Browse Prior Art Database

Automated Generation and Verification of ROS Bit Patterns

IP.com Disclosure Number: IPCOM000047587D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Davies, AD: AUTHOR [+2]

Abstract

When a read-only store (ROS) is designed, much time is required to manually generate test bit patterns and verify these patterns. Disclosed herein is an automated program for generating and verifying test bit patterns. Referring to Fig. 1, the Addresses to Bit Pattern Conversion Program 10 is a stand-alone program which generates ROS bit patterns from user-specified data. The user-specified data 12 (which is input to the program via a terminal) specifies the size of the ROS and the bits of which addresses are to be ON. All bits not specified will default to OFF. The input bit/address pattern may represent standard test patterns (e.g., all addresses ON, checkerboard pattern, etc.) or any user-desired test pattern. Program 10 converts these addresses to a bit pattern representing the ROS personality.

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Automated Generation and Verification of ROS Bit Patterns

When a read-only store (ROS) is designed, much time is required to manually generate test bit patterns and verify these patterns. Disclosed herein is an automated program for generating and verifying test bit patterns. Referring to Fig. 1, the Addresses to Bit Pattern Conversion Program 10 is a stand-alone program which generates ROS bit patterns from user-specified data. The user-specified data 12 (which is input to the program via a terminal) specifies the size of the ROS and the bits of which addresses are to be ON. All bits not specified will default to OFF. The input bit/address pattern may represent standard test patterns (e.g., all addresses ON, checkerboard pattern, etc.) or any user-desired test pattern. Program 10 converts these addresses to a bit pattern representing the ROS personality. The output data 13 is a set of 80-byte records, starting with identifying data records 1, 2, 3 and 6, followed by repeated 7-type records representing the generated ROS bit pattern. The 1, 2, 3, 6 and 7 records may be formatted in any predetermined manner. The integrity of the generated bit pattern and the proper functioning of the personalized ROS may be verified by a Bit Pattern to Address Conversion Program 15 (Fig. 2), which displays what the bits are at each address in the ROS. The input 14 to Bit Pattern to Address Conversion Program 15 is the output data 13 from program 10 or actual personality data from...