;二进制多字节乘法，看不太懂，能给个具体流程图吗？
DATA SEGMENT
DATA1 DB 4 DUP(?)
DATA2 DB 3 DUP(?)
DATA3 DB 7 DUP(?)
CY1 DB 0
CY2 DB 0
DATA ENDS
CODE SEGMENT
ASSUME CS:CODE,DS:DATA
START: MOV AX,DATA
MOV DS,AX
MOV CL,DATA2-DATA1
MOV BX,OFFSET DATA3
MOV BP,BX
MOV SI,OFFSET DATA1
REP1: MOV DI,OFFSET DATA2
MOV CH,DATA3-DATA2
REP2: MOV AL,[SI]
MUL BYTE PTR [DI]
AAM
ADD AL,[BX]
AAA
MOV [BX],AL
MOV AL,AH
ADD AL,CY1
AAA
JNC NEXT1
INC CY2
NEXT1: ADD AL,[BX+1]
AAA
JNC NEXT2
INC CY2
NEXT2: MOV [BX+1],AL
MOV AL,CY2
MOV CY1,AL
MOV CY2,0
INC BX
INC DI
DEC CH
JNZ REP2
INC BP
MOV BX,BP
INC SI
MOV CY1,0
DEC CL
JNZ REP1
MOV AH,4CH
INT 21H
CODE ENDS
END START