[syslinux] Question Regarding MEMDISK from HP

H. Peter Anvin hpa at zytor.com
Wed Mar 6 11:49:31 PST 2002

HU,DAVID (HP-Cupertino,ex3) wrote:

> Dear Mr. H. Peter Anvin,
> I am trying to figure out the physical address of where the PXE DOS image
> (downloaded in PXE) is stored by MEMDISK in the Extended Memeory.  Is it at
> E98000h as specified in the PXE spec or the address to is random.  What I am
> trying to figure out is a safe range of extended memory segment (100000h to
> E98000h), where HP tools can safely allocate extended memory in DOS without
> corrupting the ramdisk loaded in PXE.  Thanks for your time, and I am
> looking forward to hearing from you.

It is near the end of memory.

MEMDISK traps INT 15h and hides the memory it occupies, so as long as
you're using INT 15h to query the memory size (if you're using HIMEM.SYS
to manage XMS memory it should do this automatically) you should be fine.


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