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+--- Thread: 16 bit I/O Port Addressing (/thread-344.html)
16 bit I/O Port Addressing - someone - 11-07-2021
Although seemingly novel, the concept of using 16-bit I/O addresses is not unique to the microbee's viatel option.
It was previously used on the DG680 CPU S100 board for its SWP (Software Write Protect) circuit.
16 bit I/O addresses are described in Zilog's Z80 Assembly Programming Manual.