dos下常驻内存时钟程序
no stack segment ,后来我想改为com文件，但仍是LINK时有no stack segment 问题，你帮我看看要改哪里好吗？
原文件：

DATA SEGMENT
BUFF DB 12 DUP(?)
CRLF DB 0DH,0AH,24H
TSTR DB "00:00:00"

PROG_LEN EQU 1000
DATA ENDS

CODE SEGMENT
ASSUME CS:CODE,DS:DATA
MAIN PROC FAR

MOV AX,DATA
MOV DS,AX
LEA DX,TIME
MOV AX,SEG TIME
MOV DS,AX
MOV AL,1ch
MOV AH,25H
INT 21H


MOV AH,31H
MOV AL,0
MOV DX,((PROG_LEN+15)/16)+16
INT 21H

MAIN ENDP
PRINT PROC NEAR
MOV AX,DATA
MOV DS,AX
MOV AX, 0B800H
MOV ES,AX
LEA SI,TSTR
MOV DI,0

MOV CX,8
CLD
REP MOVSB


ret
PRINT endp

TIME PROC far
push ax
push bx
push cx
push dx
push si
push di
push bp
push ds
push es


MOV AH,0
MOV DI,0
M1: MOV AL,AH
OUT 70H,AL
IN AL,71H
MOV BUFF[DI],AL
INC DI
ADD AH,2
CMP AH,6
JNE M1


MOV DI,0
MOV BX,10
XOR CX,CX
XOR AX,AX
MOV BP,7

MOV AL,BUFF[DI]
M2: XOR DX,DX

DIV BX
PUSH DX
CMP AX,0
JNE M2

MOV SI,BP
M3: POP DX
ADD DX,30H
MOV TSTR[SI],DL
DEC SI
LOOP M3
INC DI
SUB BP,3
CMP DI,3
pop es
pop ds
pop bp
pop di
pop si
pop dx
pop cx
pop bx
pop ax


iret
TIME endp

CODE ENDS
END MAIN


[解决办法]
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Assembly code

ASSUME CS:CSEG,DS:CSEGHEAD=1AHTAIL=1CHBUFHEAD=1EHBUFTAIL=3EHKEY=6500HCR=0DHLF=0AHCSEG SEGMENTOLD09H  DW 2 DUP(0)DATE    DB 6 DUP(0)ADR     DB 9,8,7,4,2,0BUF     DB 2 DUP(0),' ',0CRLF    DB CR,LF,0NEW09H: PUSHF        CALL DWORD PTR CS:OLD09H        STI        PUSH DS        PUSH ES        PUSH AX        PUSH BX        PUSH CX        PUSH DX        PUSH SI        PUSH DI        MOV AX,40H        MOV DS,AX        MOV BX,DS:[HEAD]        CMP BX,DS:[TAIL]        JZ L1        MOV AX,DS:[BX]        CMP AX,KEY        JZ L2     L1:POP DI        POP SI        POP DX        POP CX        POP BX        POP AX        POP ES        POP DS        IRET     L2:ADD BX,2        CMP BX,BUFTAIL        JNZ L3        MOV BX,BUFHEAD     L3:MOV DS:[HEAD],BX        MOV AX,CS        MOV DS,AX        MOV ES,AX        MOV CX,6        LEA SI,ADR        LEA DI,DATE        CLD     L4:LODSB        OUT 70H,AL        JMP $+2        IN AL,71H        STOSB        LOOP L4        MOV CX,4        MOV DI,6        LEA SI,DATE        CLD     L5:LODSB        MOV AH,AL        AND AL,0FH        ADD AL,30H        SHR AH,CL        ADD AH,30H        XCHG AH,AL        MOV WORD PTR BUF,AX        LEA BX,BUF        MOV AH,0EH     L6:MOV AL,[BX]        INT 10H        INC BX        OR BYTE PTR [BX],0        JNZ L6        DEC DI        JNZ L5        LEA BX,CRLF        MOV AH,0EH     L7:MOV AL,[BX]        INT 10H        INC BX        OR BYTE PTR [BX],0        JNZ L7        JMP L1START : NOP        MOV AX,CS        MOV DS,AX        MOV AX,3509H        INT 21H        MOV OLD09H,BX        MOV OLD09H+2,ES        LEA DX,NEW09H        MOV AX,2509H        INT 21H        MOV DX,OFFSET START+15        MOV CX,4        SHR DX,CL        ADD DX,10H        MOV AX,3100H        INT 21HCSEG ENDSEND START