MicroVAX II - TK50 problem

On Fri, 11 Mar 2005 01:15:44 -0700, John Willis <willisjo at zianet.com> wrote: Glad to hear it... but I didn't catch what kind of box this is in... my suggestion is valid for a BA23, but not a BA123. Given that you drew 9 slots, I figured you had a BA23, but feel free to correct me. Hmm... if you weren't getting interrupt and DMA grant passed, the machine wouldn't boot because the RQDX3 wouldn't be able to interrupt/make DMA requests (a side benefit of putting it last, I suppose - no boot is an obvious sign problems, whereas a machine that boots, but has problems with a device behind the RQDX3 might be harder for a novice customer to grasp the situation of). It's more likely there's a configuration problem than broken hardware, but that doesn't mean that it's impossible that you have an actual DHV11 problem. I just don't remember seeing device timeouts on serial adapters since most problems will make them not show up at all. I no longer have a copy of your "show device TX" output, but I take it you _have_ tried putting a terminal on TXA0 and pressing return a couple of times? Have you put a terminal on there and tried outputting any text to it (a DCL command procedure or a C program should do the trick)? One can attach serial printers to random ports, if you didn't know that. They aren't just for logins (when they are working, that is). I do not recognize either the HX designator or the DRQ3, but it sounds like some kind of DMA-based parallel interface. Perhaps you could try running the system with that out? I doubt there's an interrupt conflict, but testing with the simplest machine possible is a good technique to use to keep the number of variables down. Right... that _is_ parallel I/O... not typically used for printers, but can be used to interface to odd external logic, or some such. -ethan