Software control system in external storage device

Abstract

Abstract PURPOSE:To remove an irregular external storage device and to check the flood of inferior software by discriminating whether an external storage device is regular or not and determining whether the operation of an inner circuit in a body is allowable or not on the basis of the discriminated result. CONSTITUTION:An IC 14 for locking the body 1 compares an operated result inputted from a key IC 24 in a ROM cartridge 2 with a result operated by the IC 14 itself. When both the results are different, the reset status of respective circuits in the body 1 is held and the execution of a game program is inhibited. When both the values coincide with each other as the compared result, the reset status of respective circuits of the body is released. Then, the ICs 14, 24 generate random numbers '1', '2', and at the random number '2', an operation expression is selected out of n kinds of expressions and random numbers '1', '2' are substituted to operate the expression. The IC 14 supplies the operated result to the IC 24 and the operated result of the IC 24 is received by the IC 14. The IC 14 compares the received result with the result of the IC 14 itself, and when both the results are different, stops a CPU 12. In case of coincidence, the IC 14 returns again to the operation for generating random numbers and repeats arithmetic processing.

Inventors

• 👤 Katsuya Nakagawa
• 👤 克也 中川

Bibliographic Details