Intel 8243 Input/Output Expander

Features

• Functionally based on the Intel 8243 device Five 4-bit peripheral ports: P20, P40, P50, P60, P70
• Two control signals: CS, PROG
• Four programming modes for peripherals (three write and read modes)
• 4-bit bidirectional system data bus with standard microprocessor interface controls
• VHDL behavioral model source files are available for free!