Some progress with my PDP-11/73 system

On 09/04/2007 03:25, David Betz wrote: XXDP comprises a large set of diagnostics programs, and the names are encoded according to function. In this case: Z -- any PDP-11 processor RQ - diagnostic for the RQDX series C -- third diagnostic in this set H -- eighth revision of this diagnostic 0 -- patch level 0 (ie not patched) See the first few pages of http://www.dunnington.u-net.com/public/PDP-11/XXDP.pdf Since the controller handles the RX50 OK, almost all of it must be working. If the LED on the RQDX3 goes out a few seconds after resetting, with the RD54 disconnected, the RQDX3 has passed its self-test. From the error, I'd say possibly the RD54 has never been formatted on an RQDX3, or more likely something is wrong with the jumpers or connections. Double check that the drive select jumper is correct (normally it should be DS3; does the drive's LED flash when you run ZRQC?), that the little control board in the front of your BA23/BA123 with the READY and WRT PROT buttons is properly connected and those switches are set correctly, and that the cables from the distribution panel are connected correctly (with both the RD54 cables connected to the lower-numbered port). It's just possible you have too old a version of the firmware on the RQDX3 (what are the EPROM numbers?) or that its jumpers (eg W23) are set wrongly, but this is less likely I think. -- Pete Peter Turnbull Network Manager University of York