I have been working to validate the FreHD hard disk emulator ( http://www.vecoven.com/trs80/trs80.html) with the Kaypro. Good progress on the 4/84 with the Advent TurboROM but I want to validate it on my 4/83 also. (Unfortunately finding a 4/84 is not so easy..... Kaypro are not very common in New Zealand so I am stuck with the 4/83 but also very keen to try and get it going). Searching for the TurboROM for the 4/83 has been unsuccessful. The available ROM's on the internet are the 84 version (8k). I have seen several requests for it on different sites but no ROM unfortunately and no "hey look what I discovered" posts. After reading the TurboROM notes in this really good overview document ( ftp://ftp.barnyard.co.uk/cpm/walnut-...O/TURBOROM.DOC) and some work with a disassembler on the '84 ROM I have confirmed that it is specific to the machines with the 6845 video controller so modifying the 4/83 to use an 8K rom isn't enough. Hoping that someone on the list may know a source for the Advent TurboROM for the 4/83. Regards Andrew