Difference between revisions of "Z80:Opcodes:EXX"
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Latest revision as of 22:31, 5 February 2016
EXX exchanges BC, DE, and HL with shadow registers with BC', DE', and HL'.
Contents
Syntax
exx
Effects
All flags preserved.
Uses
Most useful in interrupts as an alternative to saving those registers on the stack. If you want to use this command outside an interrupt, make sure interrupts are disabled first.
T-States
4 t-states
See Also