LTR             Load Task Register                   Flags: Not altered

LTR source                                           CPU: 286+ Priv

        Logic   TR ← source

    LTR loads the task register from the 16-bit source operand. The
    loaded task state segment (TSS) is marked busy. A task switch does
    not occur.


    LTR appears in operating system software; it is not used in
    application programs.


    Opcode      Format
    0F 00 /3    LTR  r/m16


    Length and timing
    Operands    Bytes   8088    186     286     386     486     Pentium
    r16          3                      17      23      20      10   NP
    mem16      3+d(0,2)                 19      27      20      10