GPIB Adapter Circuit for Displaywriter and Personal Computer
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
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.