THANK you very very much for all your mails ! I have now just to make the copy file function. The other are finished. I will use the registers to pass parameters. Someone told me that there might be such described routines in the TI92+. He is right ! But I think I will release my lib. When ? I don't know. I have first to test it in ALL the situations. So maybe next week, or next next week ! Thanks ! Benoit SCHERRER