- In computing, an
opcode (abbreviated from
operation code, also
known as
instruction machine code,
instruction code,
instruction syllable,
instruction parcel...
- An
opcode table (also
called an
opcode matrix) is a
visual representation of all
opcodes in an
instruction set. It is
arranged such that each axis of...
- two classes: Pre-existing
opcodes that
needed new
mnemonics for
their 32-bit
OperandSize variants (e.g. CWDE, LODSD) New
opcodes that
introduced new functionality...
- An
illegal opcode, also
called an
unimplemented operation,
unintended opcode or undo****ented instruction, is an
instruction to a CPU that is not mentioned...
-
Opcode Systems, Inc. was
founded in 1985 by Dave
Oppenheim and
based in and
around Palo Alto, California, USA.
Opcode produced MIDI
sequencing software...
- the
numerical machine code and a human-readable
version where numerical opcodes and
operands are
replaced by
readable strings (e.g. 0x90 is the NOP instruction...
- uses a
mnemonic to represent, e.g., each low-level
machine instruction or
opcode, each directive,
typically also each
architectural register, flag, etc....
- instructions. On the
processing architecture, a
given instruction may specify:
opcode (the
instruction to be performed) e.g. add, copy, test any
explicit operands:...
- SIGTRAP. The
opcode for INT3 is 0xCC, as
opposed to the
opcode for INT immediate8,
which is 0xCD immediate8.
Since the
dedicated 0xCC
opcode has some desired...
-
opcode is not the same as a
machine language opcode,
though in some
cases it may be
directly encoded as a bit
field within a
machine language opcode....
