I have a project of making a stop watch in assembly language using masm. The stop watch starts on program startup and continues on. I want to implement feature like stop,pause and play. I can't ask user to input any value when the stopwatch is running as it is a loop and on each iteration the text on console updates every passing millisecond. I was thinking that it would be nice that before each iteration of the loop, I could check keyboard buffer or something like that which indicates that a certain key was pressed and use that value to detect and stop,puase or play the stop watch. I know its not true asynchronous solution but I can't find anything descriptive regarding my issue over the Internet.
My Code for stop watch: I want to do what I asked before doing call clrscr
Include Irvine32.inc
.data
milisec dword 0
sec dword 0
min dword 0
milidiv dword 100
secdiv dword 60
colon byte " : " , 0
.code
main proc
PR :
call clrscr
mov eax, min
call WriteDec
mov edx, offset colon
call WriteString
mov eax , sec
call WriteDec
mov edx, offset colon
call WriteString
mov eax , milisec
call WriteDec
;mili= mili+1
mov eax, milisec
add eax,1
mov milisec , eax
mov edx , 0 ;storing value 0 to remove the garbadge value
div milidiv ;divide eax by 100 and getting the quotionet from edx
mov ebx , sec ;move the value of second in ebx
add eax, ebx ;now adding the previous value of second and the next quotiont value
mov edx , 0 ;storing value 0 to remove the garbadge value
div secdiv ;dividing the ebx by 60
mov sec, edx ;moving the quotiont from edx to second
mov eax, milisec ;moving milisec to eax
mov edx , 0
div milidiv ;dividde by mili
mov milisec, edx
mov eax,sec
mov edx , 0
div secdiv
add eax, min
mov min, eax
mov eax , 100
call Delay
jmp PR
exit
main endp
end main