Hello Fellow Listers, I am indeed new to the list, but also very glad I joined it/found out about it. I have 1 each 11/23 Dec system, and 1 each 11/24 system. The 23 system is setup with 2 pairs of RX-02 floppy drives, the 24 is setup with a second source HD system, with a removable disk pack, I think 10 MB, not sure. Along with a large plethora of micro-computers of the S-100 and desk-top type. Used to be a field applications engineer doing hardware installs and setups of Dec equipment. My memory tends to wander all over the place but here is an attempt at the subject. For the ASR-33 interface The DLV11 boards had a strapping arrangement to connect to the the ASR-33. First a few questions. What is the state of the TTY before you connect it to the DEC system? As in when in "LOCAL" mode can you type and see the characters that you are typing? When you look at the cabling from the ASR-33 how many wires are in this cable, this determines if it is setup for current loop operation, or if it has an internal RS-232 or RS-488 interface (different setups). Next if you have it connected correctly to the DLV11 is it indeed on the first I/O port on the board? That would would be the "Old Master Console" for the system administrator. If you could answer those questions I may be able to guide you towards getting the TTY connected. Jim WB2FCN http://eshop1.chem.buffalo.edu Nico de Jong wrote: