Спасибо!

вот суммарная информация в одном месте на английском языке, может кому пригодится

DVK MX format

FM, 300 RPM, 250000 bps

Possible disk types:
5"25 40 tracks, 1 side , Sector 256 bytes, 11 sectors per track, 112640 bytes formated capacity
5"25 40 tracks, 2 sides, Sector 256 bytes, 11 sectors per track, 225280 bytes formated capacity
5"25 80 tracks, 1 side , Sector 256 bytes, 11 sectors per track, 225280 bytes formated capacity
5"25 80 tracks, 2 sides, Sector 256 bytes, 11 sectors per track, 450560 bytes formated capacity


DVK is 16 bit computer
Bit order of 16 bit word on disk is 15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0


"New driver" MX Track format
1. Eight 0x0000 words and then word 0x00F3
2. Track number word
3. 11 sectors of the following structure
3.1. 128 words of data (256 bytes)
3.2. Checksum word
4. three words of the following format: MSB 0x83 LSB: track_number*2+side number
6. remainder of the track not filled

MX FDD controller always read or write track as a whole.
No access to individual sectors.

DVK disk images are DSK files.
Byte order LSB MSB
track-side data interleaved.
track 0/sector 1/side 0(lower disk surface) first