I infer from your inquiry that there is no formal statement of the ISA for
the machine. Is that correct?
On Sat, Sep 30, 2023 at 1:57 AM Seth Morabito <web(a)loomcom.com> wrote:
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
--
Seth Morabito * Poulsbo, WA *
https://loomcom.com/