eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
147
EXX
Exchange Working Register Set with Alternate Register Set
Operation
BC ↔ BC’
DE ↔ DE’
HL ↔ HL’
Description
The CPU exchanges the contents of the primary working registers BC, DE, and HL with
the alternate working registers BC’, DE’, and HL’, respectively.
Condition Bits Affected
None.
Attributes
Mnemonic Operand ADL Mode Cycle Opcode (hex)
EXX —X 1D9
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