On 2013-02-16 23:12, John Wilson wrote: From: <Paul_Koning at Dell.com> Well, I did now, and simh is right. Page 3-31 of the DELQA manual states that the first address is used as the source address for system ID messages. Which edition? I'm looking at EK-DELQA-UG-002 (from Bitsavers) and it can't find anything like that. I have the same edition (hardcopy) and I think the final paragraph on 3-31 is just being read wrong. They talk about the "first" physical address, but it seems like what they mean is the first address that's a physical address, not any address of any kind that's in the first slot of the SETUP packet. I take that to mean (and this is what E11 does) the LQA doesn't work the same way as the QNA, so while the QNA hardware may blindly accept anything that matches any slot in the SETUP packet, the LQA searches that list for the first non-broadcast/non-multicast address and takes that to be the One True Address, and that's what goes in system ID frames and gets set in the Ethernet chip as the station address for reception. That certainly seems like the cleanest interpretation, and DEC was pretty good about picking the clean choice over the quick-and-dirty one. I'm kind of swamped but if anyone's really lying awake nights worrying about this, I do have a real DELQA and a BA23 here that I guess I could set up with a bus adapter for testing (either under RSTS or I could hack up my XH: test code to try different stuff in SETUP packets). Lemme know. You are probably right, John, in which case simh does it wrong. Reading through the whole section over and over, it do feel more like it would scan through the list and grab the first non-broadcast address (no matter which column it is in), and use that one. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol