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How bits 2 &3 of register A be set when executing OP2A instruction?

Latest Updated:09/27/2004

Question:

(CPU)   Port P2 consists of only P20 and P21.
How should bits 2 and 3 of register A be set when executing the OP2A instruction? [2004/09/27]

Answer:

Set them to 0 or 1. Note that when executing the IAP2 instruction, bits 2 and 3 of register A are set to 0. (#105047)
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