Dear Jim, I followed this thread and tried the "FTP" addresses that were given regarding downloading the Inverse Assembler Development Package. Sadly without success as the directory structure has been changed. Therefore is there any chance of obtaining the software from another source. Funnily enough I have the reference manual as this is downloads from a couple of web sites. I am currently building a 68008 based system and I would like to have an inverse assembler for the HP1650A that I will be hooking up to it. Regards, Rupert.