			     - 67 -

			     3

         32 :
		     
	      
   ⥪ 80386  ०  ।࠭ ⨢ ﭨ
訡  ணࠬ  ७ ணࠬ஢.  
 ⮫쪮 ,    ⥬,  ᯮ  ।⢠
	    ,        ᫮,	祬   
室  ⥫쭮  		ਬ.  ⮬  
 饭       㭪樮஢  32-⮢ ०
,  ࠭   32-⮢  ⥬.
    	砥    ଠ	      ⮩	   
짮⥫-㯥ࢨ    ०      ਬ	ணࠬ
⠭  ⠪    ।⢥   	   ᪠
.
   뢠   쭮  訬  ﬨ.
ᬮਬ, 	    믮.	ᯮ    
। ᯥ祭 , ணࠬ  ᮧ  32-⮢
⥬  32-⮢ 樥,  32-⮢  ࠡ⪮  ,
࠭筮  㠫쭮        2-   ஢	 ⥬
ਮ⮢: 짮⥫  㯥ࢨ.
   ⢨⥫쭮:    뢠   80386  ॢ室
 ⥪ ᪮쪨 㣨 32-⮢ ஢,    
⥬,  ᠬ     ᥡ,   ᮤঠ   筮   ਠ   
ࠪ᪮   ० .  ,      
 ࠪ᪨  ᥩ 襩 ࠡ   32-⮢	०	
80386.
   騥 ⥬ ⫮  ᫥ :  㠫  ०
8086, ⭠ ⨧筮  ஥ ।⢠ ⫠ 
80386.

			     7
	       32- 
		 
  뢠 ⥬ 樨  32-ࠧ來  ०,  
   ࠡ뢠  32-⮢	  ᫮	  ०
. 32-⮢  ० ࠦ ⨭   80386.
 ᯥ稢 ࠧ  魮  魮 ।  
믮 ணࠬ, 祬   16-ࠧ來 ᭮ ०.
ਬ,  騩 ॣ  ᯮ짮    32-ࠧ來
᭮   ०   	   	      
⠡஢ १ 1, 2, 4,  8.
   ⢮, 祭   魮 32-ࠧ來 
   ᨫ쭮	砥   ࠧࠡ	 ணࠬ.   ନ஢
32-ࠧ來        ந室    㢥祭
६ ᯮ 樨.   ।⢠  ନ஢
 - ᭮ ⨦  80386    ࠢ    묨
㣨  ࠢ묨      	யࠬ.      ०
樨-⠡஢  	㢥稢  ६   믮
樨. ⥫ 䥪	  ⠪  ।⠢  쬠
⨬, ⠪    -  		.
 ਭ ࠢ⥫ ᯥ 㣨 32 -  ஢,
⬥⨬  䠪,  ய 68020  32000 ॡ 
 15 ६ 横     ।⠢    ᫮
 権.  15 横 80386 ᯮ,   ।,	2
1/2  権,  ᫥ .

			     - 68 -
		      32- 
		       
    32-⮢ ०  ⮩ ⢨⥫  
 㬬, ᨬ, 3- 32-ࠧ來 	:  ,
ᬥ饭    .  ⢨⥫  ,  ⮬,  
32-ࠧ來.  騩    32-ࠧ來  樨,   
⠡஢ ,   . 7.1.
   32-ࠧ來   祭	  ᬥ饭      ⥪饣
ᥣ . ⥫쭮,  ⢥  ண  蠣  
32-⮢   ନ஢   ,   	 	 ᥣ
᪫뢠  䥪⨢ ᮬ, ࠧ  32-⮢  
.	  	ᥣ         ਯ	-
8-⮢   ,    뢠	ࠪ⨪	
ᯮ  ᥣ. ਯ ᬮ७  . 8.
   32-ࠧ來 ० 믮 権 ᯥ稢 䨧᪮
		       32
᭮ ࠭⢮ 2   , 㣨 ᫮, 4 .  	-
אַ	  १    32-ࠧ來    樨,    饩
32-ࠧ來  .

	        
	     
    80386 ॠ ⭠ প 㠫쭮 	
   ࠭筮   樨.   ⥬   樨,   
  䥪⨢  ,   	      ࠭筮
樨.  ࠭筠	,   ᫨   㣮,   -   
࠭樨   ।騩    ᫥    	  ,
।騩	    .   32-⮢      
࠭筮 ࣠樥  . 7.2.    
㭪,  ࠭筠    ࠣ  孨	 20   
䥪⨢  ,  		      㣨
20-⮢묨 祭ﬨ.  ,  ᯮ  १  ⠡
࠭,  ।⠥,     㭪   ਣ쭮   20-⮢
祭.     ࠭筮  樥,  ⠪  
 易    ᥬ  ᮬ  ࠭樨  .  ࠭筠
  ஡  㤥  ࠧ`᭥    9  .    
䮪  32-ࠧ來 ନ஢ .

		   32-  
		    
   ப        ०   ᪠	ࠧ
樨 32-       䥪⨢  ,
ᯮ ⢮ ⨬ .   ०
ᯮ  ,   ६   ᫮ - 2  
    ⠪ ⠡஢  
⠡ ⥫ 1, 2, 4,  8.
   設⢮	      ०	     ॣ஢묨
ᢥ-묨.  ஬   ⮣,   80386   ᯥ稢   ०
ᢥ 樨; ,  ਬ ⮫쪮   ணࠬ
樨.   ⮩ ࠡ  ᠭ	  ந஢  
32-⮢  ०.

	       אַ ॣ஢ 樨.
	       
   אַ ॣ஢ ० 砥,   ࠭  ᯮ	
  8 ॣ஢ 饣 祭,      6	ॣ஢
ᥣ,     ॣ஢ ⥬.

			     - 69 -
			       31	      15	     0
			       Ŀ
        ॣ:        	    	     
			       
						 
	  31	       15	       0	 
	  Ŀ	 
	   - - -	       	    
饭:  ७   .        +	    32
	  	    2
						 
	  31				0	 
	  Ŀ	 
 					    
ॣ:  	     		+	     32
	     	    2
					    	 
					    	 
			Ŀ   	 
			 ⠡	   	 
			 ⥫		 	    蠣 1
				 
			 1, 2, 4,  8 	 
						  
						     
						 
						/
					       /
					      /
					     /
					    /஢ઠ  -
					   /࠭ ᥣ- 
					  /		
					    ࠢ /  ᪫-
					     㯠  / 祭
						     /	12  13
						    /
						   /
						  /  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 	   蠣 2
						 
						   
						    =
						 
						   
						   
						 
			       31	      15 	     0
			       Ŀ
᪨ :	             ᪨ 	     
			       
    .7.1 ᫥ 32- ࠧ來   饭
	    ० ( ࠭筮 樨).

			     - 70 -
			       31	      15	     0
			       Ŀ
        ॣ:        	    	     
			       
	  31	       15	       0	 
	  Ŀ	 
	   - - -	       	    
饭:  ७   .        +	    32
	  	    2
	  31				0	 
	  Ŀ	 
 					    
ॣ:  	     		+	     32
	     	    2
					    	 
			Ŀ   	 
			 ⠡	   	 
			 ⥫		 	    蠣 1
				 
			 1, 2, 4,  8 	 
						  
						     
						 
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					 /		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /
						/  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 	    蠣 2
						 
						   
						    =
						 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
				31	  12 11  	     0
				----------------|
				࠭ 	   ᬥ饭 |
				 ࠭   	   ࠭|
				--------------
						 
						   
						   
						 	  蠣 3
						 
			       31	      15 	     0
			       Ŀ
᪨ :	             ᪨ 	     
			       
     .7.2 ᫥ 32- ࠧ來   ࠭筮
	     ࣠樥  饭 ०.

			     - 71 -
		    騬 ॣ஬.
		    
   ࠭  饬 ॣ ।  R/M.  ᯮ㥬
ࠧ ॣ   8, 16,  32 ,  ᨬ  
ࠧ஢   ࠭ 樨.
   ᫥:		  EA = ॣ
   ⠪ ᥬ:  genreg
   :		  ॣ, r/m
   MOD: 		  00
				  31		 15	7	0
				  Ŀ
騩 ॣ:	 ॣ 	      ࠭		
				  
					 騩 ॣ

		  ॣ஬ ᥣ.
		  
࠭  ॣ ᥣ ।    ॣ.  ⨬,
   ०  ᯮ  MOD R/M.    
ᯮ	  樨  SREG	஥  㦠  
  ॣ ᥣ.
   ᫥:		       EA = ॣᥣ
   ⠪ ᥬ:        segreg
   ॣ:		       SREG
					    15		       0
					    Ŀ
 : ॣᥣ 	  ࠭      
					    

	        ।⢥ 樨.
		
   ।⢥  	।  ⥬,     ࠭
祭    ,    ⠪.	 	 ।⢥
樨    ।  ⮫쪮  ࠭-筨,      
࠭-ਥ. ।⢥  ࠭      ⮬,
᫮	    ᫮.    ।⢥	樨
।    ⮬  MOD  R/M;  ୥,  ।   
権    ।  ᯮ짮	 ।⢥
樨  	࠭-筨.      ⠪   ⨯,
⮬,    MOD R/M  ५  ࠭-
ਥ.

