1989_MELPS_7700_Software_Manual

BNE
Branch on Not Equal
BNE
Operation
When Z=O,
PC (- PC + 2 ± REL (REL is instruction's second byte)
PG (- PG + 1 (if carry on PC), PG (- PG - 1 (if borrow on PC)
When Z=1,
PC (- PC + 2
PG (- PG + 1 (if carry on PC)
Description
When the zero flag Z is clear (0), the BNE instruction causes a branch to the
specified address. The branch address is specified by a relative address.
When the zero flag Z is set (1), the program advances to next step without any
action.
Status flags
Not affected.
Addressing mode Syntax Machine code Bytes Cycles
Relative BNE rr D016, rr 2 4
(Note1) The cycles-count increases by 2 when a branch occurs.
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