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General-Purpose Interface Bus Data Transfer Simulator

IP.com Disclosure Number: IPCOM000064819D
Original Publication Date: 1985-Sep-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Knepper, LE [+details]

Abstract

This article describes a simulator to provide general-purpose interface bus (GPIB) data and handshaking signals with adjustable timing in order to measure performance of GPIB-compatible devices. The circuit arrangement disclosed herein provides handshaking signals on a GPIB with adjustable timings and data rates up to the limit of 1 megabyte per second, which can be used for test and performance measurements on GPIB-compatible devices. Specifically, this arrangement emulates a device performing data transfers using the three-wire handshake which consists of eight data lines and three handshake lines, data valid (DAV), not data accepted (NDAC), not ready for data (NRFD), and specified time relationships between them.