			     - 72 -
   ᫥:		     EA = # <>
   ⠪ ᥬ:     data
    樨:	     ।  樨, 
			     ।騩   
			     ᯮ ।⢥ 
			       31		15	7	0
			       Ŀ
७ 樨:  -७ - 	
			       		.	
			       
					     ࠭

	       - 
	       
    ० 樨 ।,    ࠭  -    ᥣ
,      ᮤঠ       ᪮쪨	ॣ஢
ᯮ    ᫥  䥪⨢    ࠭	
। ᥣ. ⥬ ਡ   ᥣ  
ନ஢ 32- ⭮   ࠭.

	     ᢥ   ॣ஬.
	      
    騩 ॣ ஬ EBP  㦨 	ॣ஬
࠭ .
᫥:		    EA = (ॣ)
⠪ ᥬ:	    (genreg)
MOD:			    00
ॣ:		    EAX, EBX, ECX, EDX, ESI, EDI, ESP
			       31	      15	     0
			       Ŀ
        ॣ:        	    	     
			       
						 
						  
						     
						/
					      /஢ઠ  -
					    /࠭ ᥣ-  
					  /		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 	   蠣 2
						 
						   
						   
						 
			       31	      15 	     0
			       Ŀ
᪨ :	       	 ࠭	     
			       

			     - 73 -
		      ᢥ 
	   ।⢮  ॣ  ᬥ饭.
	    
      騩   ॣ      ᯮ짮   ,
ᮤঠ騩 ,  ஬  32-⭮  ᬥ饭, 
8-⭮    ᬥ饭     -७.	㬬	ନ
䥪⨢  ࠭ .    ᥣ  ⥬
  32-⭮    ࠭.
᫥:		    EA = (ॣ)
⠪ ᥬ:	    (genreg)
MOD:			    01,10
ॣ:		    EAX, EBX, ECX, EDX, ESI, EDI, EBP, ESP
			       31	      15	     0
			       Ŀ
        ॣ:        	    	     
			       
	  31	       15	7      0
	  Ŀ	 
	  		              	    
饭:   -७         +	    32
	  	    2
						 
						  
						     
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					/		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 	   蠣 2
						 
						   
						   
			       31	      15 	     0
			       Ŀ
᪨ :	             ࠭		     
			       

		ᢥ  ।⢮
		  ᭮ ॣ஢.
		 
        ॣ஢  	ᯮ짮    ⢥
    ᭮  ॣ஢,  ᮤঠ  ,  
᪫뢠    ନ஢  䥪⨢		 ࠭
.  ॣ   ⠡஢ 1, 2,  4,  
8. ⥬ ਡ     ᥣ	  ନ஢
32-⭮    ࠭.

			     - 74 -
᫥:		    EA = (ॣ) + (ॣ * ⠡)
 ⠪ ᥬ:	     (genreg) + (genreg * scale)
 MOD:			     00
 ॣ:	     EAX, EBX, ECX, EDX, ESI, EDI, ESP
 ॣ:	     EAX, EBX, ECX, EDX, ESI, EDI, EBP
			       31	      15	     0
			       Ŀ
        ॣ:        	    	     
			       
	  31				0
	  Ŀ	 
   騩 ॣ, ஬		    
ॣ:  	   ESP			+	     32
	     	    2
					    	 
			Ŀ   	 
			 ⠡	   	 
			 ⥫		 	    蠣 1
				 
			 1, 2, 4,  8 	 
						 
						  
						     
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					/		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 	   蠣 2
						 
						   
						   
						 
			       31	      15 	     0
			       Ŀ
  : 	       	 ࠭	     
			       

	   ᢥ  ।⢮ 
	    
	       ᭮ ॣ  ᬥ饭.
	       
        ॣ஢  	ᯮ짮    ⢥
  ᭮ ॣ஢, ᮤ ,   ⥬
ਡ 	32-⭮   ᬥ饭      ७
8-⭮  ᬥ饭. 㬬 ࠧ 䥪⨢  ࠭	
. ⥬ ਡ   ᥣ  ࠧ
32-⭮  .

			     - 75 -
᫥:		    EA = (ॣ) + (ॣ * ⠡) +
				  + -७(ᬥ饭)
 ⠪ ᥬ:	     (ॣ) + (ॣ) + ⠭
 MOD:			     01, 10
 ॣ:	     EAX, EBX, ECX, EDX, ESI, EDI, EBP, ESP
 ॣ:	     EAX, EBX, ECX, EDX, ESI, EDI, EBP
			       31	      15	     0
			       Ŀ
        ॣ:        	    	     
			       
	  31		       7       0	 
	  Ŀ	 
	  		              	    
饭:   -७         +	    32
	  	    2
						 
	  31				0	 
	  Ŀ	 
 					    
ॣ:  	     		+	     32
	     	    2
					    	 
			Ŀ   	 
			 ⠡	   	 
			 ⥫		 	    蠣 1
				 
			 1, 2, 4,  8 	 
						 
						  
						     
						 
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					/		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						/  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 	   蠣 2
						 
						   
						   
						 
			       31	      15 	     0
			       Ŀ
  : 	       	 ࠭	     
			       

			     - 76 -
			   饭.
			    
   䥪⨢  ।  ᮫⭮ 32-⮢ ᬥ饭
⭮⥫쭮  ᥣ.  稭  ᬥ饭      ᠬ
樨.
	  31	       15	       0
	  Ŀ
饭: 	ᬥ饭	       Ŀ
	  	 
						 
						  
						     
						 
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
							
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 	   蠣 2
						 
						   
						   
			       31	      15 	     0
			       Ŀ
  : 	       	 ࠭	     
			       

	      ।६⭠ ᢥ 
	       
		      ESP ॣ.
		     
   	権  PUSH,  PUSHA,  CALL     INTn   ॣ   ESP
ᯮ  ॣ, ᮤঠ騩    ࠭    .
। ᯮ짮 ॣ ESP  ᮤন  㬥蠥  
ࠧ   ࠭, ᨬ  ⥪.
᫥:		    ESP = ESP -  ࠭
			    EA = ESP
⠪ ᥬ:	    㧠   
			     PUSH, PUSHA, CALL,  INT n
 ॣ:	    ESP

			     - 77 -
			   31		  15		 0
			   Ŀ
ॣ ESP:	㪠⥫ ⥪ 	 
			   
					     	      
					     	      
ࠧ ࠭  -	      
					     
						 
						  
						     
						 
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					/		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						   
						   
			       31	      15 	     0
			       Ŀ
᪨ :	       	 ࠭	     
			       

	      ⨭६⭠ ᢥ 
	       
		      ॣ ESP.
		     
    権 POP, POPA, RET  IRET ॣ ESP  ᯮ
 ॣ, ᮤঠ騩  ࠭ .	᫥  ⮣   
ॣ ESP ᯮ짮,  ᮤন  㢥稢	  
  ࠭, 祭  ⥪.
᫥:		    EA = ESP
			    ESP = ESP + ࠧ ࠭
⠪ ᥬ:	    㧠   
			     POP, POPA, RET,  IRET
 ॣ:	    ESP

			     - 78 -
			   31		  15		 0
			   Ŀ
ॣ ESP:	㪠⥫ ⥪ 	 
			   
					     	      
					     	      
ࠧ ࠭  +	      
					     	      
					     
						 
						  
						     
						 
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					/		 
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
	   31			       0
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						   
						   
			       31	      15 	     0
			       Ŀ
᪨ :	       	 ࠭	     
			       

		     
		    
   ᢥ  権 JMP    CALL  ᯮ	ᢥ
  .     ᢥ	樨      
 ᯮ짮 㤮 ॣ஢ ᢥ  ०,
᫥  ।饬 ࠧ.
   ᢥ   JMP  CALL   ᢥ  饭	
  । ணࠬ  ᥣ  㭪樮	᫥騬
ࠧ:   		 ᪫뢠	   ࠧ
32-⭮ ᬥ饭  ⥬ ਡ     ᥣ
 ࠧ 32-⭮  .     
ᮤন  32-  䥪⨢    樨-ਥ	
। ⥪饣 ᥣ.
   ᢥ 		  JMP    CALL  	ᢥ
饭        㣮  ணࠬ  ᥣ  ந室
᫥騬 ࠧ:   ᪫뢠  ࠧ
32-⭮ ᬥ饭  ⥬ ਡ     ᥣ
 ࠧ 32-⭮  .     
ᮤন            (32-    䥪⨢    
樨-ਥ    16-⮢  ᥫ	   ணࠬ
ᥣ-ਥ).    48        㦥	
ᯮ짮  맮  樨-ਥ.

