NOP

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(mention interruptibility as another good reason for NOPping)
m (Protected "NOP" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite)))
 

Latest revision as of 09:01, 4 December 2010

Instruction NameNo Operation
MnemonicNOP
CP1610 Clock Cycles6
InterruptibleYes
Opcode Range$0034-$0035

The No Operation (NOP) instruction performs no function. Programs use NOPs as a time-killer for synchronization purposes. Programs also use NOPs to break up long sequences of non-interruptible instructions in order to allow the STIC to interrupt the CPU or request the bus. The opcode format is as follows.

   0000:0000:0011:010x
where: x is ignored
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