: , /, . 3.1.
3.1.
.
| / | ||
| : | ||
| MOV , | () | |
| XCHG , | ||
| POP | ||
| PUSH | ||
| XLAT/XLATB | ||
| /: | ||
| IN , | ||
| OUT , | ||
| : | ||
| LDS , | ||
| LEA , | ||
| LES , | ||
| : | ||
| LAHF | AH | |
| SAHF | AH | |
| POPF | ||
| PUSHF |
.
MOV (move data) , :
MOV dst, src
dst , src .
:
| dst | src |
| r8 | i8, r8, m8 |
| m8 | i8, r8 |
| r16 | i16, r16, sr, m16 |
| sr ( CS) | i16, m16 |
| m16 | i16, r16, sr |
XCHG (exchange) ( , ), :
XCHG dst, src
XCHG:
| dst | src | |
| r8 | r8, m8 | |
| m8 | r8 | |
| r16 | r16, m16 | |
| m16 | r16 |
Examle 3.4. XCHG.
;
count db 10h, 20h
total dw 1234h
var16 dw?
;
XCHG AX, total;
XCHG AX, BX;
XCHG DL, AL;
XCHG count, AL;
XCHG var16, AX;
PUSH (PUSHed) - , a POP (POPed) - .
PUSH src.
POP dst
PUSH POP :
dst - r16, m16, sr ( CS) src - r16, m16, sr
Examle 3.5. PUSH POP.
;
var16 dw 1234h
;
PUSH BX;
PUSH var16;
POP BX;
POP var16;
;
MOV BP, SP;
MOV AX, [BP];
XLAT . AL 256- , BX, - AL. DS. XLATB, , .
|
|
|
XLAT [table]
XLATB [table]
[table] , .
3.1. XLAT.
Examle 3.6. XLAT.
; 0 15 16-
;
tablehex db 0123456789ABCDEF;
;
MOV BX, OFFSET tablehex; BX tablehex
MOV AL, 10; AL
XLAT; 16-
LEA 16- . MOV, .
LDS 32- , - DS.
LES 32- , - ES.
LEA reg, mem
LDS reg, mem
LES reg, mem
Examle 3.7. LES, LDS LEA.
;
str_1 DB Hello; str_1 Hello
str_2 DB 50 DUP ( );
str_pnt DD str_1; str_pnt str_1
;
LEA SI, str_1;
LEA DI, str_2;
MOV AL, [SI];
MOV [DI], AL;
LES BX, str_pnt;
LDS BX, str_pnt;
