[HECnet] DECnet for DOS / Rainbow documentation?

because that I think the 3C501 was one of the very early ISA bus Ethernet cards, wasn't it? It certainly preceded the DEPCA. At one place I worked in the mid-late 80s we had a bunch of the 3Com cards and used DECnet/DOS. I don't remember having any serious problems with it, but we didn't have that much network traffic. As they say, it was enough that the bear could dance at all; it didn't matter that it couldn't dance well. I was looking around and the README file in the archive for DECnet/DOS v2.0 (it's on diskette #9) has some tips for tuning the 3C501 card, so it clearly was supported in that release. I also see that the release notes for DECnet/DOS v1.0 have a lot of stuff about the Rainbow, but in v2.0 all mention of the Rainbow seems to have disappeared. I guess that's when DEC dropped it and it's probably why I never saw it before. Bob