CLTS            Clear Task Switched Flag             Flags: Not altered

CLTS                                                 CPU: 286+ Priv

        Logic   Task Switched Flag in CR0 ← 0 (80386+)
                Task Switched Flag in MSW ← 0 (80286)

    CLTS clears the TS (Task Switched) flag in the CR0 register (the
    Machine Status Word of the 80286). This flag is set to 1 by the
    processor every time a task switch occurs. When the TS flag is
    used to manage processor extensions,
        - every execution of an ESC instruction is trapped if the TS
          flag is set
        - execution of a WAIT instruction is trapped if the MP (Math
          Present) and TS flags are both set

    Thus, if a task switch was made after an ESC instruction began,
    the Floating-Point Unit's context may need to be saved before a
    new ESC instruction can be issued. The fault handler saves the
    context and clears the TS flag.

    Note:       CLTS is used in systems programming and is a
                privileged instruction, running at privilege level
                zero only.


    Opcode      Format
    0F 06       CLTS


    Length and timing
    Operands    Bytes   8088    186     286     386     486     Pentium
    -            2                       2       5       7      10   NP