			     - 79 -
   ᫥:		 EA: [(.ॣ.) + (.ॣ. ; ⠡) +
			      + -७(ᬥ饭)]
   ⠪ ᥬ: 㪠⥫(.ॣ.) + (.ॣ. ;
			  ⠡) + .
   .:		 00, 01, 10
    ॣ:	 EAX, EBX, ECX, EDX, ESI, EDI, EBP, ESP
    ॣ:	 EAX, EBX, ECX, EDX, ESI, EDI, EBP
			       31	      15	     0
			       Ŀ
        ॣ:             騩 ॣ      
			       
	  31	       15	       0	 
	  Ŀ	 
	   - - -	       	    
饭:  ७   .        +	    32
	  	    2
						 
	  31				0	 
	  Ŀ	 
 					    
ॣ:   騩 ॣ ஬ ESP+	     32
	     	    2
					    	 
			Ŀ   	 
			 ⠡	   	 
			 ⥫		 
				 
			 1, 2, 4,  8 	 
						   
						   
			       31	      15 	     0
			       Ŀ
  : 	       	 ࠭	     
			       
						 
						  
						     
						 
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					 /		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
	   31			       0	 
  Ŀ	 
	   			       	    
ᥣ   	   ᥣ        +	    32
	   			       	    2
	   	 
						 
						   
						   
			       31	      15 	     0
			       Ŀ
  : 	         ᢥ       
			       

			     - 80 -		 
						/
					      /
					    /஢ઠ  -
					  /࠭ ᥣ-	
					 /		
					    ࠢ /  ᪫-
					    㯠  /	祭
						   /  12  13
						 /  襭
		 	    			   	      
					     
			       31	      15 	     0
			       Ŀ
			       饭  ᢥ      
  : 	              	     
			       
	   31			       0	 
  Ŀ	 
	   			       	    
ணࠬ  ணࠬ ᥣ +	    32
ᥣ   			       	    2
	   	 
						 	   蠣 2
						 
						   
						   
			       31	      15 	     0
			       Ŀ
 		             - ਥ      
			       

	     32-  
	     
   32-  ० ஢   MOD R/M  
S-I-B (⠡--).  32-⭮ 樨,    ன
⢮  ⮫쪮 ᬥ饭,        ॣ	
ᬥ饭, ॡ  ஢  ⮫쪮    MOD	R/M.  
32-⭮ 樨,  ன ⢮   	
ॣ,  ஢ ॡ ⠪  S-I-B.
    ࠭-筨, ⠪  ࠭-ਥ - 騥 ॣ.
ன ࠭,  ⮬ ,    騬 ॣ஬, ⠪	
  .  ᫨  ன  ࠭  -    ,  
 ० ।.  ।  ࠭  
MOD R/M ᮤন  .

		    ஢ MOD R/M.
		    
     MOD R/M ᫥   ⮬()	    権
80386,  ࠦ  .7.3. 	MOD  R/M  ࠧ  	3
,    㭪.	塨⭮    REG  ।
ॣ஢ ࠭. 塨⭮  MOD ।,   
ன ࠭ ⠪ ॣ஢; ᫨ - ,   塨⭮  
R/M  ।  ன   ࠭.   ᫨,   ,      MOD
ᢨ⥫,  ࠭  ,   MOD  R/M, ,
㪠뢠  ०,   㦭  짮.  ,
᫨  MOD 㪠뢠  ࠭      R/M  ᮤন
100,    ᫥騩    -  S-I-B,  	㪠뢠   ०
樨.

			     - 81 -
       0	      1
     ()	    (MOD R/M)
Ŀ
 * * * * * * * *

		   
		  REG  MOD  R/M
		  
	      ࠭ 1 ࠭ 2
   .7.3. 宯࠭   ⮬ MOD R/M.

		     騩  S-I-B
		      
   	஢    ᫮    ,     
ᯮ  ॣ  ⠡஢,  ⮬  MOD
R/M  ᫥     S-I-B   (⠡--).      
ࠧ  3 .  ࠦ  .7.4: ⠡  (SS),
	(INDEX)      (BASE).    SS  ᮤন  ⠡
⥫ 1, 2, 4,  8  ᭮ . 騩  ॣ
( ॣ ஬ ESP)  ।      INDEX.    BASE
㪠뢠  騩 ॣ (  ᯮ ᬥ饭  -  
 ॣ ஬ EBP) ᯮ㥬  ⢥ .
       0	      1	      2
     ()	    (MOD R/M)	    (S-I-B)
Ŀ
 * * * * * * * *	   1 0 0

		  	   
		  REG  MOD	 SS  INDEX  BASE
		  
	      ࠭ 1       ࠭ 2
   .7.4. 宯࠭   ⮬ MOD R/M  -I-B.

	  32-⭠ ⠡ ஢ MOD R/M  S-I-B.
	   
    7.1. ।  MOD R/M  S-I-B,     ᥡ
 32- ० 樨 .	⨬,      騥
ॣ   ᯮ       32-    ०    樨.
(㧠,  	ESP  ᯮ짮    樨   
ﬨ PUSH, POP,  PUSHA,  POPA,	CALL    INT  n).饭
 ।  32-⭮ 祭   8-⭮ 祭
(-७  32 ).
        7.1 ।  REG MOD R/M  S-I-B
		     32-⭮ 樨

       0	      1
     ()	    (MOD R/M)
Ŀ
 * * * * * * * *

		   
		  REG  MOD  R/M
		  
	      ࠭ 1 ࠭ 2

			     - 82 -
REG    ࠭ 1 =	    MOD   R/M	  ࠭ 2 =

000   ॣ EAX/AX/AL     00	  000	  DS:[EAX]
001   ॣ ECX/CX/CL     00	  001	  DS:[ECX]
010   ॣ EDX/DX/DL     00	  010	  DS:[EDX]
011   ॣ EBX/BX/BL     00	  011	  DS:[EBX]
100   ॣ ESP/SP/AH
101   ॣ EBP/BP/CH     00	  101	  DS:[d32]
110   ॣ ESI/SI/DH     00	  110	  DS:[ESI]
111   ॣ EDI/DI/BH     00	  111	  DS:[EDI]

			    01	  000	  DS:[EAX + d8]
			    01	  001	  DS:[ECX + d8]
			    01	  010	  DS:[EDX + d8]
			    01	  011	  DS:[EBX + d8]
			    01	  101	  DS:[EBP + d8]
			    01	  110	  DS:[ESI + d8]
			    01	  111	  DS:[EDI + d8]
			    
			    10	  000	  DS:[EAX + d32]
			    10	  001	  DS:[ECX + d32]
			    10	  010	  DS:[EDX + d32]
			    10	  011	  DS:[EBX + d32]
			    10	  101	  DS:[EBP + d32]
			    10	  110	  DS:[ESI + d32]
			    10	  111	  DS:[EDI + d32]
			    
			    10	  000	 ॣ EAX/AX/AL
			    10	  001	 ॣ ECX/CX/CL
			    10	  010	 ॣ EDX/DX/DL
			    10	  011	 ॣ EBX/BX/BL
				  100	 ॣ ESP/SP/AH
			    10	  101	 ॣ EBP/BP/CH
			    10	  110	 ॣ ESI/SI/DH
			    10	  111	 ॣ EDI/DI/BH
			   

			     - 83 -
       0	      1	      2
     ()	    (MOD R/M)	    (S-I-B)
Ŀ
 * * * * * * * *	   1 0 0

		  	   
		  REG  MOD	 SS  INDEX  BASE
		  
	      ࠭ 1       ࠭ 2
REG  ࠭ 1 =      MOD SS INDEX BASE ࠭ 2 =

000 ॣ EAX/AX/AL 00  ss  iii   000  DS:[EAX+(ss*iii)]
001 ॣ ECX/CX/CL 00  ss  iii   001  DS:[ECX+(ss*iii)]
010 ॣ EDX/DX/DL 00  ss  iii   010  DS:[EDX+(ss*iii)]
011 ॣ EBX/BX/BL 00  ss  iii   011  DS:[EBX+(ss*iii)]
100 ॣ ESP/SP/AH 00  ss  iii   100  SS:[ESP+(ss*iii)]
101 ॣ EBP/BP/CH 00  ss  iii   101  DS:[d32+(ss*iii)]
110 ॣ ESI/SI/DH 00  ss  iii   110  DS:[ESI+(ss*iii)]
111 ॣ EDI/DI/BH 00  ss  iii   111  DS:[EDI+(ss*iii)]

		      01  ss  iii   000  DS:[EAX+(ss*iii)+d8]
		      01  ss  iii   001  DS:[ECX+(ss*iii)+d8]
		      01  ss  iii   010  DS:[EDX+(ss*iii)+d8]
		      01  ss  iii   011  DS:[EBX+(ss*iii)+d8]
			  ss  iii   100  SS:[ESP+(ss*iii)+d8]
		      01  ss  iii   101  DS:[EBP+(ss*iii)+d8]
		      01  ss  iii   110  DS:[ESI+(ss*iii)+d8]
		      01  ss  iii   111  DS:[EDI+(ss*iii)+d8]
		      
		      10  ss  iii   000  DS:[EAX+(ss*iii)+d32]
		      10  ss  iii   001  DS:[ECX+(ss*iii)+d32]
		      10  ss  iii   010  DS:[EDX+(ss*iii)+d32]
		      10  ss  iii   011  DS:[EBX+(ss*iii)+d32]
			  ss  iii   100  SS:[ESP+(ss*iii)+d32]
		      10  ss  iii   101  DS:[EBP+(ss*iii)+d32]
		      10  ss  iii   110  DS:[ESI+(ss*iii)+d32]
		      10  ss  iii   111  DS:[EDI+(ss*iii)+d32]
		      
