Grub cannot work with memdisk when loading big images

[Frederic Corne]

hello,

I have a problem like the ones reported by bugs :
http://savannah.gnu.org/bugs/?func=detailitem&item_id=4069
http://savannah.gnu.org/bugs/?func=detailitem&item_id=836
http://savannah.gnu.org/bugs/?func=detailitem&item_id=795
http://savannah.gnu.org/bugs/?func=detailitem&item_id=793

When i'm trying to boot dos-image (a 1.4 floppy) using memdisk (from 
P.Anvin) through ethernet, grub boot correctly. I get the dos prompt.

But if i try to boot a big (122Mo)windows image , it hangs just after 
downloading the file. The machine has plenty of ram (more than 384Mo).

I have tried with 0.94 version and the latest CVS 0.97

 ./configure  --enable-diskless --enable-3c90x --enable-eepro100 
--enable-lance --enable-3c595

%menu.lst
# 12.
title Windows
   debug
   root (nd)
   kernel (nd)/win/memdisk
   initrd /win/win.img
   boot


the "boot" never appears

in debug mode , the little indicator (-) spins when downloading the file 
 , then rotate very very slowly, then stop . I have to reboot.

With pxelinux and the same memdisk and windows image , it works nicely
default config :
DEFAULT net
PROMPT 0
LABEL local
      LOCALBOOT 0
LABEL net
      KERNEL memdisk
      APPEND initrd=win.img


any hint ?

Thank you in advance.

FC