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IasJ: Precode [D>=16]

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IasJ: Precode [D>=16]

The IasJ: precode forces all instructions that contain 8-bit resource addresses to apply the index register I to the address argument using "J rules". It is primarily designed to allow MultiTrack programs to cross over between addressing modes, but has the spin-off consequence that nearly all memory and I/O instructions can now be indexed.