INTERFACE CIRCUIT FOR COUPLING AN AUTOMATED MAINTNANCE SYSTEM TO A GPU

摘要

SPECIFICATION OF RONALD G. LANGE and ROBERT J. KOEGEL for INTERFACE CIRCUIT FOR COUPLING AN AUTOMATED MAINTENANCE SYSTEM TO A CPU Apparatus for use in coupling an automated maintenance system of general utility to a central processing unit of a data processing system. The interface apparatus is comprised of path control and operational condition control registers to control and enable the paths accessed by the automated maintenance system and to control the conditions of operation of the central processing unit. A control point register stores control point information from the central processing unit indicating its internal status. This information is read and displayed by the automated maintenance system. Address and data registers serve to buffer data and addresses exchanged between the automated maintenance system and the CPU. The disclosed interface apparatus allows a general utility automated maintenance system to be adapted to test a specific central processing unit.