GTCO Summagrid IV - Users Guide Part 1 - Manual (Page 26)

Summagrid IV 26
NOTES:
 When using the BA (Base Address) option, all four digits must be specified.
Example: Com 1 - \BA03F8
 Use the \BA switch only when the serial port is located at a non-standard
address within the computer.
/C3
/C4
/C16
/CM####
Three-button stylus
Four-button cursor
16-button cursor
Allows a user-defined mapping of the cursor/stylus buttons. The
\CM argument is followed by 1-4 digits that specify which
stylus/cursor switches are assigned to standard mouse buttons.
Each digit represents that value of a stylus/cursor switch and its
position after the \CM argument represents the mouse button that it
is assigned to. The first digit after the \CM argument corresponds to
the left mouse button, the second digit to the right mouse button,
the third digit to the middle mouse button and the fourth digit
corresponds to an emulation of both the left and right mouse
buttons being pressed simultaneously.