MOV MOV LDS ADD
AX, [SI] [SI+22H], 1200H SI, [SI+20H] AX, [SI]
ִкDS= SI= AX=
3.8֪AX=0A5C6H,(CX)=0F03H,CF=1 RCL AX, CL AND AH, CH
RCR
AX, CL
ִָкأ
3.9֪AX=0FC77H,(CX)=504H,CF=1 SAR
AX, CL
XCHG CH, CL SHL
AX, CL
ִָкأ
3.10֪AX=1234H MOV BX, AX NEG BX
ADD
AX, BX
ִָкأ ãƣ (BX)
ãƣ
3.11֪AX=4321H
INC NEG DEC NEG
AX AX AX AX
ִָкأ 3.12֪AX=0A33AHDX=0F0F0H
AND XOR NEG NOT
AHDL ALDH AH AL
ִָкأ
3.13֪AX=0FF60H CF=1
MOV XOR SBB
DX96 DH0FFH AXDX
ִָкأ ãƣ 3.14ҪֱƳΣ ١ѱ־ĴзλSF?1? ڡĴALиߵ4 λ
ۡɼĴAX BXһ32λAX д16λĸ
ܡֽڴ洢ԪABCڲʹADDADCָ£ʵ֣A + BC
ݡһָCXеתԭCXݲ䣻ԭżCX +1γ
ޡAX0λBXжӦλ䷴λֲ 3.15ԸиָĻĿ룺 ١MOV ڡMOV ۡSAL ܡADD
BL,12H[SI] 12H[SI],BL DX,1
0ABH[BP][DI],1234H
4.1֪г DATA SEGMENT
DB1 DB 12H,34H,0,56H DW1 DW 78H,90H,0AB46H,1234H ADR1 DW DB1 ADR2 DW DW1
BUF DB 5 DUP(0) DATA ENDS COSEG SEGMENT
ASSUME CS:COSEG,DS:DATA STACK1 SEGMENT PARA STACK DW 20H DUP(0)
STACK1 ENDS
ORG 30H START:
XOR CX,CX MOV CL,3 ADD ADR1,CX SUB ADR2,CX MOV BX,ADR2 MOV DI,ADR2 MOV AL,DB1[BX] MOV BUF[DI],AL MOV AX,DW1[BX][SI] MOV WORD PTR BUF,AX
COSEG ENDS
END START
нBUFиֽڵԪʲô AXAC27BX0704CX0003DX0000 SI0000DI0704BP0000SP0040 DS139BES139BSS13B3CS13AB IP0053
DS0030CC 11 14 00 18 9B 13