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testing grub4dos on USB pen drive virtually?
mr_
Posted on: Jun 4 2009, 01:03 PM


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I use VMware + PLoP.
  Forum: Grub4dos · Post Preview: #68873 · Replies: 12 · Views: 3,356

Some ideas about a new grub4dos USB driver a few questions and facts
mr_
Posted on: Mar 31 2009, 07:50 PM


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QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
I was always looking to effective use the possibility to start grub from DOS.

Fact and statement.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
You can use Active@ NTFS Reader (freeware) or even better Active@ Uneraser (demo) to view all current active BIOS INT 13 services such as 80h, 81h etc. (demo version is fine enough)

In my mind it's a fact and anyone is free to reproduce it.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
Do this first, you see all device available thought BIOS, therefore also for grub4dos.

Description and reproducible fact.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
Then start USBASPI.SYS form Panasonic and check again with some Active@ product, you will see that there is a new BIOS INT 13 service. (For sure the USBASPI.SYS driver must have worked before for you in DOS for it's normal purpose.)

Description and reproducible fact.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
Now after starting grub4dos the "new" device will be unfortunately gone, I think this is because grub4dos completely collapses DOS (when started from DOS or always?).

For the underlined part: In my mind it's a fact and anyone is free to reproduce it.
The rest: is a guesswork.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
Maybe we can get some advantage out of this?

Yes, it's a question whenever the described behaviour can be turned into more useful results.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
Do we have another bootloader which is able to start from DOS? This bootloader could be used to start grub4dos while the "new" device still stays visible for grub4dos. I am only aware of dostowxp.com, ntldr.com, loadlin and LinLD.

It's a question for more bootloaders starting from DOS and telling those which I already know.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
Loadlin and LinLD probable also complete collapse DOS(?), while the dostowxp.com author told me that ntldr will see DOS as garbage in memory and just ignores it.

The non-underlined part is a question and the underlined part is a fact.

QUOTE (mr_ @ Mar 31 2009, 07:08 PM) *
Did someone has success in booting grub.exe with loadlin or LinLD? I always end up in a hang with invalid op code or getting upper mem (also from plain DOS without drivers).

The underlined part is a question and the second part is my experience.

QUOTE (jaclaz @ Mar 31 2009, 08:31 PM) *
Sure, which one is it? unsure.gif

Getting USBASPI.SYS to work as a BIOS extender so also grub4dos can use it.
  Forum: Grub4dos · Post Preview: #63649 · Replies: 5 · Views: 1,558

Some ideas about a new grub4dos USB driver a few questions and facts
mr_
Posted on: Mar 31 2009, 06:57 PM


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Ok, I adapted your advice.

Now back to the idea. cool.gif
  Forum: Grub4dos · Post Preview: #63647 · Replies: 5 · Views: 1,558

Some ideas about a new grub4dos USB driver a few questions and facts
mr_
Posted on: Mar 31 2009, 06:08 PM


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I was always looking to effective use the possibility to start grub from DOS.

You can use Active@ NTFS Reader (freeware) or even better Active@ Uneraser (demo) to view all current active BIOS INT 13 services such as 80h, 81h etc. (demo version is fine enough)

Do this first, you see all device available thought BIOS, therefore also for grub4dos.

Then start USBASPI.SYS form Panasonic and check again with some Active@ product, you will see that there is a new BIOS INT 13 service. (For sure the USBASPI.SYS driver must have worked before for you in DOS for it's normal purpose.)

Now after starting grub4dos the "new" device will be unfortunately gone, I think this is because grub4dos completely collapses DOS (when started from DOS or always?).

Maybe we can get some advantage out of this?

Do we have another bootloader which is able to start from DOS? This bootloader could be used to start grub4dos while the "new" device still stays visible for grub4dos. I am only aware of dostowxp.com, ntldr.com, loadlin and LinLD.

Loadlin and LinLD probable also complete collapse DOS(?), while the dostowxp.com author told me that ntldr will see DOS as garbage in memory and just ignores it.

Did someone has success in booting grub.exe with loadlin or LinLD? I always end up in a hang with invalid op code or getting upper mem (also from plain DOS without drivers).
  Forum: Grub4dos · Post Preview: #63645 · Replies: 5 · Views: 1,558

kexec-loader v2.0
mr_
Posted on: Mar 30 2009, 11:00 PM


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This sounds promising. I hope it's getting implemented.
  Forum: Project forge · Post Preview: #63601 · Replies: 45 · Views: 9,991

DOS ramdisk as Z:\
mr_
Posted on: Mar 30 2009, 02:43 PM


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Fortunately you find my idea useful.

Unfortunately I also thought and think you are right that this is not possible.

