Normal>These steps are the ones that enforce the basic prefetch
rule: just before the start of any instruction two words (no more and no less)
are already fetched. One word will be in IRD and another one in IRC.</p>

<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>

<p class=MsoNormal>For simple opcodes without extension words, the whole code
flow simply traverses the queue as described above. The prefetch flow is more
complicated when extension words are involved. Let’