| IMP (Indexing Mode Prefix) || 2-bit || Specifies the indexing mode (DD for IX+d, FD for IY+d, or none for HL) || Indicates use of index registers (IX or IY) for memory access.
|}
Note: EIP and IMP can be fusioned into a 3-bit internal state as there are only 7 possible values for the prefixes (none, ed, dd, fd, cb, ddcb, fdcb).
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