z80:Opcodes:DJNZ

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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

CALL,JP,JR