It's been a while since I asked, and I would be extraordinarily surprised if the situation had changed, but I thought I might try my luck one more time...

The 3B2 is a dreadful computer, but nevertheless I find myself compelled to try to make the SIMH 3B2 emulation more accurate. The emulation for the 3B2/400 is probably as accurate as it's ever going to be, but the 3B2/700 has very clear and known bugs. One of the things holding back fixing those bugs is documentation in the form of source code. I have the leaked kernel source code for the 3B2/400 ("Version 2") architecture, but I have never seen any kernel source code that targets the 3B2/700 or /1000 ("Version 3") architecture. All I have are the system header files from /usr/include/sys, nothing more.

If by some chance you have a /usr/src/uts tree for the 3B2/600, /700, or /1000, I would love to see it. It would refer to the system board using the code name "FALCON", probably with a lot of #ifdef's (at least the system headers do)

-Seth
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  Seth Morabito * Poulsbo, WA * https://loomcom.com/