[syslinux] [memdisk] collision between memdisk and emm386 (FreeDOS)

[m4mach]

Hi

I'm using memdisk as part of CD Shell' isolinux. I've created custom floppy 
disk image 8440kB size. I've put FreeDOS kernel and bootsector into the 
floppy. Boot process goes fine with this command:

isolinux /boot/memdisk initrd=/ximg/fdos.img c=60 h=8 s=36 floppy

The problems begin when I try to run FreeDOS memory manager emm386 from the 
floppy image.

my config.sys:

...
1?DEVICE=HIMEM.EXE /VERBOSE
1?DEVICE=EMM386.EXE X=C000-C800 NOEMS /VERBOSE
...

System hangs (freezes) just after emm386 is loaded, leaving all information 
about memory (UMB etc.). There is no any error, everything looks like it 
loaded OK, but it isn't. I've tried a lot of command line options for 
emm386, but no effect.

The strange think is that when I did the same with 2880kB floppy image the 
problem completely disappeared! - In that case the only one suspect for me 
is MEMDISK, I think it has something with memory (difference between images 
size) - but I don't have any idea how memdisk allocates memory and why there 
is a collision between emm386 and memdisk??

Any ideas?