例6：设缓冲区DATA中有一组单字节有符号数，以0为结束标志。写一个程序实现如下功能：把前5个正数依次送入缓冲区PDATA，把前5个负数依次送入缓冲区MDATA；如正数或负数不足5个，则用0补足。
自解：
1 DSEG SEGMENT 2 DATA DB -1,1,-2,2,3,-3,-4,4,5,-5,-6,6,0 3 PDATA DB 0,0,0,0,0 4 MDATA DB 0,0,0,0,0 5 DSEG ENDS 6 ;------------------------------------ 7 CSEG SEGMENT 8 ASSUME DS:DSEG,CS:CSEG 9 START: 10 MOV AX,DSEG 11 MOV DS,AX 12 13 MOV BX,OFFSET DATA 14 XOR SI,SI 15 XOR DI,DI 16 MOV AL,0 17 DEC BX 18 UP: INC BX 19 AGAIN:CMP AL,[BX] 20 JZ OK 21 JG NEXT 22 CMP DI,5 23 JAE UP 24 INC DI 25 MOV DH,[BX] 26 MOV MDATA[DI],DH 27 INC BX 28 JMP AGAIN 29 NEXT: 30 CMP SI,5 31 JAE UP 32 INC SI 33 MOV DL,[BX] 34 MOV PDATA[SI],DL 35 INC BX 36 JMP AGAIN 37 38 OK: MOV AH,4CH 39 INT 21H 40 CSEG ENDS 41 END START
例解：
1 MAX_COUNT = 5 2 DSEG SEGMENT 3 DATA DB 3,-4,5,6,-7,8,-9,-10,-1,-32,-123,27,58,44,-12,0 4 PDATA DB MAX_COUNT DUP(?) 5 MPATA DB MAX_COUNT DUP(?) 6 DSEG ENDS 7 ;------------------------------------------------------ 8 CSEG SEGMENT 9 ASSUME DS:DSEG,CS:CSEG 10 START: 11 MOV AX,DSEG 12 MOV DS,AX 13 14 MOV CX,MAX_COUNT 15 MOV SI,OFFSET PDATA 16 MOV DI,OFFSET MPATA 17 MOV AL,0 18 NEXT1: MOV [SI],AL 19 MOV [DI],AL 20 INC SI 21 INC DI 22 LOOP NEXT1 23 24 MOV BX,OFFSET DATA 25 XOR DI,DI 26 XOR SI,SI 27 NEXT2: MOV AL,[BX] 28 INC BX 29 CMP AL,0 30 JZ OK 31 JG PLUS 32 CMP DI,MAX_COUNT 33 JAE CONT 34 MOV MPATA[DI],AL 35 INC DI 36 JMP SHORT CONT 37 PLUS: CMP SI,MAX_COUNT 38 JAE CONT 39 MOV PDATA[SI],AL 40 INC SI 41 JMP SHORT CONT 42 CONT: MOV AX,SI 43 ADD AX,DI 44 CMP AX,MAX_COUNT+MAX_COUNT 45 JB NEXT2 46 OK: MOV AH,4CH 47 INT 21H 48 CSEG ENDS 49 END START
