; this sample shows the use of keyboard functions. 
; try typing something into emulator screen.  
; 
; keyboard buffer is used, when someone types too fast. 
; 
; for realistic emulation, run this example at maximum speed 
; 
; this code will loop until you press esc key, 
; all other keys will be printed. 

name "keybrd"

org     100h

; print a welcome message: 
mov dx, offset msg
mov ah, 9
int 21h

;============================ 
; eternal loop to get 
; and print keys: 

wait_for_key:

; check for keystroke in 
; keyboard buffer: 
        mov     ah, 1
        int     16h
        jz      wait_for_key

; get keystroke from keyboard: 
; (remove from the buffer) 
mov     ah, 0
int     16h

; print the key: 
mov     ah, 0eh
int     10h

; press 'esc' to exit: 
cmp     al, 1bh
jz      exit

jmp     wait_for_key
;============================ 

exit:
ret

msg  db 'type anything...', 0Dh,0Ah
     db '[enter] - carriage return.', 0Dh,0Ah
     db '[ctrl]+[enter] - line feed.', 0Dh,0Ah
     db 'you may hear a beep', 0Dh,0Ah
     db '    when buffer is overflown.', 0Dh,0Ah
     db 'press esc to exit.', 0Dh,0Ah, '$'

end