| 摘要 |
PROBLEM TO BE SOLVED: To prevent overrun at the time of data transfer by identifying a connection destination connected to the plural signal lines of an interface, setting the priority order of the identified connection destination based on the priority order of the connection destination stored beforehand and mediating signals simultaneously inputted from the plural signal lines to the interface corresponding to the set priority order. SOLUTION: When power is supplied, a CPU 206 reads the sense of the presence/absence of extension I/F board connection to a slot 1210 and the ID data of a connected extension I/F board corresponding to the program of a ROM 208 and stores them in a RAM 209 or the like. Then, the sense of the slot 2211 and the ID data are read and stored. The priority orders of the respective kinds of the extension I/F boards are decided for the respective ID data in the ROM 208 beforehand and the CPU 206 decides the priority orders of the slot 1210 and the slot 2211 based on the priority orders. Thus, the possibility of the overrun is suppressed to be low. |