		      11        000 ॣ EAX/AX/AL
		      11        001 ॣ ECX/CX/CL
		      11        010 ॣ EDX/DX/DL
		      11        011 ॣ EBX/BX/BL
		      11        100 ॣ ESP/SP/AH
		      11        101 ॣ EBP/BP/CH
		      11        110 ॣ ESI/SI/DH
		      11        111 ॣ EDI/DI/BH
Ŀ    	     Ŀ
  ⠡	  SS     	     INDEX ॣ
  ⥫	  ss     	      iii 		      
Ĵ    	     Ĵ
       1	  00     	      000 	   EAX	      
       2	  01     	      001 	   ECX	      
       4	  10 	 010 	   EDX	      
       8	  11  	       011 	   EBX	      
 	       100   .ॣ࠳
				       101 	   EBP	      
				       110 	   ESI	      
				       111 	   EDI	      
				      

			     - 84 -
			         8

	   
	 
		        
		       
    ⮩   ଠ,	  㦭	  
⥪ 80386     ०    ஥஢  
ᯮ짮 32-ࠧ來 ⥬ 80386  ஢  
 짮⥫/㯥ࢨ.
   	墠뢠  ᯮ짮  80386    32-⭮	०	
᭮  , ᯮ饩 ⮫쪮 2   4-	
஢   ਢ஢.      ਢ஢	
訩  ஢  -  ᯮ짮    ⮩   ஢
⥬.    2	 ஬	  ஢      ਢ஢
.
     ਢ஢   ஢  砥   樮
⥬.   ⠪,	  뢠	஢  㯥ࢨ.  
砥  ᥡ  ࠢ ⥬ - ணࠬ  㯥ࢨ.
訩 ஢ 㯥  ணࠬ 짮⥫.   ஢
ᯮ  ணࠬ,  ஥஢묨    ᯥ᪨
ਬ,  ⠪     	 ,   ,	⥪⮢
,  <spreadsheet>. ⥪  ०    80386
頥 ஢ 㯥ࢨ  ﭨ   ணࠬ  訡
஢ 짮⥫,   ७.  ᭮  ࠭⢮
祭 ࠬ   㯥ࢨ, 饭    אַ
㯠 ⥭/  ணࠬ 짮⥫.
    뢠    饭	०	᭮  易	
஢ﬨ  ਢ஢.     ।  
	஢	ਢ஢     㣮.  ,	 筮,
ᯥ稢  㭪  ⭮ 뢠    ,
  筮  ⠪     ࠢ   ணࠬ묨   뢠ﬨ.
ᯮ ணࠬ 뢠   堭 맮,	  	
-ਥ஢  ਬ,  㯥ࢨ  ᮤন	㦥
ணࠬ,  室     ஢	짮⥫.	㦥
ணࠬ, ᪠ ﬨ ணࠬ  뢠,  
믮 ⥬ 㭪樨, ⠪ 	਩  /뢮,
५   .. ணࠬ	ᯥ祭  짮⥫
 ⮩    㦥 ணࠬ 맮   
뢠 INT n. ஬ ⮣, ᯮ짮    뢠
  ஢ 㯥ࢨ ࠭祭 祪 室	
㯥ࢨ ⮫쪮 ᫥묨  ⠡ 뢠.
   : ⨫ 맮, ᬮ७    14  
   堭 裡  짮⥫-,  ⠪  
  ࠭祭 ⢮     ࠬ஢
 ⥪ 㯥ࢨ.

	       
	    
   饭,    ᭮,  ॡ    ᥣ⠬	
⮩  32-⭮  饭	⥬.    ,  
堭  ࠭筮        ⠪   ⥬   ᯥ稢
室  ணࠬ   㯥ࢨ.
    祭  饭 ⥬ 堭 ࠭筮 
ࠧ  ᭮ ࠭⢮    짮⥫
  㯥ࢨ.  ࠭ ⨢    
  ᠭ  ⥬  ࠭筮         	 ࠭
짮⥫,	  ࠭ 㯥ࢨ (.  9).

			     - 85 -
   ⥬ ࠭筮   ⠪ ᯥ稢 
 ࣠樨 㠫쭮 . ணࠬ  짮⥫  
筮  ࠧ    ᪥,    ⥬  ࠭筮  
஧筠   (.  9).

	    32-  
	    
		    
		  
     ० ᥣ⠬    ਡ:
ਢ஢,   , ࠧ  	ᯮ짮.	
⮩    ⥬  㦭  ᭠  ਡ⠬  쬠
让  ᥣ⮢, 䠪᪨ 5.  ஢  ⥬
	ॡ  ⥪    ०  ॠ
।⢮ 5 ᥣ⮢ .  5 ᥣ⮢:
   .  㯥ࢨ  ணࠬ  ᥣ     ணࠬ  ஢
㯥ࢨ.
   .  㯥ࢨ  ᥣ		    ⥪      
㯥ࢨ.
   . 짮⥫᪨ ணࠬ  ᥣ    ணࠬ  ஢
짮⥫.
   .  짮⥫᪨  ᥣ      ⥪      
짮⥫.
   .   ﭨ      ࠭  㪠⥫  ⥪
㯥ࢨ,  믮 ணࠬ  ஢ 짮⥫.
    ᥣ ⢫ ॡ  ०:
   1.      ⠭  ஢   ਢ஢
,  ࠩ , 1 ணࠬ ᥣ.    襬  砥
⨬  ஢ﬨ  뢠  ஢	㯥ࢨ      ஢
짮⥫, ॡ騥 2 ணࠬ ᥣ.
   2.      ⠭  ஢   ਢ஢
,  ࠩ , 1  ⥪  ᥣ.    襬  砥
  ᮧ 2 ᥣ    ࠭  ⥪.  
 ᥣ  ⠪ ᯮ짮  㣨 .
   3.   믮 ணࠬ  ஢ 짮⥫,
    ࠭     砫쭮	   㪠⥫	 ⥪	   ஢
ਢ஢ 㯥ࢨ 㦥 ᥣ ﭨ .
  4-  ᫥  ᥣ⮢  ᫥  `  祭
							 32
訬  稭. ᪨  ᫥ `  2   
(4  ),  ⠪  ⮡    墠뢠  32-⭮	 
᭮ ࠭⢮,      .  8.1.  ⠭
 ᥣ⮢     ࠭祭  	樨
      4-  ᥣ⮢,  ᫥  	
᪫砥     室   	 ணࠬ   짮⥫
ॣ㦠  ॣ  ᥣ      ᢮  믮.
讥  ᭮  ࠭⢮  ᥣ⮢   ᯥ稢
"" - 4- ,  ன ᯮ  ணࠬ
짮⥫.
    ﭨ  - ᯥ樠 ᥣ ࠧ஬  ஢
104 ,  ᠭ   .    . ﭨ  
  ᯮ      	4-  ⭮	
᭮ ࠭⢠,    .8.1.

			     - 86 -
    Ŀ
    Ŀ
    Ŀ
     		        
        4 .     FFFFFFFF
     		        	     16
    (। = FFFFFFFF  )    
     		 16     
     		        
    .. 	.	     ..   
    .. 	.	     ..   
    .. 	.	     ..   
    			          
     		         4-⭮  ᭮
     		         ࠭⢮, 㯭 
     ᥣ A, B, C, D      32- 権
     		        
     		        
     		        
           
       00000000   .      00000000
     	       16       	     16
     		        
    ٳ   
    ٳ
    
	  . 8.1  ࠧ饭 ᥣ⮢ A, B, C, D
	     32-⭮ ⮩  ⥬

           
       
    ० REAL ( 4 -  6)  ਯ஢  ᥣ⮢  .	
० REAL  ᥣ⮢   ⮫쪮 1  ਡ  -  
. ⬥⨬, ,     ० REAL  
אַ 㭪樥 祭 ᥫ ᥣ,  㬭    16
(ᤢ⮣    4    ).      ⠪,  ⠪
ࠧ,  뢠 ᥣ   ० REAL.
   ,   ० ᥣ    ᫮.  
 ᪮쪨 ਡ⠬: 㠫  ᮬ 
32-⭮  ᭮ ࠭⢥ ( אַ,    㭪
 祭 ᥫ), 㠫 ࠧ஬  㠫묨
ࠢ 㯠.   ਡ	ᮤঠ    ᯥ樠쭮   ⨯
, ਯ ᥣ, ᯮ 80386    
०.
     ० ᥣ ᠭ ᫥ ਡ⮢ 
ਯ,   ਯ  ᥣ,   㯯஢
ਯ஢   ࠧ   १⭮ ⠡,
뢠    쭮  ਯ  (GDT).	᪮쪮
ਯ஢  GDT ᠭ   ⮩ . 㣨  ਯ
 ⠡,  㦭  ⮩ 32-⭮ ⥬,  㦤	
.14.

		  ଠ ਯ ᥣ.
		   
    ਯ ⮨ ஢   8  	-  2-	32-
 ᫮,	,  ᮤন  	⥫  ଠ,
⭮   ᥣ :  	,	ࠧ	
ࠢ  㯠.   .8.2   ࠦ	 ਯ   ணࠬ
ᥣ,  .8.3 - ਯ ᥣ .    ""  
 㭪 ࠦ  ਯ 楫.      ""
襢 ଠ   ;   "" -  ଠ
 ࠭    "" - ଠ  ࠢ 㯠.

