Can't boot with 550K of memory

[Krzysztof Leszczynski]

Hi,

I'm sorry if this is a FAQ but I browsed the whole 4MB
bug-grub.mbox and didn't find any answer.

I use pxegrub with ALLWELL network client, it reports
(550K lower / 317744K upper memory), when I tried to tftp a
bzImage it says the kernel is too big. I found in grub/stage2/boot.c
>      /* FIXME: SETUP_SECTS should be supported up to 63.
>        But do you know there are >640KB conventional memory machines?  */
>      if (mbi.mem_lower >= 608 && setup_sects < 60)
>       {
and changed 608 to 549, now it loads bzImage but then it
hangs. Then I changed in shared.h
- #define LINUX_SETUP               RAW_ADDR (0x90000)
+ #define LINUX_SETUP               RAW_ADDR (0x80000)
and the DEF_INITSEG to 0x8000 in linux/include/asm/boot.h

It still hangs. Is there anything I can do to network-boot my
machine?

Thanks

Chris