Patent ID: 6302795
Filing Date: 2001-10-16
Classification: A63F,G06F,Y10T

Abstract:
A data processing system wherein a sub unit is removably connected via a connector to a main unit that performs data processing, a data processing system comprising:a main unit having a program supply for supplying a program to said sub unit, said program being distributed as shareware;said sub unit having a storage device for storing said program supplied by said program supply and the time of communication with said main unit;a clock for marking time;a time comparator for comparing a usage time limit, which is a time limit until when said program is executable in said sub unit and which is obtained based on said time of communication, against a time obtained from said clock; andan execution control means that controls execution of said program based on the results of comparison performed by said time comparator,wherein said sub unit has a wireless receiver that receives wireless signals from outside, andsaid wireless receiver receives absolutely accurate absolute time information, andsaid current time obtained from said clock can be corrected based on said absolute time information.