Both solutions work for my application ! Thanks a lot. I think I will use one of them, even if I know it's not really "clean".
Thanks again,
Alain
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On Wed, May 09, 2012 at 08:44:45PM -0400, Kevin O'Connor wrote:
On Wed, May 09, 2012 at 08:57:53AM -0700, Alain Ribière wrote:
I wonder what is the CDOS system at 0D4000... It seems a bit strange.
Very odd. This is still controlled by seabios. Indeed, if I apply this (clearly incorrect) patch to seabios:
diff --git a/src/shadow.c b/src/shadow.c index c0c8cc2..73c0670 100644 --- a/src/shadow.c +++ b/src/shadow.c
[...]
Just for kicks, I tried a simple hack to try and reserve more memory in the c/d/e-segments, and it seems to work for the image you posted. Run:
python -c 'import sys; sys.stdout.write("\x55\xaa\xc8\xcb\x6e" + "\x00"*(100*1024 - 5))' > dummy.rom
and then add "-option-rom dummy.rom" to your qemu command line. (The idea is to build a 100K dummy option rom that seabios will load and mark as read-only memory.)
-Kevin