			     - 87 -
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G D O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 1 C R A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
    . 騩  32-⭮ ਯ ணࠬ ᥣ
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G D O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 1 C R A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
	    . ଠ    ᥣ
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G D O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 1 C R A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
	       . ଠ  ࠭ ᥣ
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G D O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 1 C R A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
	     . ଠ  ࠢ 㯠 ᥣ
  . 8.2 ਯ  32-⭮ ணࠬ ᥣ.

			     - 88 -
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G B O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 0 E W A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
      . 騩  32-⭮ ਯ ᥣ 
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G B O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 1 E W A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
	    . ଠ    ᥣ
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G B O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 1 E W A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
	       . ଠ  ࠭ ᥣ
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

  ᥣ 31...24 G B O AVL࠭ ᥣ 19...16

       ᥣ 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 1 1 E W A   ᥣ 23...16 
		Ĵ
		         ࠭ ᥣ 15...0      	
		
	     .ଠ  ࠢ 㯠 ᥣ
    . 8.3 ਯ  32-⭮ ᥣ .

    ਢ । ਯ :
 1.   ᥣ -  32-⭮ 祭, ।饥
      ᥣ   ᭮ ࠭⢥.
 2.  ࠭  ᥣ	-  	 20-⭮   ,   ।饥
 襥    ᬥ饭  ᥣ. ࠭   ࠦ 
       ࠭ (4096 ),  ஫  ⮬	G
 ਯ.

			     - 89 -
 3. G (ࠤ஢) 㪠뢠,  ࠭ ᥣ   
   ,   ࠭.
 4. D () 㪠뢠  ᥣ  32-  (D=1)  
 16-  (D=0).  ᫨   D=1,      ଠ	ਯ   
 ᥣ⮢ ணࠬ   ⠪,    .  8.2	
 8.3, ᮮ⢥⢥. ᫨  D=0,    ଠ  ਯ  ⠪,
  ᯮ 80286      ०    16-⭮
 ᥣ,  ࠧ`᭥  . 14.  16-	  ᯥ稢
 32- ࠧ ࠭   32-  ࠧ    
 㬮砭 (ᮢ⨬  80286  ० ).
 5.  E	(ࠢ  ࠭),  ⮫쪮   	ᥣ⮢
 ,-    㪠뢥,   ᯮ	ᥣ      
 ᮢ      ᥣ    ࠭,    E=0,
      ᨬ쭮  ᬥ饭  	࠭,      
 (E=1).    設⢮ ᥣ⮢ , ⠪  B  D   .
         ⮬  0 (). 쪮 	ᥣ  ,
 ᯮ饣  ࠭ ⥪ ,      ,
  ࠢ  訬 ᠬ    㬥  	
 ⮬  1 ().
 6. B (让) ⮫쪮  ᥣ⮢ 	  뢠 ⮫쪮 ᫨
 ᥣ ࠥ , 砥	  ᨬ쭮 ᬥ饭 
 ᥣ. ᨬ쭮 ᬥ饭    饣  ᥣ
      㪠       FFFFFFFF	  (B=1)    
					      16
 0000FFFF    (B=0).  B	  ⢥砥         ᥣ   ,
	 16
 騥 .
 7. ࠢ 㯠 -  ᪮쪮 , 㪠뢠  ࠧ襭
        㯠	     ᥣ,	        ॡ
 ਢ஢  ஢        ⥭.  ᫨
 ᯮ㥬  ࠭		ᥣ  ᯮ  饭
  㯠,   80386  ࠡ뢠  ᪫⥫  
    饩   	(᪫⥫쭠        13)    
 ᪫⥫   ⥪ (᪫⥫쭠    12),
 ᫨ ࠡ  ⥪ ᥣ⮬.
7. P (।⠢) 㪠뢠,   ᥣ   䨧᪮
  (P=1),   (P=0).    । 
   ᥣ⮢,    ,  ,  ⮫쪮	
 筮    	  ६    䨧᪮
 . ⥬  ࠭筮        ᥣ
 㦠 ࠭筮;  ᫨ P=1 ᥣ    㦭  
 楫  .
7.  DPL  (஢  ਢ஢   ਯ)	㪠뢠
 ஢ ਢ஢,   ᫮ 0, 1, 2,  3 ᫥騬
 ࠧ
   DPL		    ᪨
  
     00   ஢ 0 ᠬ ਢ஢ (㯥ࢨ, )
  
     01   ஢ 1
  
     10   ஢ 2
  
     11   ஢ 3  訩 ஢ (짮⥫)
 DPL ⥪饣  ணࠬ  ᥣ  㪠뢠  ⥪騩  ஢
 ਢ஢  (CPL)  樨.	ਬ,  ᫨ 
 ࠡ뢠 ணࠬ ᥣ  DPL 00,   ࠡ⠥  CPL
 0 - ᠬ ਢ஢ ஢ - ஢ 㯥ࢨ.
7. A (㯭) - 㪠뢠   ᥣ 㯥 (A=1)  
 (A=0)  ⮣ ,    ਯ   襭 
0. ᫨  ⥬ ந室   ᥣ⠬	  	

			     - 90 -
᪮,      	 	 ᯮ짮	   ।
ᯮ짮 ᥣ.   ⥬  ࠭栬
 ᯮ ᥣ樨     ⠪ ⥬  
।⠢.
7. R (㯭  ⥭), ⮫쪮     ᥣ	-
㪠뢠, 㯥  ᥣ  ⥭ (R=1)      (R=0).
ணࠬ ᥣ, 筮, ᥣ 믮. ਡ  R  
ᯥ ᢥ塥᭮ 饭 ணࠬ  ᯥ祭
  ᥣ, ᯮ饣 䨪 ⢥থ CS (. .
        ⠡ 2.6)
7.  C	(ᯮᠡ),	⮫쪮	  	ᥣ,
- 㪠뢠   CPL,   ᥣ  맢    ஢
襩 ਢ஢  (C=0)   (C=1).  ᫨  C=1,  
ணࠬ  ᥣ   뢠   ᯮᠡ   ணࠬ
ᥣ⮬, .. 祭 CPL  ,  뢠 
ᥣ. ᯮᠡ ணࠬ ᥣ	祭  㯮ॡ
    ணࠬ,    맢  ணࠬ  
ணࠬ    짮⥫᪮	  ஢,        ࠭	
짮⥫᪮   ணࠬ   CPL   짮⥫.    ᮡ
ᯮᮡ	-    ன  ⥯   ࠪ⭮   ⨥
⥪  ०     32-    ⥬	
⮩     ணࠬ   ᥣ   -   ॣ,	..   
ᯮᠡ.
7e. W (㯭  ), ⮫쪮   ᥣ⮢  ,	-
㪠뢠 㯥  ᥣ      (W=1)    
(W=0).  ,  筮,  ᥣ  㯭    ⥭.
ਡ  W    ᯥ稢   ᢥ塥᭮   饭
ணࠬ ᯥ祭      ᥣ.    ਬ  ⮩
ᯥ樠쭮 ᮡ  ⭮  १ࢨ஢  ᥣ  
ଠ樨  ﭨ	    饤㯭    .	
⮩ 32-⭮ 饭 ⥬ ᥣ    㦨  
ࠧ 楫 , । 祣, ᮤন ⥪; ⮬    
 㯭  .

	     GDT (쭠  ਯ).
	      
   쭠 ⠡ ਯ  ᮤন  ᨢ  ਯ஢
ᥣ⮢.    .  8.4    १⭠	  
⠡       	࠭楩      	᭮
࠭⢠   । ⥬ ॣ஬ GDTR (.
. 20  . 2.8). GDTR ਭ 48- ࠭,	騩
 32-⭮   16-⭮ ࠭.	  ࠧ	  GDT
  ⢮           ।	
᭮ ࠭⢠;  ࠭  (ᨬ쭮  ᬥ饭)  
      FFFF,   墠뢠	   8192   ਯ஢,
஭㬥஢  0  8191. ਯ 0 -    GDT.
   ਯ 0, ᯥ樠쭮 ।   ⮩  ਯ,
 ᯮ ஬.  ࠭    㫥
ਯ 8 ⠬ 00   .
			16
 GDT  ᮤঠ ⮫쪮
   ਯ ᥣ⮢ ணࠬ .
   ਯ ᥣ⮢  .
   ⨫ 맮 . 14
   ਯ ᥣ⮢ ﭨ  . 14
   ⨫  . 14
   ਯ LDT . 14

			     - 91 -
      . 8.5. ᥫ ᮤন 3  	  ०
. 孨  13    ᮤঠ  ,    롨ࠥ	1
ਯ  GDT,     ⠡  (TI)  -  0,
㪠뢠騩  GDT.  TI  RPL  0-   ⥬
 ⮩,      . 8.5 .
    ०  㧪 ᥫ ॣ  ᥣ  뢠
 80386  ᥣ n,  ᠭ  ਯ஬  n,	  n	-
孨 13  ᥫ.孨 11  ᥫ  ᥡ  
  ⠡ ਯ஢ (GDT,   - 0).  樨,
 뫠 祭  ॣ ᥣ (CS, SS,  DS,  ES,
FS,  GS)  뢠  ,    80386  ⮬᪨  뫠	
ਯ n, ⠥ ਯ     ᮤঠ  
 ਯ.       ਯ  
 ॣ ᥣ,  ࠦ  . 8.6 .
		     4-⭮  ᭮ ࠭⢮
		    31	 24 23	 16 15	  8 7	  0
		    Ŀ
	FFFFFFFF    Ĵ
		16  Ĵ
		    Ĵ
				   .
   		   .
				   .
  + ࠭
		    Ĵ
	    .ਯ ??????? 	    ࠭
	    	    Ĵ
	    	    Ĵ
	    	     ਯ ??	   	   
	    	    Ĵ
	    	    Ĵ
	    			   .
	    			   .
	    			   .
	    	    Ĵ
	    	     ਯ 1 	   	   
	    	    Ĵ
	    	    Ĵ
    	     ਯ 0 "⮩         
       	    	    ਯ"            
  	    	    Ĵ
  .   
  	    	    Ĵ
  	    	    	   	   	   	    
  	    	    
  	    			   .
  	    			   .
  	    			   .
  	    	    Ĵ
  	    	    Ĵ 00000000
  	    	    	     16
  	    	     4-⭮  ᭮ ࠭⢮
  	    Ŀ
47			    16 15   	   0
Ŀ
 32-    16-⭠
	    GDT 	       ࠭ GDT

      c⥬ ॣ GDTR ( 80386)
	 . 8.4  GDTR ࠧ頥 GDT  
		     ᭮ ࠭⢥.

