Also known as an input/output interface, IOC, or PIOC for Peripheral input/output controller. The input/input controller is a device that interfaces between an input or output device and the computer or hardware device. The input/output controller on computers is commonly located on the motherboard. However, an I/O controller can also be an internal add-on that can either be used as a replacement or to allow for additional input or output devices for the computer.
Features
- Provides a direct interface between the Z80 microprocessor systems and peripheral devices
- Has two ports with interrupt-driven handshaking for fast response
- Has four programmable operating modes:
- Output mode (both ports)
- Input mode (both ports)
- Bidirectional (port A only)
- Bit control mode (both ports)
- Has programmable interrupts on peripheral status conditions
Block Diagram
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