1989_MELPS_7700_Software_Manual

8MI
Operation
When N=1,
Branch on Result Minus
PC f-- PC + 2 ± REL (REL is instruction's second byte)
PG f-- PG + 1 (if carry on PC), PG f-- PG - 1 (if borrow on PC)
8MI
When N=O,
PC f-- PC + 2
PG f-- PG + 1 (if carry on PC)
Description
When the negative flag N is set (1), the 8MI instruction causes a branch to the
specified address. The branch address is specified by a relative address.
When the negative flag N is clear (0), the program advances to next step without
any action.
Status flags
Not affected.
Addressing mode Syntax Machine code Bytes Cycles
Relative 8MI rr 3016, rr 2 4
(Note1) The cycles-count increases by 2 when a branch occurs.
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