Session 9 4 alp to display the current system time using dos int 21 h
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This program displays the current system time by using DOS interrupt 21H function 2CH to retrieve the time from the system. It breaks the time value into hours, minutes, seconds and stores each part separately before converting them to ASCII characters and displaying them along with a colon separator between each part to show the time as HH:MM:SS. The program ends by returning control back to DOS.
Session 9 4 alp to display the current system time using dos int 21 h
- 1. Write a program to display the current system time using DOS INT 21H, function 2CH. macro putc c mov dl, c mov ah, 2 int 21h endm .model small .data msg db 10,13,'The current time is:$' .stack 100 .code mov ax, @data mov ds, ax mov ah, 2ch int 21h push dx mov al,ch aam add ax, 3030h mov bx, ax putc bh putc bl putc ':' mov al,cl aam add ax, 3030h mov bx, ax putc bh putc bl putc ':' pop cx mov al,ch aam add ax, 3030h mov bx, ax putc bh putc bl putc ':' mov al,cl aam add ax, 3030h mov bx, ax putc bh putc bl mov ah, 4ch int 21h end