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.

    BUGS
	None.

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