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INSTRUCTION SET DESCRIPTIONS
Operand
reg
An 8- or 16-bit general register.
reg16
An 16-bit general register.
seg-reg
A segment register.
accum
Register AX or AL
immed
A constant in the range 0–FFFFH.
immed8
A constant in the range 0–FFH.
mem
An 8- or 16-bit memory location.
mem16
A 16-bit memory location.
mem32
A 32-bit memory location.
src-table
Name of 256-byte translate table.
src-string
Name of string addressed by register SI.
dest-string
Name of string addressed by register DI.
short-label
A label within the –128 to +127 bytes of the end of the instruction.
near-label
A label in current code segment.
far-label
A label in another code segment.
near-proc
A procedure in current code segment.
far-proc
A procedure in another code segment.
memptr16
A word containing the offset of the location in the current code segment to which
control is to be transferred.
memptr32
A doubleword containing the offset and the segment base address of the location in
another code segment to which control is to be transferred.
regptr16
A 16-bit general register containing the offset of the location in the current code
segment to which control is to be transferred.
repeat
A string instruction repeat prefix.
C-2
Table C-2. Instruction Operands
Description
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