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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><HTML><HEAD><TITLE>80386 Programmer's Reference Manual -- Opcode SLDT</TITLE></HEAD><BODY><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="SHRD.htm"> SHRD Double Precision Shift Right</A><BR><B>next:</B><A HREF="SMSW.htm"> SMSW Store Machine Status Word</A><P><HR><P><H1>SLDT -- Store Local Descriptor Table Register</H1><PRE>Opcode Instruction Clocks Description0F 00 /0 SLDT r/m16 pm=2/2 Store LDTR to EA word</PRE><H2>Operation</H2><PRE>r/m16 := LDTR;</PRE><H2>Description</H2>SLDT stores the Local Descriptor Table Register (LDTR) in the two-byteregister or memory location indicated by the effective address operand.This register is a selector that points into the Global Descriptor Table.<P>SLDT is used only in operating system software. It is not used inapplication programs.<H2>Flags Affected</H2>None<H2>Protected Mode Exceptions</H2>#GP(0) if the result is in a nonwritable segment; #GP(0) for an illegalmemory operand effective address in the CS, DS, ES, FS, or GS segments;#SS(0) for an illegal address in the SS segment; #PF(fault-code) for a pagefault<H2>Real Address Mode Exceptions</H2>Interrupt 6; SLDT is not recognized in Real Address Mode<H2>Virtual 8086 Mode Exceptions</H2>Same exceptions as in Real Address Mode; #PF(fault-code) for a page fault<H2>Notes</H2>The operand-size attribute has no effect on the operation of theinstruction.<P><HR><P><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="SHRD.htm"> SHRD Double Precision Shift Right</A><BR><B>next:</B><A HREF="SMSW.htm"> SMSW Store Machine Status Word</A></BODY>⌨️ 快捷键说明
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