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Emulation Mode Flag

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The Emulation Mode flag controls whether the 65c816 is behaving like a 6502.

When clear, the MPU is in 65c816 native mode.

When set, the MPU is in 6502 emulation mode.

This flag cannot be modified directly and is normally hidden from the programmer. To modify it, use the XCE instruction to swap its value with the carry flag's value.

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