DIRXOR(OPCSDEFS)	Optical Printer Control System	       DIRXOR(OPCSDEFS)

    NAME
        dirxor - invert direction of motor; direction "exclusive or" (XOR)

    SYNOPSIS
        dirxor [chan] [invert]

    EXAMPLE
	dirxor b 1    # invert direction of the projector motor.
	dirxor c 1    # invert direction of the camera motor.

    DESCRIPTION
        After setting up a new motor, you notice that executing a command that
	should run the motor forward actually runs it BACKWARDS, and vice-
	versa, you can remedy this by either rewiring the motor (the hard way),
	or changing the DIRXOR(OPCSDEFS) command in your OPCSDEFS.OPC file.
	
	By changing the [invert] value from 0 to 1 (or 1 to 0, as the case
	may be) you can invert the software's sense of direction for that motor.

	[chan] is the motor channel being affected.

	[invert] can be either a 0 (default) or a 1, depending on which value
	         suits the installation.

    WARNING
        Changing this value in the OPCSDEFS.OPC file as a prank is a truly 
	nasty way to drive the next shift's cameraman completely nuts, and
	confuse the shit out of everybody who uses the machine after you.

    BUGS
	None.

    ORIGIN
	Gregory Ercolano, Los Feliz California 11/29/89