Int 33 Fn 0073  - Mouse Systems Mouse Driver V7.01+ - Get Button Assignme  [M]

   AX = 0073h
   BX = CDEFh
   ES:DX -> 3-byte buffer for button assignments

Return: CX = number of buttons???
   ES:DX buffer filled (default is "LMR")

Note:  also supported by Genius Mouse 9.06

See Also: AX=0067h