The DP8212 DP8212M is an 8-bit input output port contained in a standard 24-pin dual-in-line package The device which is fabricated using Schottky Bipolar technology is part of National Semiconductor's 8080A support family The DP8212 DP8212M can be used to implement latches gated buffers or multiplexers Thus all of the major peripheral and input output functions of a microcomputer system can be implemented with this device The DP8212 DP8212M includes an 8-bit latch with TRI-STATE output buffers and device selection and control logic Also included is a service request flip-flop for the generation and control of interrupts to the microprocessor