LSS - Load Far Pointer Instruction

The LSS instruction is used to load (read) a segment and address from memory into registers. The memory address most hold the Segment and offset address.

LSS loads the Offset address into the Register provided in the first operand, then the Segment address in to the SS Register.

This command has 3 parts, Instruction, Register, and a 32 bit memory address made up of 16 bit Segment number followed by an offset from the start of it.

Breakdown Description 16 bit Machine
Code

LSS ; Instruction 0F B2

SI ; Register number

[BX] ; A memory address from [BX]
; pointed to by BX

DataAddress ; A Label address 25 C0

LSS using a memory address

Assembly
Sample Description

MOV BX, 0x0345 ; Assign the memory address of the Pointer

or

MOV BX, DataAddress ; Assign the memory address of the Pointer

LSS SI, [BX] ; Call LSS

Alternate method

Assembly
Sample Description

MOV BX, 0x0005 ; Assign the memory address of the Pointer

PUSH BX

POP SS

MOV SI, DataAddress ; Assign the memory address of the Pointer
to a Register

Assembly
Sample Description 16 bit Machine
Code

LSS SI, [BX] ; Load SS and SP from the memory
; address in [BX] 0F B2 33

Breakdown	Description	16 bit Machine Code
LSS	; Instruction	0F B2
SI	; Register number
[BX]	; A memory address from [BX] ; pointed to by BX
DataAddress	; A Label address	25 C0

Assembly Sample	Description
MOV BX, 0x0345	; Assign the memory address of the Pointer
or
MOV BX, DataAddress	; Assign the memory address of the Pointer
LSS SI, [BX]	; Call LSS

Assembly Sample	Description
MOV BX, 0x0005	; Assign the memory address of the Pointer
PUSH BX
POP SS
MOV SI, DataAddress	; Assign the memory address of the Pointer to a Register