DSKMOTOR          240 drivers/block/amiflop.c #define MOTOR_ON	(ciab.prb &= ~DSKMOTOR)
DSKMOTOR          241 drivers/block/amiflop.c #define MOTOR_OFF	(ciab.prb |= DSKMOTOR)
DSKMOTOR          409 drivers/block/amiflop.c 		prb &= ~DSKMOTOR;