Z80 Assembly 63: Interfacing with the Z80 SIO (Serial I/O)
The Role of the Z80 SIO The Z80 SIO (Serial Input/Output) chip is a sophisticated peripheral that acts as a dual-channel UART (Universal Asynchronous Receiver/Transmitter). It handles all the complex timing, start/stop bit generation, and error checking for serial communication entirely in hardware. Advantage: The SIO makes robust serial communication (like RS-232, modem, or network) fast and reliable, saving the Z80 CPU thousands of cycles compared to software bit-banging (Part 40). ...