Method of changing object program.

摘要

To simply change a part of an object program including plural program modules stored in a RAM in a credit authorization terminal (CAT), for instance, a new program module is written in the RAM from outside and further an address of the new module to be jumped is written in a table for enabling a new module address designation. Further, when an object program and the table for designating addresses of modules to be jumped are both stored in a ROM, the table for designating the addresses of modules is once transferred in the RAM, whenever power supply is turned on. A new program module is loaded into the RAM and address thereof is also loaded in the table transferred in the RAM.