[syslinux] Re: Does pxelinux work with >1GB RAM?

H. Peter Anvin hpa at zytor.com
Mon Oct 7 17:35:17 PDT 2002


H. J. Lu wrote:
> On Mon, Oct 07, 2002 at 05:22:25PM -0700, H. Peter Anvin wrote:
> 
>>H. J. Lu wrote:
>>
>>>I am not sure if the stack usage is really an issue. Intel PXE doesn't
>>>use any memory below 3MB. However, pxelinux uses memory between 0x1000
>>>and 0x7c00 for various buffers. According to PXE 2.1 spec, memory
>>>between 0x500 and 0x7c00 are reserved. I don't know if it makes a 
>>>difference.
>>>
>>
>>The PXE 2.1 "spec" is unbelievably unclear on what is spec and what is
>>sample usage.  0x500..0x7c00 is in use by all standard bootstrap
>>programs.  DOS loads at 0x700.
> 
> Although it looks very ugly, moving buffers after the code makes
> pxelinux to work with Promise BIOS.
> 

Yet another reason why the Promise BIOS is too ugly to live.

	-hpa





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