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ZX Spectrum Next I/O Port System and Registers

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  • ZX Spectrum Next I/O Port System and Registers

    The ZX Spectrum Next stores configuration state for its various subsystems in a set of registers. These registers are accessible via two I/O Ports or via the special NEXTREG Z80N instructions. Port 0x243B (9275) is used to set the register number, listed below. Port 0x253B (9531) is used to access the register value. Some registers […]

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