1989_MELPS_7700_Software_Manual

SEB
Set Bit
SEB
Operation
M f- M V IMM
IMM is the bit pattern that specifies the bit positions that are to be set to 1.
When the data length selection flag m is set to 1, IMM is placed in the third byte
(direct bit addressing mode) or the fourth byte (absolute bit addressing mode) of
the instruction.
When the data length selection flag m is set to 0, IMM is placed in the third and
fourth bytes (direct bit addressing mode) or the fourth and fifth bytes (absolute bit
addressing mode) of the instruction.
Description
The SEB instruction sets the specified memory bits to 1. Multiple bits to be set
can be specified at one time.
Status flags
Not affected.
Addressing mode Syntax Machine code Bytes Cycles
Direct bit SEB #imm, dd 0416, dd, imm 3 B
Absolute bit SEB #imm, mmll OCI6, II, mm, imm 4 9
(Note1) When operating on 16-bit data with the data length selection flag m set to 0, the bytes-count
increases by 1.
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