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INSTRUCTION SET DESCRIPTIONS
C-2
Table C-2. Instruction Operands
Operand Description
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 lavel 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.