SIDT

SIDT 

Usage:  SIDT    dest                                  Modifies flags: none

Stores the Interrupt Descriptor Table (IDT) Register into the specified operand.

Store Descriptor Table Pointers

SGDT mem                      ; 0F 01 /0             [286,PRIV]

SIDT mem                      ; 0F 01 /1             [286,PRIV]

SLDT r/m16                    ; 0F 00 /0             [286,PRIV]

SGDT and SIDT both take a 6-byte memory area as an operand: they store the contents of the GDTR (global descriptor table register) or IDTR (interrupt descriptor table register) into that area as a 32-bit linear address and a 16-bit size limit from that area (in that order). These are the only instructions which directly use  addresses, rather than segment/offset pairs.

SLDT stores the segment selector corresponding to the LDT (local descriptor table) into the given operand.

See also LGDT, LIDT and LLDT.

EXAMPLE:

sidt Label