Hi Chris, I was looking at your thread relating to the Data I/O Manual and understand you have the manuals. I picked a System19 unit up a couple of years ago and it came with the Unipack & 001, 011 Adapters. The manual I have only relates to the Adapter Codes & I have no info on the Unipack Codes for Programming Chips. Do you have a copy of the codes as Data I/O are no help at all. Many thanks Best regards Brian