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GPIB Adapter Circuit for Displaywriter and Personal Computer

IP.com Disclosure Number: IPCOM000060587D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Carson, PV Heimsoth, DD Rzepka, JM [+details]

Abstract

The Displaywriter/Personal Computer General-Purpose Interface Bus (GPIB) adapter shown in Fig. 1 is designed to be used in either an IBM Displaywriter or an IBM Personal Computer. The GPIB provides talker/listener/controller functions and a battery-backed real-time clock to either an IBM Displaywriter or an IBM Personal Computer. The talker function allows a device to send status and data bytes when addressed to talk. The listener function allows a device to receive data when addressed to listen. The controller function allows a device to send addresses as well as universal and addressed commands to other devices. The card shown in Fig. 1B is organized as follows.