However, boot-land has come up with something great I've overseen.
  Forum: Grub4dos · Post Preview: #63584 · Replies: 5 · Views: 2,016

DOS ramdisk as Z:\
mr_
Posted on: Mar 30 2009, 01:22 PM


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I want to create a ramdisk with grub4dos like
CODE
# (booting from hd0,0)
title booting FreeDOS with additional ramdisk
rootnoverify (hd0,0)
map --mem /ram.img (fd0)
# or map --mem /ram.img (hd1)
chainloader /kernel.sys

The ramdisk is currently getting the drive letter automatically from DOS. I want to manually choose a fixed drive letter.

Letter Assigner doesn't help here because I am talking about pure DOS while Letter Assigner is for Win9x only.

xmsdisk and srdisk need XMS or EMS (and therefore an expanded memory manager such as EMM386).

grub4dos has the advantage that you can create a ramdisk but you can still stick in pure real mode as it doesn't need an expanded memory manager and no XMS or XMS. grub4dos can create a ramdisk "out of nothing but RAM" with the disadvantage that I have currently no way to control the device letter.

The question was how to overcome the this disadvantage and to explicit tell grub4dos which driverletter DOS should assign. Perhaps there is some trick to influence this.
  Forum: Grub4dos · Post Preview: #63582 · Replies: 5 · Views: 2,016

DOS ramdisk as Z:\
mr_
Posted on: Mar 30 2009, 11:48 AM


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Hi,

I am aware of regular DOS ramdisks but them have the disadvantage that you need XMS such as for xmsdisk.

With grub4dos an image can be mapped into memory while DOS can still stick to real mode (which do not need to be booted from that image, also another harddisk/image can be used).

I can map the image either as Floppy, then it's getting device letter A:\. If there is a legacy floppy then there is A:\ and B:\. But whenever an USB-device boots as A:\ while and Floppy and mapped Floppy also exists something will get C:\ which is actually not a harddisk.

So is it possible to influence the creation of a DOS ramdisk with grub4dos so it's getting an fixed letter such as Z:\ or T:\?

regards,
-mr
  Forum: Grub4dos · Post Preview: #63578 · Replies: 5 · Views: 2,016

UBCD50b12 with grub4dos support is out
mr_
Posted on: Mar 29 2009, 12:59 PM


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QUOTE (tinybit @ Mar 29 2009, 05:14 AM) *
@mr_

Thank you for your concern.

My body needs maintenance. I need a rest. I need some time to rehabilitation. Sorry.

Well, that's for sure much more important then grub4dos. I wouldn't create the final version first, your health must be the very first priority.

best wishes,
-mr

cheers.gif
  Forum: Grub4dos · Post Preview: #63533 · Replies: 45 · Views: 18,126

UBCD50b12 with grub4dos support is out
mr_
Posted on: Mar 28 2009, 10:45 PM


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QUOTE (Icecube @ Mar 24 2009, 11:01 PM) *
So it seems that I did implement the grub4dos menu for nothing innocent.gif .

I wouldn't say that. You've proven that grub4dos can be a full replacement for syslinux and helped the development with dozens of tests. Now and in future the grub4dos menu will be always a nice reference and maybe at some point the preferred default loader.

QUOTE (Icecube @ Mar 28 2009, 12:58 PM) *
Are you planning to stop after grub4dos 0.4.4 comes out?

QUOTE (tinybit @ Mar 28 2009, 07:26 PM) *
yes.

Will you focus on developing grub2 after that?

Do you plan to backport grub4dos's features to grub2?
  Forum: Grub4dos · Post Preview: #63513 · Replies: 45 · Views: 18,126

[howto] booting and using DOS on NTFS (or ext2/3/4)
mr_
Posted on: Mar 28 2009, 11:15 AM


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Hi,

not very revolutionary or something I have inverted new, it was all already there. However, I've compiled these instructions as it wasn't clear for everyone that this is even possible.

http://grub4dos.sourceforge.net/wiki/index.php/DOS_on_NTFS

regards,
-mr
  Forum: FreeDos and Dos · Post Preview: #63478 · Replies: 0 · Views: 1,115

[howto] adding USB support to grub4dos
mr_
Posted on: Mar 28 2009, 03:28 AM


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Hi,

it's now finally possible by using an external piece of software to load an USB stack and to make one USB-device available thought INT 13 and to use grub4dos's features on the "new" BIOS device.

http://grub4dos.sourceforge.net/wiki/index...LoP_Bootmanager

regards,
-mr
  Forum: Grub4dos · Post Preview: #63457 · Replies: 2 · Views: 1,009

MBRBatch 0.01 ALPHA
mr_
Posted on: Mar 27 2009, 09:32 PM


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jaclaz,

1) Imho this project should be moved to the Project forge. It's a shame to find this project only if you advise it. You could even think about hosting the project at an open source project hosting site.

2) I do not understand why you declare yourself as a non programmer, even Windows Batch is a scripting language. A scripting language is also variety of a programming language. Also for Windows Batch there are integrated development environments available.
  Forum: Project forge · Post Preview: #63431 · Replies: 50 · Views: 24,605

bootsector only booting
mr_
Posted on: Mar 27 2009, 09:23 PM


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Sorry I have no idea how I can let mbrbatch show me the size of the drive, tested the view command but it only shows a nice table.

