Z80:Opcodes:DJNZ: Difference between revisions
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<!-- What the instruction can be used for --> | <!-- What the instruction can be used for --> | ||
DJNZ is a very useful instruction when it comes to creating loops. See [[Z80:Control | DJNZ is a very useful instruction when it comes to creating loops. See [[Z80:Control Structures|Control Structures]] to find out more about loops. | ||
== T-States == | == T-States == | ||
Latest revision as of 08:00, 6 February 2016
Decreases B and jumps to a label if not zero. Note that DJNZ does a relative jump, so it can only jump between 128 bytes back/ahead.
Syntax
djnz label
Effects
Preserves all flags.
Uses
DJNZ is a very useful instruction when it comes to creating loops. See Control Structures to find out more about loops.
T-States
| B != 0 | 13 |
| B == 0 | 8 |
See Also
