NAME   rev ADDR type chip Description
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INTREQ   09C  W         P Interrupt request bits (clear or set)
INTREQR  01E  R         P Interrupt request bits (read)

	This register contains interrupt request bits (or flags).
	These bits may be polled by the processor, and if enabled
	by the bits listed in the next register, they may cause
	processor interrupts. Both a set and clear operation
	are required to load arbitary data into this register.
	The bit assignments are identical to the enable register
	below.