Interpreting Vaxstation 3100 memory error

Hi all -- Picked up a Vaxstation 3100 today at the SRCS meeting. There is some minor corrosion on the memory and motherboard PCBs, some due to prolonged exposure to moisture, and some due to a leaking clock battery. I've cleaned up the corrosion and it doesn't appear to have done any serious damage. At POST it identifies itself as a KA42-A, which I believe makes it a Model 30. I'm getting error messages from the POST and I'm unsure how to interpret them -- the manuals have not been 100% clear. Here's what I get: KA42-A V1.3 F...E...D...C...B...A...9...8...7...6...5...4...3_..2_..1?.. ? E 0040 0000.0005 ? C 0080 0000.4001 ? B 0010 000C.0081 ?? 1 00C0 0011.700E The (E) error I expect since there's no clock battery. The (C) is also expected since I don't have a keyboard/mouse plugged in (just using the serial console). Similarly, (1) is also expected since I don't currently have the ethernet interface hooked up to anything. (B) is what's confusing me -- my understanding is that a single question mark indicates a "soft" error, described in the manual thus: "Usually, a question mark (?) in the power-up summary indicates a soft error and the system may be usable without replacing any FRUs." OK. What does that mean for memory, and how do I interpret the error code? I know that the "000C" part indicates the amount of memory installed -- what does "0081" mean in this context, and should I be concerned? For further reference, "test 50" gives the following for memory: ? MEM 000C.0081 00400000 The machine does boot (VMS 6.0 off of two very noisy 104MB drives) and it seems to work OK, though I haven't stressed it much yet. Any suggestions here would be much appreciated. Thanks! Josh