Irisha -- yet another i8080-based school computer, a backplane-based design. This one never went into mass production. Apparently processor board could be replaced with i8086-based one, and peripherals were designed to be somewhat compatbible with IBM PC.
MESS status -- skeleton driver, working keyboard but no peripherals (cassette, floppy, game ports), incomplete video implementation (it's CGA-like, with 320x200 and 640x200 modes), memory banking not emulated etc.
Other emulators -- Bashkiria-2M
(has most of the above).
Technical manual (has ROM dumps, schematics, PCB layouts) -- http://emuverse.ru/downloads/computers/Irisha/docs/Irisha%20Personal%20Computer.djvu
Software: not found/dumped yet. Apparently there was a CP/M port.