These are FD images I could recover.

dos211.imd is MSDOS 2.11, adapted to Slicer. Format std 360K IBMPC 40 Trk.
This is probably an originally shipped disk.
dos211_unpacked.zip contains the unpacked files

bios.imd is a Slicer BIOS source code disk. Format std 360K IBMPC 40 Trk
This is probably an originally shipped disk.
bios_unpacked.zip contains the unpacked files

bios37n.imd is an 80Trk 5*1024 disk supposedly containing BIOS 3.7N source.
This is probably an originally shipped disk.

bios38.imd is an 80Trk 5*1024 disk supposedly containing BIOS 3.8 source
This is probably an originally shipped disk.

cpm86.imd is a disk probably in CP/M-86 format (40*8*512) containing C source code
of some CSE editor. This is likely an application disk.

dos80trk.imd is an 80 Trk 5*1024 disk containing MSDOS 2.11. This also contains
some unknown programs which might be user code, as well as parts of Microsoft CodeView 
and C compiler. This is likely an application disk.

dos812k.imd is an 80TTrk 5*1024 disk containing some parts of MSDOS 2.11.
This is likely an application disk.

videosrc.imd contains a86 assembler sources for supposedly the PC extension board 
(640x200 video board), probably the video BIOS source. This is probably an originally
shipped disk.