| 摘要 |
<p>PURPOSE:To prevent a main body from being robbed or stolen by forcedly turning the main body of the computer to an operation disable state and executing key lock in the manner of a hardware by cutting power supply off against illegal carriage. CONSTITUTION:A P sensor 41 is turned on according to an installing pressure change in the case of changing the main body of the device from the installed state to the clamped state after steal-proof is set valid, a C sensor 42 is turned on according to the inclination change of the main body of the device, the states of the respective sensors 41 and 42 are held in an I/O register (parallel I/O) 7, the contents are read into a power source control processor 2, and the states of the sensors 41 and 42 are discriminated. When either the sensor 41 or 42 is turned on at least, an alarm generator (BZ) 43 is activated under the control of the power source control processor 2, an alarm is raised to the outside, a command for cutting power supply off to a DC/DC converter 34 is transmitted to a switch circuit 33, and the output power supply of the DC/DC converter 34 is forcedly cut off.</p> |
