如何使用带dosbox的汇编8086设置系统时间？

Question

我希望设置系统时间，并获取显示时间。我已经用下面的代码成功地获得了系统时间

mov ah,2ch              ;get time
int 21h                 ;ch = hr, cl = min, dh = sec

但是我不能通过以下两种方法设置系统时间

mov ah,03h

mov ch,hr(in bcd)
mov cl,mm(in bcd)
mov dh,sec(in bcd)
mov dl,am_pm

int 1ah 

和

mov ah,2dh
mov ch,hr
mov cl,mm
mov dh,sec
int 21h

Answer 1

.MODEL SMALL
.DATA
.CODE
START: MOV AX,@DATA
MOV DS,AX

;Hour Part
HOUR:
MOV AH,2CH    ; To get System Time
INT 21H
MOV AL,CH     ; Hour is in CH
AAM
MOV BX,AX
CALL DISP

MOV DL,':'
MOV AH,02H    ; To Print : in DOS
INT 21H

;Minutes Part
MINUTES:
MOV AH,2CH    ; To get System Time
INT 21H
MOV AL,CL     ; Minutes is in CL
AAM
MOV BX,AX
CALL DISP

MOV DL,':'    ; To Print : in DOS
MOV AH,02H
INT 21H

;Seconds Part
Seconds:
MOV AH,2CH    ; To get System Time
INT 21H
MOV AL,DH     ; Seconds is in DH
AAM
MOV BX,AX
CALL DISP


;To terminate the Program

MOV AH,4CH     ; To Terminate the Program
INT 21H

;Display Part
DISP PROC
MOV DL,BH      ; Since the values are in BX, BH Part
ADD DL,30H     ; ASCII Adjustment
MOV AH,02H     ; To Print in DOS
INT 21H
MOV DL,BL      ; BL Part 
ADD DL,30H     ; ASCII Adjustment
MOV AH,02H     ; To Print in DOS
INT 21H
RET
DISP ENDP      ; End Disp Procedure


END START      ; End of MAIN

试试这个wotking吧