			     - 92 -
	   ଠ ᥫ   ०.
	    
	       ଠ ᥫ
 15 14 13 12 11 10  9  8  7  6	5  4  3  2  1  0
Ŀ
		  		TI  RPL  ॡ㥬 -
  ਢ-
    㪠뢠  ᮮ⢥	     	  ஢
	 ⠡ ਯ஢		     
	       				  00 =  
	       				    
	       				   㯠
	       				  01 = 
	       				   㯠 ࠭-
	       				   祭  ,
	       				   祬 ஢ 1
	       				  10 = 
	       				   㯠 ࠭-
	       				   祭  ,
	       				   祬 ஢ 2
	       				  11 = 
	       				   㯠 ࠭-
	       				   祭  ,
	       				   祬 ஢ 3
	       			 (祭 RPL: 01, 10,
	       			  11 - .  14)
	      
	        ⠡
		       0 - ਯ ஢  GDT
		       1 - ਯ ஢  LDT
				 (LDT . . 14)
  ଠ ᥫ  ⮩ ⥬  ⮩
 15 14 13 12 11 10  9  8  7  6	5  4  3  2  1  0
Ŀ
		  		TI  RPL 

  . 8.5    ०
    -ਯ ࠭  ਯ ᥣ.
  ᯮ짮   ᫥   	祭
࠭ ᥣ  ࠢ 㯠, ᯮ짮  ६ ஢ન
࠭  ࠢ 㯠. 饭 ॣ஢ -ਯ   稯
⢥  ॠ樨.  ᯥ稢    
 ᥬ ⥪騬 ᥣ⠬.
   ᪮쪮  ⠫  ᭨  . 8.6 .  ⨬,
  ਯ  CS  SS ᮤন  CPL,	    ६  
⠫  ᮤঠ  DPL.  	砥,  	 DPL   ணࠬ
ᥣ⮢ ⠭ CPL , ⠪,  DPL ⥪  ᥣ
 ᥣ ᮮ⢥⢮ CPL.  䠪  祭	  
  ⥬.

			     - 93 -
      ਯ ᥣ⮢ (  ਯ-
ᥣ⮢	     ஢ ᥣ⮢  稯)
Ŀ   Ŀ
	    32- 멳20-⭠ ࠭ 㣨 -
	     	 (      	
  CS	 	  ᥣ		 ࠭)G D P CPL C 
	    					   	R A	
Ĵ   Ĵ
	    32- 멳20-⭠ ࠭ 㣨 -
	     	 (      	
  SS	 	  ᥣ		 ࠭)G B P CPL E 
	    					   	W A	
Ĵ   Ĵ
	    32- 멳20-⭠ ࠭ 㣨 -
	     	 (      	
  DS	 	  ᥣ		 ࠭)G B P DPL E 
	    					   	W A	
Ĵ   Ĵ
	    32- 멳20-⭠ ࠭ 㣨 -
	     	 (      	
  ES	    	  ᥣ		 ࠭)G B P DPL E 
	    					   	W A	
Ĵ   Ĵ
	    32- 멳20-⭠ ࠭ 㣨 -
	     	 (      	
  FS	 	  ᥣ		 ࠭)G B P DPL E 
	    					   	W A	
Ĵ   Ĵ
	    32- 멳20-⭠ ࠭ 㣨 -
	     	 (      	
  GS	 	  ᥣ		 ࠭)G B P DPL E 
	    					   	W A	
   
. 8.6   ਯ   ॣ஢ ᥣ⮢.

	        
	       
     饭 ⥬ 짮⥫ 뢠	ணࠬ
㯥ࢨ, ᯮ ணࠬ 뢠 - 樨 INT n .
 ⮩ 楫 १ࢨ஢   32   255.
     뢠,  ⮬,-  ⤥    ⮩
32-⭮  ⥬    ⮩.     ࠧ`᭥   	᫥饬
ࠣ. ⥬ 㦤 ஥஢ ஢ ⥬.

	        
	     
    뢠    ०    -    襩  ⥯
筠  뢠  ० REAL, ᠭ   .6.
室⢮ ࠧ⥫쭮   ⭮襭
   1.    ० REAL, ணࠬ  뢠    맢
      ﬨ   INT   n.	      뢠
      ࠢ  室 ⠪ INTR (᪨㥬)    NMI
      (᪨㥬).	᫥  祭  뢠,  ࠢ
      । ணࠬ  㦨      १⭮
      ⠡, ᮤঠ饩 ᮮ⢥ ଠ  .
   2.  窨  室      㯥ࢨ   ணࠬ   뢠
      ᮤঠ । ⨫ 뢠   ⨫	⥬
      뢠.  	⨫  -    ஢  뢠
      ० REAL.  ⨫  뢠  ᮡ  室  
        뢠,     ६    ⨫
      ⥬ 뢠 -       ணࠬ
      뢠.

			     - 94 -
   3.  ⨫	뢠   	 ⨫   ⥬   뢠
      ᫥      १⭮   ᨢ,   뢠
      楩	ਯ஢  뢠  (IDT).  IDT  -   
      ⠡ ஢ 뢠, ᬮ७   ०  REAL.
      IDT  ᬮ७  .

		      ⨫ 뢠.
		       
    , ᯥ樠쭮 ஥஢  	
 뢠  ०  -   ⨫  뢠.
     ० REAL	-    뢠  -  ⨫
뢠 ᮤন  ᥫ    ᬥ饭.  ,  ᥫ	
ᬥ饭 祭   8-⭮  ਯய  	-
⨫ 뢠.
    ⨫ 뢠 ᮤন ஢ 8  - 2	32-
  ᫮,  ᮤঠ    ଠ    ࠢ
।   ࠢ	              뢠
ᥫ (   ᥫ஬ ணࠬ ᥣ)	
஢ ਢ஢, 祭 ⮬ ⨫. . 8.7
 ⨫ 뢠.
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

ᬥ饭 31...16  窨 室  ணࠬ ᥣ

    ᥫ ࠬ ᥣ-ਥ

	15 14 13 12 11 10 9  8	7  6  5  4  3  2  1  0
       Ŀ
       P   DPL  0  0  1  0  1 0  0  0       -         4
					    
       
       ᬥ饭 15...0  窨 室  ணࠬ ᥣ   0
       
      . 8.7 ⨫ 뢠   뢠
		        ०.
   ।  ⨫ 뢠
   1. 	  ணࠬ  ᥣ  -  ਥ  
      ணࠬ  ᥣ,  ᮤঠ騩	 ணࠬ   㦨
      뢠.  ᥫ 	뫠    ணࠬ
      ᥣ.
   2. 饭 窨 室   室  ணࠬ
      㦨 뢠.
   3. ࠢ 㯠 㪠뢠    ࠧ襭	  㯠	
      ⨫,	    ॡ	⢨       ஢
      ਢ஢.    ᫨   ᯮ짮   ⨫   
      ᮮ⢥   ॡ,        80386    ࠡ뢠
      ᪫⥫     饩    (᪫⥫
       13).
  3.  P  (⢨)  㪠뢠  㯥      ⨫   
      ᯮ짮 (P=1)   (P=0).   ᯥ譮	ࠡ⪨
         ⢮ ⨫.
  3. DPL (஢  ਢ஢   ਯ)	㪠뢠
      ஢ ਢ஢  ⨫. ⭮ 뢠
       ᥣ  ஠      ⨫
      뢠, ᫨  祭  騩,  ᨬ
       DPL  ⨫.	DPL  ਬ  ⮫쪮    ணࠬ
      뢠 (樨 INT n, INTO, BOUND   ᪫⥫
      樨).  DPL  㪠뢠  ஢   ਢ஢
      ⨫ ᫮ 0, 1, 2,  3  ᫥饬 ਭ樯

			     - 95 -
  DPL		   ਯ
 
    00	 ஢ 0 ᠬ ਢ஢ (㯥ࢨ, )
 
    01	 ஢ 1
 
    10	 ஢ 2
 
    11	 ஢ 3  訩 ஢ (짮⥫)
   	ணࠬ   뢠   	᪫⥫	 権
樨, ᯮ騥 뢠     PL  ࠩ
 ⠪  ஢ ਢ஢,      DPL  ⨫.
ਬ,   ᫨      ࠡ⠥   	⥪饬    ஢
ਢ஢    3,   	 ணࠬ   뢠    
ᯮ짮 ⮫쪮 ⨫ ஥뢠    DPL=3.    㣮
祭 DPL ⨫ (.. 2, 1,  0) 㤥 㪠뢠   
ਢ஢   ॡ	室      ᯥ譮  
⢨.    ⮣  㤥   ࠡ⠭   ᪫⥫쭠
 13 ( 饩 ).

