KEYBOARD CONTROL

Aim

To write an assembly language program to read a key code and scan from keyboard.

Program

Code segment

Assume cs: code , ds:code

Org 1000h

Mov si,1200h

Mov ah,00h ;                         bios call for key status read

Int 16h

Mov [si] , ah ;                       store the key code

Inc si

Mov [si], ah ;                        store the scan code

Mov ah, 4ch ;                        dos call for program termination

Int 21h

Code ends

End

Result:

Thus keyboard, display control and file manipulation program are executed by using BIOS/DOS call.