CP82C55 Series 24 I/O Pin 2.5mA CMOS Programmable Peripheral Interface - PDIP-40
28-Pin Commercial Temperature Interrupt Controller IC, 4.5-5.5V, 0-70°C, DIP-28
Interrupt Controller, 80C86; 80C88; 80C286; 8080; 8085; 8086; 8088; 80286; NSC800 Compatible, CMOS, PDIP28