VERFAHREN ZUM BETREIBEN EINER DATENTRÄGERVORRICHTUNG MIT ABLAUFDIAGNOSESPEICHER

摘要

Method for operating a portable data carrier, whereby the data carrier is controlled using program code (100) stored in it according to a predefined sequence. According to the method, each sequence command is stored in a buffer memory (200) such that there is always a defined number of commands prior to the actually executing command stored in the memory and predetermined log information in relation to the code execution is stored in a code execution diagnosis memory, if an error function (2) of the data carrier is recognized. - The invention also relates to a corresponding data carrier with a CPU and executable code stored in it.