Learn how to use Serial UART Interrupts in z80 Assembler.
The UART interrupts can tell your application when a new byte is available on the UART1 serial bus.
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Source files available to download from here:
https://github.com/richardturnnidge/lessons
Latest MOS documentation can be found here:
https://github.com/AgonConsole8/agon-docs/blob/main/MOS-API.md