       । ࠢ   ⨫ 뢠.
	
      ࠢ	।   	 ணࠬ   㦨
뢠 १ ⨫ 뢠,  ⥪ 뫠 3  
᫮  EFLAG,  CS  訬  0000     EIP.
						  16
    IF  EIP ⥬ 頥, ᪫ 쭥訥  뢠
 ⮣,  IF  ᭮  ⠭ ணࠬ  ࠧ     IF
筮 ⠭  砫  ணࠬ  㦨  
EIP ⥬ 㦠   ᬥ饭 ⨫	뢠    CS
㦠   ᥫ  ⨫	뢠.  80386  ⠪
⠥ ਯ, ᮮ⢥騩  ᥫ.      
⮩ ࠡ  㦠    ᢮  	ਯ  ணࠬ
ᥣ    ଠ  ਯ	-  ,࠭    ࠢ
㯠.  80386 த 뢠    ᬥ饭  EIP
-1  ணࠬ 㦨.

	       ⨫ ⥬ 뢠.
		
  ,  ᯥ樠쭮  ஥஢  	
ணࠬ 뢠    ०  -  ⨫	⥬
뢠 - 祭 宦  ⨫ 뢠, ᠭ  .
	 .  ⨫ ⥬ 뢠 ⮨  ஢ 8
 - 2- 32-  ᫮, ᮤঠ   ଠ
     뢠: ᥫ (  
 ᥫ஬ ணࠬ ᥣ), ᬥ饭   窨  室
ணࠬ ᥣ 	஢  ਢ,   祭  ⮬
⨫. .  8.8    ⨫  ⥬  뢠.
।   	⨫  ⥬  뢠	
ᮮ⢥騬 । ⨫ 뢠.

			     - 96 -
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

ᬥ饭 31...16  窨 室  ணࠬ ᥣ

    ᥫ ࠬ ᥣ-ਥ

	15 14 13 12 11 10 9  8	7  6  5  4  3  2  1  0
       Ŀ
       P   DPL  0  1  1  1  1 0  0  0       -         4
					    
       
       ᬥ饭 15...0  窨 室  ணࠬ ᥣ   0
       
      . 8.8 ⨫ ⥬ 뢠  
		뢠   ०.

		      । ࠢ
		       
	      ⨫ ⥬ 뢠.
	     
   ।  ࠢ  १	 ⨫   ⥬   뢠
筠    ।  १   ⨫	 뢠,   
᪫祭 ⮣,  䫠 IF  EFLAG  頥.  ࠭
ਨ稢 80386   ᪨㥬    뢠  
⠪ INTR,  ᮡ 㤮   ணࠬ  뢠  
.

	     IDT ( ਯ 뢠).
	      
   IDT -   ⠡ 뢠  , ᬮ७
 ० REAL (.  6). IDT ᮤন ⮫쪮 ⨫,    
ਯ.  ஬  ⨫  뢠,    ⨫	⥬
뢠, ᠭ  ⮩ ,        ⨯  ⨫,
뢠 ⨫ . ⨫ ,   㦭    
32- ⥬  ⮩, ᬮ७   14.
   IDT ᮤন ᨢ ⨫.    . 8.9, 	-
१⭠ ⠡  ᢮    	࠭楩,  ࠧ饭	
   ᭮   ࠭⢥,      ,   ।
।⢮ ⥬ ॣ IDTR (. .	     .  2.8).
IDTR ਭ 48- ࠭ 騩  32-  	
16-⭮ ࠭.  ࠧ, 	IDT    室  
   ।  ᭮ ࠭⢠; ࠭
(ᨬ쭮 ᬥ饭)  ⨣ 7FF16, 墠뢠    256
⨫, ஭㬥஢  0  255.	⨫  0  审  
  IDT.
IDT  ᮤঠ ⮫쪮
   ⨫ 뢠: .
   ⨫ ⥬ 뢠: .
   ⨫  . 14

	         
	       
祢,  	  ᮧ    ⥬    ணࠬ
ᯥ祭  設⢠   ⢥⢥   㭪権,   ⠪   
/뢮   ਬ, - ᫥ ॡ ࠧ 襣
஢	ਢ஢,   祬    ணࠬ  ᯥ祭
蠡  ᫥.	  祢,      ,
ᮤঠ騥,  	ਬ,  ID-	    짮⥫,   ᫥
 ᮪ ਢﬨ. (.. ᢥᥪ).	  饬,
  㯥ࢨ஬  ஫஢. 80386 ஥ 
ᯥ祭  室    ⥬  ᯮ짮	堭
ਢ.

			     - 97 -
    ०    4- ஢ ਢ.	4  ஢
ᯥ稢 室 ࠭㫫஢   ᠬ ᫮
⥬. , ஢ 쭮 ⥬  
ᯮ짮	2-   ஢	   ॠ쭮    ஢
஥஢	⥬  짮⥫/㯥ࢨ.   ।
⥬       ᯮ짮    ࠩ  	3
஢,      訩   ஢	ਪ   ணࠬ
ᯥ祭 짮⥫      㯥ࢨ  ।  2-  
襣 ᫠  ਢ஢ ஢.
      뢠  砥  ᯮ짮    
஢ ਢ.      ਬ,    	
 ஢ ਢ஢    祭.    
ॡ  ⮫쪮    ᪮  ᫥   80386.   
ᯮ  ⮫쪮  1  ஢  ਢ஢,	   
砥,       ஢  0  -	ᠬ	ਢ஢
஢, ⠪ ⮡  믮   80386.

		   
		  
       ࠧ    뢠	  ।     	 ஢ﬨ
ਢ஢.     ,	 	 80386	 ।
ࠢ         ணࠬ	 ᥣ    	  ஢
ਢ஢ n    㣮  ணࠬ  ᥣ    ஢
ਢ஢ m.  ।        
ࠢ , ⥬,  -    㣮  -	⤥묨  ﬨ,
⠪  CALL (  ᮪ ஢ ਢ஢),	
RET (,    ஢ ਢ஢),   INT
n (  ᮪ ஢ ਢ஢)  IRET  (,
  ).  ⥪  80386      ०,  
ᠭ  ⮩ ,  믮  ।.
    ࠢ ।    ᥣ    㣮,	
ॣ ணࠬ ᥣ  稪   80386  㦠
 祭.  ᮮ⢥⢨  ⨬, 樨 믮  
㣮	 .   ।   ࠢ   	 	  ஢
ਢ஢  ⨥ । ࠢ   
蠣.
   ஢ ।  ⮪  権      ⥪.
	㧪    祭  CS    EIP,	    筮
।, ⠪ 㦠 묨 祭ﬨ  ॣ	⥪
ᥣ  㪠⥫ ⥪. 㧪 CS:EIP  SS:EIP  ᮣᮢ
  ஢ ਢ஢,  騬	᢮  ᮡ⢥
⥪  ᯥ祭 楫⭮ ⥪   짮
஢ 㯥ࢨ.

	樨 INT n, ᯮ㥬  ஢
	 
	    ।    ⥬.
	     
      . 8.10, ।   ਢ஢
஢  ⢫   ணࠬ	㯥ࢨ  ﬨ
INT n.   ணࠬ 樥 IRET ⨣ ।	
 ஭.

			     - 98 -
	      4-⭮  ᭮ ࠭⢮
		    31	 24 23	 16 15	  8 7	  0
		    Ŀ
	PPPPPPPP    	   	   	   	   
		16  Ĵ
		    	   	   	   	   
		    Ĵ
				   .
   		   .
  + ࠭ 		   .
		    Ĵ
	    .⨫ N, N <= 255	    ࠭
	    	    Ĵ
	    	    Ĵ
	    	     ⨫ N - 1	   	   
	    	    Ĵ
	    	    Ĵ
	    			   .
	    			   .
	    			   .
	    	    Ĵ
	    	     ⨫ 1    	   	   
	    	    Ĵ
	    	    	   	   	   	   
	    	    Ĵ
    	     ⨫ 0    	   	   
       	    Ĵ
  	    	    Ĵ
  .   
  	    	    Ĵ
  	    	    	   	   	   	    
  	    	    Ĵ
  	    			   .
  	    			   .
  	    			   .
  	    	    Ĵ
  	    	    	   	   	   	    00000000
  	    	    	     16
  	    	     4-⭮  ᭮ ࠭⢮
  	    Ŀ
47			    16 15   	   0
Ŀ
32-   16-⭠    
	    IDT 	      ࠭ IDT  

      c⥬ ॣ IDTR ( 80386)
	 . 8.4  IDTR ࠧ頥 IDT  
		     ᭮ ࠭⢥.
       ஢		    
 । ""   ਢ஢   । ""
 
		  00 ஢ 㯥ࢨ 
   INT n	  01			     IRET
		  10			  
		  11 ஢ 짮⥫
	     . 8.10. ஢ । १
	 ணࠬ 뢠    뢠.

