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Emulation Mode

The processor enters Emulation mode if Emulation mode is enabled and either of these conditions is met:

  • An external emulation event occurs.
  • The EMUEXCPT instruction is issued.

The processor remains in Emulation mode until the emulation service routine executes an RTE instruction. If no interrupts are pending when the RTE instruction executes, the processor switches to User mode. Otherwise, the processor switches to Supervisor mode to service the interrupt.

Emulation mode is the highest priority mode, and the processor has unrestricted access to all system resources.