KA630 guru/tests?

Now that I'm back on the list, by dint of unsub + resub (which I really should have thought to do earlier, rather than waiting against the time Jay finally emerges from the aftermath of VCF East).... I'm trying to build a KA630 emulator, more because I think it'll be fun and will teach me stuff than because I actually have a use for such a thing (there are plenty of good open-source VAX emulators out there already). I picked the KA630 because it's the only VAX implementation I have enough information on to even really attempt to build a simulator for. I dumped the ROMs from one of my KA630s (e/l/p/n:3fff 20040000, plus some postprocessing of the capture file) to get firmware. But the emulated VAX hangs at selftest step B. The manual I have (EK-KA630-UG-001) says this means that the IPCR is not working properly (probably broken Qbus electronics, on a real KA630), but it doesn't go into any significant detail. Furthermore, if I break to the simulator and manually advance it past the "blbc r0,." that it's hanging at, it continues, but ends up with an error at step 7 - apparently it can't find any working memory(!). Now, the manual could be simply wrong. I've found it lying (or, let me be charitable, "not matching the machine I have") at once already; it claims certain bits are write-only, but the ROM code depends on being able to read them. Or I could be mis-emulating the Qbus stuff. Or I could have a bug in the emulation of an instruction somewhere. So, I'm looking for either or both of (a) someone who's enough of a KA630 guru to help or (b) some kind of VAX instruction-set test suite, to help verify that I have the instruction emulations right. (I caught one instruction emulation bug already, quite by chance; there is surely at least one more.) Thoughts? /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse(a)rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B