DOS Mouse Interrupt 33h

AH = 0

Initialize mouse driver. Returns: AX = number of buttons

AH = 1

Turn mouse on

AH = 2

Turn mouse off

AH = 3

Report status. BX = Mouse button pressed (1 - left, 2 - right, 3 - centre), CX = X-coordinate, DX = Y-coordinate

AH = 4

Get mouse position

AH = 5

Button press information

AH = 6

Button release information

This documentation is incomplete. If you have corrections or additions, please let me know.