PERIPHERAL DEVICE CONNECTION CONTROLLER

PURPOSE:To enable speedy adaption to connection changes of various peripheral devices after a system is actuated. CONSTITUTION:An optical disk driver 13 is expanded on a memory by a kernel 12 as the basic control part of an OS and a device information table 14 and a medium control table 15 are set to initial values that the driver itself has. When devices which are actually connected are changed as transactions are changed, the I/O control of initial setting processing that the driver 13 offers adds the device information table 14 and the medium control table 15 where the use states of the devices are recorded through device information setting processing 16. Further, the medium control table 15 is backed up to a medium control information file 19 by the I/O control of medium control information backup processing 17 that the driver 13 has.