The floppy disk controller was part of the DVK1 complex
- Dialog Computing Complex - a family of Soviet computers
in the mid-1980s and early 1990s.

Performed by DVK "Electronics N MS 01100.1-02" the kit
includes: alphanumeric terminal 15IE-00-013, a block for
interfacing with a microcomputer MS 1201.01 and a controller
KNGMD (MX :), a dual drive on a flexible magnetic disk
"Electronics NGMD 6022 ", UVVPCh, 15VVP80-002 or DZM-180
printing device. Custom ROM not installed.

Schemes and description of the controller from the link below

http://ruecm.forum2x2.ru/t114-topic