FUNCTION EXTENDING DEVICE, DATA PROCESSOR, DATA PROCESSING METHOD FOR DATA PROCESSOR, AND STORAGE MEDIUM HAVING STORED COMPUTER-READABLE PROGRAM THEREON

摘要

PROBLEM TO BE SOLVED: To manage identification information for identifying a function extending device mounted on an arbitrary data processor in the function extending device and to freely construct such use environment that makes a user confirm the contents of the function extending device when it is mounted and limits its use according to the identification information. SOLUTION: The function extending device is equipped with a flash ROM 4 and a one-time PROM 5 inside and the identification information inputted from the data processor is written to one of the flash ROM 4 and one-time PROM 5 and managed thereafter in an unwritable state; when the function extending device is mounted on the data processor, the identification information is retrieved and displayed.