. The person performing the test first performs an operation to activate the device simulator program, and enters the identification of the device to be simulated and its assigned address. The device simulator program is provided with tables that include the characteristics of various I/O devices; optionally, the operator may supply the characteristics of a device to the device simulator and a table is formed for the newly simulated device.

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