PDP 11/34 Settings

Tarsi, I do have a working 11/34A, so first, we need to make sure we have the same pair of processor boards (one board is "control", the other "data path"). I am not currently at home, but IIRC, the older 11/34 has boards labelled something like M725x, while the later 34A has M825x boards, with x being two consecutive digits for both boards in a pair. Whatever boards you have, once we know the M numbers, I should be able to look up the desired info from some piles of documentation. It may also depend on the boot ROM board. There is probably either a M9301 or a M9312 board in your backplane near the processor, and there may be additional jumpers on these boards that need to match your configuration, such as termination for certain bus lines. In addition, there need to be boot PROMs matching your boot device and controller. So, please let me know precisely which boards are involved, and I'll certainly find the information you need. Regards, Andreas Tarsi wrote: -- Andreas Freiherr Vishay Semiconductor GmbH, Heilbronn, Germany http://www.vishay.com