Today, there was someone asking here for a Russian transistor equivalent. So it occurred to me, "hey, there are Chinese AVR clones, so maybe there are Russian clones also?"
So I went searching, and indeed I found this manufacturer catalogue: http://niiet.ru/wp-content/uploa...
There are clones of many things, but in particular, a clone of the Mega128, called 1887ВЕ7Т of which I also found the datasheet: http://caxapa.ru/parts/files/nHs...
Unlike the Chinese AVRs from Logic Green, this one seems to be an exact and shameless copy of the Mega128. I wonder if all cheap mega128s you can find on Ebay and AliExpress are actually ripoffs like this?
From the datasheet pag. 465 it seems to have a feature/known bug, that is, the bootloader flash section has pages of 32 word size, instead of the normal 128 words. This might cause problems programming this section using the settings for the Mega128.
From the datasheet prologue:
At the present time, one of the main factors ensuring the competitiveness of Russian radio electronic equipment and its survivability is the use of an import-independent information base for its development and production. Import substitution of electronic components is most effective when full functional analogs of the microelectronics product are used.
This (document) can serve as a practical guide for the use of microcontrollers for developers of systems based on IC 1887VE7T.