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04H 04H FFH £¨2£©
4.8´ð£º£¨1£©myl_b db ¡®Personal Computer£¡¡¯- 04H 04H 04H 34H 12H FBH FFH - - - - - - - - - - - -
£¨2£©my2_b db 64H
£¨3£©my3_w dw 100 dup(?) £¨4£©my4_c equ 100
£¨5£©my5_c equ
4.9´ð£º£¨1£© mov byte ptr [bx],256£»¸ÄÕý¨D¨Dmov word ptr [bx],256
£¨2£© mov bx,offset opw[si]£»¸ÄÕý¨D¨Dmov bx,offset opw £¨3£© add opbl,opb2£»¸ÄÕý¨D¨Dadd al,opb2 £¨4£© mov opbl,al+l£»¸ÄÕý¨D¨Dmov opbl,al £¨5£© sub al,opw£»¸ÄÕý¨D¨Dsub al,opb1
£¨6£© mov [di],1234h£»¸ÄÕý¨D¨Dmov word ptr [di],1234h 4.10´ð£º .MODEL SMALL .DATA X DW 1234H Y DW 4321H MAX DW ? .CODE
START: MOV AX,@DATA MOV DS,AX MOV AX,X CMP AX,Y JNZ NEQU
MOV MAX,0FFFFH JMP STOP NEQU: JC NEXT MOV MAX,X JMP STOP
NEXT: MOV MAX,Y STOP: MOV AX,4C00H INT 21H END START
4.11´ð£º.MODEL SMALL .DATA
DAT DW 9234H SIGN DW ? .CODE
START: MOV AX,@DATA MOV DS,AX
MOV AX,DAT
CMP AX,0 JZ STOP
TEST AX,8000H JNZ FU MOV SIGN,0 JMP STOP
FU: MOV SIGN,0FFH STOP: MOV AX,4COOH INT 21H END START 4.12´ð£º DISPLAY MACRO
MOV AH,2 INT 21H ENDM
.MODEL SMALL .DATA X DW 1230H Y DW 1234H Z DW 1234H
.CODE
START: MOV AX,@DATA
MOV DS,AX MOV AX,X MOV BX,Y CMP AX,Z JNZ N1 CMP AX,BX JNZ N2 MOV DL,'Y' DISPLAY
STOP: MOV AX,4C00H
INT 21H
N1: CMP AX,BX
JNZ N3 N2: MOV DL,'X'
DISPLAY JMP STOP N3: CMP BX,Z
JNZ N4 JMP N2 N4: MOV DL,'N'
DISPLAY JMP STOP END START 4.13´ð£º .MODEL SMALL .DATA
DAT DB 12H,23H,0F3H,6AH,20H,0FEH,10H,C8H,25H,34H SUM DW ?
.CODE
START: MOV AX,@DATA
MOV DS,AX MOV CX,10 MOV DX,0 LEA BX,DAT AGAIN: MOV AL,[BX] CBW
MOV DX,AX INC BX LOOP AGAIN MOV SUM,DX MOV AX,4C00H INT 21H END START 4.14´ð£º
.MODEL SMALL .CODE
START: MOV AX,2000H
MOV DS,AX MOV SI,0 MOV DX,0 MOV CX,0FFFFH AGAIN: MOV AL,[SI] CMP AL,20H JNZ NEXT INC DX
NEXT: INC SI LOOP AGAIN MOV AX,4C00H INT 21H END START
4.15. ´ð£ºprocname PROC [attributes field][USES register list][,parameter field] ©«
Procname ENDP
pushºÍpopµÄʹÓÃÊÇΪÁ˱£»¤×Ó³ÌÐòµÄµ÷ÓõÄÏÖ³¡£¬±ÈÈç¼Ä´æÆ÷µÄÖµ¡£±¾ÀýÖÐÒª±£»¤µÄ¼Ä´æÆ÷ÊÇaxºÍdx¡£
jiafa PROC;ÓÃCX£¬BX´«²ÎÊý¨D¨DÊý¾ÝµÄ¸öÊýºÍÊý¾ÝµÄÆðʼµØÖ·£¬½á¹û·ÅÔÚ×ÖÄÚ´æµ¥ÔªSUMºÍSUM£«1
push ax push dx xor ax,ax xor dx,dx
again: add ax, [bx]
adc dx,0 inc bx
inc bx loop again mov sum,ax mov [sum+1],dx pop dx pop ax ret
jiafa ENDP
4.16´ð£º
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