https://gist.github.com/shattered/7517008 -- minor WIP for besta, mc1502 and mikrosha.
http://www.sendspace.com/file/lblltk -- the new dump

A good dump of 'One-Track System' (works in mc1502, but apparently was designed for poisk1) surfaced (thanks to dk_spb) -- this is a weird, somewhat DOS-compatible OS, that fits on a single disk track (which is track 82 and therefore is missing from all existing dumps). Will softlist it soon:
[Linked Image from img-fotki.yandex.ru]