Hi Tony, i read an email of you in internet about HB 9825B. I would like to know if the CPU of HP 9825 works with little endian or big endian format. Do you have any information for me about this old computer ? I'm trying to write a small testprogram (windows 2000 / VC++ 6.0) for directing the HP analyzer 4145A. Its manual has a sample program for this computer 9825B. If you have any information for me ... it is very nice. Thanks alot Hoang