View source for Driver:Soviet PDP-11s

Soviet Union built many systems with Digital Equipment Corporation's PDP-11 ISA -- some were straight-up clones of PDP-11 models, down to the chipset, others reimplemented the architecture -- see http://www.dbit.com/pub/pdp11/faq/faq.pages/Soviet11s.html for background information.  They were used much like the originals -- for timesharing, industrial process control, data acquisition and so on, including personal computing and embedded use.

Out of all PDP-11 processor variants, MAME currently emulates only T-11 single-chip CPU, intended for embedded applications.  DEC VT240 terminal (and its clone, [[Driver:Soviet terminals|Elektronika MS 7105]]) uses it, along with another Elektronika system, MS 0515 -- an unusual choice for a desktop.   MAME emulates both of them.  Other professional PCs (DVK series), educational machine (UK-NC aka Elektronika MS 0511) and home computers (BK-001x series) used K1801 chipset, which is not emulated.

However, it is possible to use MAME as a terminal emulator connected to a simulated PDP-11 running in SIMH.  As an example of this, the [[MAME_and_SIMH|linked guide]] shows how to install RT-11 operating system in a simulated PDP 11/23.

== Elektronika MS 0515 ==
A rather obscure machine, possibly intended as educational or gaming system -- video memory layout is clearly inspired by ZX Spectrum, and a few ports of Spectrum games exist.  Was designed and built by the "Processor" firm in Voronezh (same place that produced many other PDP-11 clones).

MAME driver name is ms0515.   Hardware emulation is not 100% complete, but enough to boot the operating systems (OSA and Omega, a/k/a modified DEC RT-11) and run the games:

Saboteur 2 port

[[File:MS0515 Saboteur.png]]

Stop the Express port

[[File:MS0515 Stop the Express.png]]