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Load ISO with MEMDISK using HTTP not TFTP

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#26 Wonko the Sane

Wonko the Sane

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Posted 28 February 2013 - 05:56 PM

Dont know what is raw related to memdisk, but didnt know either that it is memdisk problem.


If somebody have info about memdisk and raw, please explain for me and others... 

What is the difficult part?



d) MEMDISK normally uses the BIOS "INT 15h mover" API to access high
   memory. This is well-behaved with extended memory managers which load
   later. Unfortunately it appears that the "DOS boot disk" from
   WinME/XP *deliberately* crash the system when this API is invoked.
   The following command-line options tells MEMDISK to enter protected
   mode directly, whenever possible:
   raw Use raw access to protected mode memory.
   bigraw Use raw access to protected mode memory, and leave the
CPU in "big real" mode afterwards.
   int Use plain INT 15h access to protected memory. This assumes
    that anything which hooks INT 15h knows what it is doing.
   safeint Use INT 15h access to protected memory, but invoke
INT 15h the way it was *before* MEMDISK was loaded.
This is the default since version 3.73.





#27 gnikolic


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Posted 28 February 2013 - 08:18 PM

Hello Wonko!


Thanx for replaying.


I had a problem with starting whatever ISO (Linux, DOS, Win) and not booting. It starts to boot via TFTP or HTTP just fine, but when it try to start itself, WinPE or Acronis DiskDirector in Linux just restarts computer and Windows from Hirens (Unlegal; it is well know) stops from starting with that EXCEPTION error message.


After putting that RAW sub-command with memdisk, booting and starting any ISO file is just Ok. 

HTTP is some 2x (or more) faster than TFTP and It is solved.



#28 reboot12


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Posted 01 May 2013 - 10:04 AM

I confirm - I also helped RAW parameter to load the ISO over HTTP - exactly HBCD14 MiniXP


echo Mini WinXP HBCD 14
initrd ${url}/mxp14.iso
chain memdisk iso raw || goto failed
goto start

Edited by reboot12, 01 May 2013 - 10:05 AM.

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