Program writable IC card with memory for storing program write control program

摘要

A program writable IC card includes a memory 3B for storing a program write control program. The write control program converts a program code that is input from an external source and stores it in a memory 4. The IC card may include two microprocessors 1, one of which can be accessed by programs produced by authorised parties, while the other can be accessed by external programs written to the memory 4 by the write control program.