Information Request: unidentified HP 9825T instructions

Noel Chiappa jnc at
Tue Feb 14 19:57:17 CST 2017

    > From: Tony Duell

    > Having other hardware decode instructions that appear as NOPs to the
    > main processor is not uncommon in HP machines.

Ah, so you actually had some prior knowledge that helped in working out that
puzzle, that that's what's happening here! :-)


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