Dear Oleg,
>> I can communicate with the author of RT-11 emulator -
http://archive.pdp-11.org.ru/EMULATO...1_Emulator.rar
didn't know about this emulator.
seems the rt-11 operating system and utilities are all build into rt11.exe
it isn't open source as far as I see from inspecting the archive.
the doc is very sparse.
found no info if it emulates LSI-11 or PDP-11.
though FPU or FIS emulation is not a requirement,
I'd need MMU hardware emulation.
no info about memory layout (how much address space is available for user programs?)
and I/O-page access (for MMU).
>> If you are interested, we can ask him how easy it is to build this emulator for Linux.
if it emulates MMU hardware under kind of unmapped RT11SJ
it might be interesting to try out under Linux in VirtualBox/Win 2000.
though I probably wouldn't invest any time to work with non-open source tools.
best
g.