I need PDP-11/34A Help Again (Suprise Suprise)

Owen, still interested in getting your PDP-11/34 to work? - I am just about to reassemble mine after relocation. RUN light off and display 000002 means the processor halted at memory location 2, so it has probably executed a HALT instruction (opcode 000000) from location 0. Try this: while holding the CNTRL button, press BOOT. This should launch the program from your ROM. Depending on which type you have (look for modules labeled M9301 or M9312 in slot 3 or 4, whatever is next to the processor), your milage may vary here. The console terminal should print four numbers in octal, followed by an "@" or a "$" as a prompt in a new line ("Dave, my mind is going..."). Depending on the ROM, you may need to enter either 773000G (standard start address and GO command, pressing the return key is _not_ required here) or a two-letter device code to boot. The bootstrap module may also be wired to boot from a predetermined device without asking. BTW: The DL11-W has 20mA drivers as well as RS-232. (Note the "1488" and "1489" chips being present as well as a number of transistors and other discrete components.) Which set is used depends on the cable: the plug will have some wire connections to code it for either 20mA current loop or RS-232 / V.24. If you have the original cable with the usual DB-25 connector, it should be OK: current loop used a completely different 6-pin "Mate-n-Lock" connector. For the settings at the terminal, I don't know your particular type, but with most DEC lines you should be best prepared if you use XON/XOFF handshake (for "Main Rcv Hndsk" / "Main Xmt Hdsk"). Since at PDP-11 times, the 8th bit was commonly used as a parity bit, set your terminal to ignore this. Otherwise, you may get garbage characters instead of about every second readable character. We may get this straight later, when we know what operating system you have. A RS-232 break signal can sometimes cause a PDP-11 to HALT (depending on settings on the DL11-W board), so you may want to avoid this... (perhaps by choosing an appropriate setting for the "Disconnect" option for now?) So much from memory. If you need more details, let me know, and I'll dig into the docs. Good luck, Andreas -- Andreas Freiherr Vishay Semiconductor GmbH, Heilbronn, Germany http://www.vishay.com