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Zilog Z80
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==== Bugs ==== The {{code|OTDR}} instruction does not conform to the Z80 documentation. Both the {{code|OTDR}} and {{code|OTIR}} instructions are supposed to leave the carry (C) flag unmodified. The {{code|OTIR}} instruction operates correctly; however, during the execution of the {{code|OTDR}} instruction, the carry flag takes the results of a spurious compare between the accumulator (A) and the last output of the {{code|OTDR}} instruction.<ref name="Young 1998" />
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