An information device system includes a terminal device and a personal computer.
The terminal device has a USB interface and a wireless transceiver circuit. The
personal computer has a USB controller which can communicate with the USB interface
of the terminal device when they are connected with each other, and also a transceiver
circuit adapted to wirelessly communicate with the wireless transceiver circuit
of the terminal device. A record medium, which can be read by the personal computer,
contains a program for judging what communication state the system is in, a cable
communication state, a wireless communication state, or a non-communication state,
and restricting processing the personal computer can perform in accordance with
the result of the judgment. The degree of restriction is lowest when the system
is in the cable communication state, intermediate when the system is in the wireless
communication state, and highest when the system is in the non-communication state.
