How can i do DOSBox Assembly mouse events

Question

I've just started to learn the "assembly" language.

How can I print "Hello World" every time I left-click with the mouse and print "Bad World" every right-click on DOSBox.

Answer 1

I think I found the solution to the problem.

  program SEGMENT
  ASSUME CS:program,DS:program
  ORG 100h

First we need to call mouse cursor.Check for catalog http://stanislavs.org/helppc/int_33.html

  start:
  MOV AX,01
  INT 33h

http://stanislavs.org/helppc/int_33-5.html We will not use other bits except the last two bits, so we made the rest zero with AND operator.

  loop:
  MOV AX,03
  INT 33h
  AND BX,3h

We compare the rotated value,and send the function according to the result

  CMP BX,1
  JE  left
  CMP BX,2
  JE  right

  cmp BX,0
  je  endss
  cmp bx,3 
  je  endss
  right:
  MOV DX,OFFSET stringright
  MOV AH,09h
  INT 21h


  jmp endss
  left:
  MOV DX,OFFSET stringleft
  MOV AH,09h
  INT 21h

  endss:

  jmp loop
  stringright DB "Right Clicked $"
  stringleft DB "Left Clicked $" 

  INT 20h
  program ENDS
  END start