			     - 99 -
	       ਢ஢ ஢.
	     
       ⢥  ⨫	n    IDT   뢠   ⨫
뢠  ⨫ ⥬  뢠,    INT	n
ࠢ  ᥫ  ᬥ饭 १ ⨫    ।
ਥ. ⨫ ⥬ 뢠,    ⨫  뢠
ᯥ稢  ।	ࠢ    ᯥ樠    室,
    	  ᮪,      ⮬    ஢
ਢ஢  CPL 樨 INT n.
   	  ,  ।      室   ࠧ蠥	
ᨬ  ࠢ CPL 樨 INT n c  DPL  -  ⨫.
ਬ ଠ쭮 ࠢ ࠢ.  ᫨  CPL    ࠩ
 ⮣  ஢,   DPL ⨫,  । ࠢ	
   ⨫   室   ᯥ譮.      ⨢    砥
   ᪫⥫쭠	    	  饩    
(᪫⥫쭠    13)(.     16	    쭥襩
ଠ樨  ᪫⥫   ० ).
   ⨫ 祢  蠣 ᢥ  	 
⨦     ணࠬ                ᮪	   ஢
ਢ஢.  , ।⢮ ⮣ ⨫  頥
 ਢ஢  ணࠬ ࠧ襭 㯠	⮫쪮	
⮬ 砥, ᫨ ।⠢ ⨫    ।⢮  ।
筮 窨 室  ਢ஢ ணࠬ.

		 ஧筮  짮⥫.
		  
   ७  ஢  ਢ஢  ⢫  묨
ﬨ INT n  IRET.  ஧    짮⥫,  ⠪
  ᯥ樠 権  ॡ.
   ਬ砭: 樨  CALL,    뫠    ⨫
맮,  ⠪	ᮢ  ७   ஢   ਢ஢
஧ ࠧ. ⨫ 맮 㦤 	.  14.    ⮩
⥬  ⮩   ᯮ㥬  뢠.
   ணࠬ  㯥ࢨ   ,      樨   INT	n
⢫  ஢  ७   ।⢮	 ஫஢
ᮤঠ ⨫ n,   뫠 .	ਬ,
᫨  ਥ	-  ⨫  k,	 ᥫ   ண   ।
ணࠬ ᥣ ⠪    ਢ஢,    CPL,  
 INT k ⮫쪮 । ࠢ  㦥	ணࠬ
(CS:EIP 㦠 묨 祭ﬨ). ,   
INT  q	।  ⨫  q,  ᥫ   ண   ।
ணࠬ ᥣ  ᮪ ஢ ਢ஢,  
    ⮬᪨  ७  ஢  (CS:EIP	  SS:ESP
㦠 묨 祭ﬨ).
   ⢥⢥,   IRET  ஢	ᮤঠ  CS	
⥪ 㯥ࢨ  । DPL  ਥ  .  ᫨
DPL ᮢ  CPL,    ।    ७  ஢
(CS:EIP 㦠 묨 祭ﬨ.) ᫨ DPL ,	祬  CPL,
 ந室  ᭨  ஢.  (CS:EIP    SS:ESP  㦠
묨 祭ﬨ).

	       32-   
		
    ﭨ  - TSS ࢮ砫쭮  ᯮ짮	
⨧ ⥬,   ᬮ७      5.    ⠪
⥬,  	80386  ᯥ稢     প   
讣 ⢠ ,  32-  ᥣ	ﭨ  
ᮧ   32-⭮   ࠭  ᮤন
ॣ஢ ,  	  ⨢.    ⨬	稭,
32-  ᥣ  ﭨ    	   筮

			    - 100 -
訬, ⮡   室 ଠ, ⭮ 
 .  32-⭮  32- TSS  , 
ࠩ , 104   .
	ணࠬ 砭:   ⮩  32-⭮  ⥬	
⮩  TSS  㦨  ⮫쪮  ⮬  ࠭	㪠⥫   ⥪
㯥ࢨ - SS:ESP.  -  ࠧ    ᥣ,    
`   ਯ஬  GDT,	宦  ࠧ,  	2
ᥣ   2 ணࠬ ᥣ, 室   ⮩
⥬.
    ⮩ 32-⭮ ⥬  ⮩  32-⭮ TSS  
 㫨, ᪮ ⭮   ,    㦭    ⮩
⥬  ⮩.   , TSS    ,    ࠩ
, 104   ,        .  8.11.    
⭮    SS  ESP  ஢ 0.   2    
㪠뢠   	 砫   SS:ESP,   ᯮ㥬      ⥪
㯥ࢨ.

			ਯ TSS.
			 
   32- ᥣ ﭨ   .  8.11  `,
 騩  ᯥ樠쭮 ਯ GDT.   ਯ  TSS
ࠦ  . 8.12. । ,    ਯ
TSS  ।  ਯ ணࠬ ᥣ, 
᪫祭:
   B (),  㪠뢠 -   ⥪  (B=1)
  (B=0).  ⮩ ⥬  ⮩    
⠭  1. 쭥訥 ⠫ ⭮⥫쭮  B  
  14.
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

    TSS	31...24 G 0 0 AVL࠭ ᥣ 19...16

           TSS 15...0          

		 15 14 13 12 11 10 9  8  7  6  5  4  3	2  1  0
		Ŀ
		P  DPL 0 1 0 W 1     TSS	23...16 
		Ĵ
		             ࠭ TSS 15...0      	
		
	  ਯ ᥣ TSS  32-⭮ TSS.
	      . 8.12 ਯ  32-⭮
		   ᥣ ﭨ .

	      樠 TR ( ).
	       
,  ᪠  32-⭮  TSS  㦭  㧨  ᥫ
ਯ TSS  ॣ  	०,  ஥஢
ᯥ樠쭮  ⮩ 楫 -   (TR).
   TR 樠 㧪 祭 ᥫ   ॣ	
  LTR. ᯮ㥬 ᥫ   뫠  
ਯ   TSS,  ⠪      .  8.12,	  ᮤন
室    ଠ   ࠭.    
ਯ, 易  ॣ஬ TR ࠭ ७  
ਯ୮  TSS,      .  8.13.	ᯮ
樨  LTR    㧪	 ਯ   LDT,   TSS   
ᯮ     ᭮ ࠭⢠,   
   64 ,  ࠦ  . 8.14.

			    - 101 -
31			      16 15				0
Ŀ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  100
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  96
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  92
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  88
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  84
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  80
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  76
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  72
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  68
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  64
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  60
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  56
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  52
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  48
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  44
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  40
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  36
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  32
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  28
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  24
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  20
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  16
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  12
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0    SS  ஢ 0      8
Ĵ
            ESP  ஢ 0              4
Ĵ
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  0

	 . 8.11 32-  ﭨ  (TSS),
	  ᯮ騩 ⮫쪮 SS:ESP  ⥪ 㯥.

			    - 102 -
       ਯ ᥣ (  ਯ-
TR		      TSS  稯)
Ŀ   Ŀ
	    32- 멳20-⭠ ࠭ 㣨 -
  TR	  	 (      	
	    	  TSS			 ࠭)	P DPL B 
   
	. 8.13   ਯ  ॣ TR.
   ⨬.    ਯ  TSS  室      GDT.   ⮬
室 ᮧ ࠧ GDT  ᭠砫	樠஢  GDTR.	
⠭ GDT  믮  LTR    㧪
TR  ।⢮ ⮣ 㦠 TSS.

	16-ࠧ來 SS ᮤন ᫥ ଠ:
   䨪஢ ,뢠 ᮤন ॣ஢,-
⥫ 易⥫       䨪஢	,
 ,祭 ࠭⥫ SS.
	     32-ࠧ來 SS ᮤন ᫥ ଠ:
䨪஢ ,뢠 ᮤন ॣ஢,易⥫-
  ⮢    ࠧ饭  /뢮,     
祭 SS
		    4-⭮  ᭮ ࠭⢮
		    31	    24 23     16 15	 8 7	    0
		    
		    					    FFFFFFFFh
		    Ĵ
		    					    
		    Ĵ
 : 			.
+࠭⥫   Ĵ
     TSS					    
		   Ĵ
		   					    
		   Ĵ
		     ﭨ  SS .4.11 
		   Ĵ
					.
 :    Ĵ
 TSS.    
	   	   Ĵ
	   	   					    
	   	   Ĵ
	   				.
	   				.
	   	   Ĵ
	   	   					    00000000h
	   	   
	   	    4-⭮  ᭮ ࠭⢮
	   	
	   	Ŀ
	   Ŀ		 
			 		 
			 		 
15	  0   31	 	   0 19  	 0
Ŀ   Ŀ
   TR	     32-ࠧ來 멳20-ࠧ來멳⠫ 
	        SS   ࠭⥫쳠ਡ 
   
 ॣ TR    ਯ ᥣ TR (,࠭ 
	      ⠫  ਯ LD)
.8.14  ਯ R  ।  ⮯  ⮣
	 SS   ᭮ ࠭⢥.

