Digital Sample Instruction
Original Publication Date: 1979-Mar-01
Included in the Prior Art Database: 2005-Feb-20
An effective apparatus for controlling an input/output device is a controller including a programmed logic array (PLA) which is tailored to the functions of the device. In such a controller, when there is a diagnostic requirement that entails the repetitive sampling of signal levels on a bus to determine conditions such as up, down or pulsing to isolate failures, a software solution would require either a higher performance controller or an independent hardware sampling device.