However, Windows shows 2.115.174.400 Bytes in total, this means sold as 2 GB pendrive but 1 GB is still fine for testing.
  Forum: Boot from USB / Boot anywhere · Post Preview: #63429 · Replies: 16 · Views: 3,423

Ready to use DOS with USB?
mr_
Posted on: Mar 27 2009, 09:14 PM


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http://www.unet.univie.ac.at/~a0503736/php....php?n=Main.USB

QUOTE (Icecube @ Feb 12 2009, 09:05 PM) *
Sadly enough, as702 doesn't have time to update the image, last months.
He was adding the Ext2/Ext3/NTFS driver by Paragon (IFS for DOS). The last published image doesn't have it (at least for the moment) sad.gif .
http://www.ultimatebootcd.com/forums/viewt...php?p=5761#5761

How he can add Paragon IFS? It's commercial software?

QUOTE (Icecube @ Feb 12 2009, 09:05 PM) *
He was also working on a version with DR-DOS instead of FreeDOS, because some applications don't work with FreeDOS.

Can you tell me please which? I would forward it to the FreeDOS developers list.
  Forum: FreeDos and Dos · Post Preview: #63428 · Replies: 8 · Views: 3,242

[howto] using grub4dos as DOS CD-ROM driver
mr_
Posted on: Mar 27 2009, 09:08 PM


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Hi,

I've compiled some instructions how the grub4dos bootmanager can be "abused" as a CD-ROM driver for DOS.

http://grub4dos.sourceforge.net/wiki/index.php/Eltorito

regards,
-mr
  Forum: Grub4dos · Post Preview: #63427 · Replies: 1 · Views: 1,031

Pinned: Grub4dos Guide/Tutorial
mr_
Posted on: Mar 26 2009, 01:39 PM


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I am pleased to see instructions for creating the triple MBR (3x2), related topic, http://www.boot-land.net/forums/index.php?showtopic=7507.

QUOTE (jaclaz @ Mar 22 2009, 12:01 PM) *
You are not "missing" them, the appendix is about grub4dos commands.

The files you listed are not grub4dos commands, they are "external utilities".

Indeed, well I was seeing all this more as a package..

Still I would appreciate putting the syntax also for the external utilities also into the guide, in meanwhile I posted them into the grub4dos wiki.

QUOTE
As well in this last file there are details on the use of hmload.com and a link to the developer's page:
http://sysdocs.stu.qmul.ac.uk/sysdocs/Comment/GrubForDOS/

On this site I don't find the word 'hmload'.
  Forum: Grub4dos · Post Preview: #63322 · Replies: 77 · Views: 61,276

bootsector only booting
mr_
Posted on: Mar 26 2009, 01:15 PM


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QUOTE (cdob @ Mar 24 2009, 02:40 PM) *
Syslinux patch the boot sector to load file ldlinux.sys.
There is a absolute pointer. Solution is indepenent from CHS LBA translation.

The syslinux solution is interesting. I did
1) zero out sector 0
2) save removed and replugged the flash drive (no filter driver loaded)
3) no questions for initializing, just formatted fast with FAT
4) used syslinux on the new drive letter

result:
CODE
SYSLINUX 3.72 2008-09-25 EBIOS Copyright (C) 1994-2008 H. Peter Anvin
_

and hang. (as raw and with USB / PLoP Bootmanager)

This reminded me to try the same with grub4dos but it refused to install. (Yes, in windows device management I see that it is really physical disk 6.)
CODE
grubinst.exe (hd6,0)
grubinst: open: No error

and also
CODE
grubinst.exe (hd6)
Should be a disk image

Bug or feature?

QUOTE (jaclaz @ Mar 24 2009, 08:36 PM) *
mr_
remember that is you that are having a problem wink.gif, I am just trying to help you. smile.gif

I know and I am very glad that you are doing so. smile.gif

Thanks!

cheers.gif

QUOTE (jaclaz @ Mar 24 2009, 08:36 PM) *
Are you looking for a bootsector invoking NTLDR or one invoking IO.SYS?

1 GB
io.sys
  Forum: Boot from USB / Boot anywhere · Post Preview: #63321 · Replies: 16 · Views: 3,423

help creating the triple MBR with grub4dos
mr_
Posted on: Mar 24 2009, 08:25 PM


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QUOTE (tinybit @ Mar 24 2009, 08:44 PM) *
Here is a sample image with triple MBR:

It can act as both a floppy and a harddisk. You may use it as a bootable floppy, or as a bootable harddrive. It will boot to grub4dos in any case. You may try it first in your virtual machine.

Very cool, thanks for detailed answer. smile.gif

But triple has for me the sense "3". (For example USB-FDD + USB-HDD + USB-ZIP)

HD + floppy booting is "only" "2". I still do not understand where is the third?

cheers.gif
  Forum: Grub4dos · Post Preview: #63166 · Replies: 12 · Views: 3,495

help creating the triple MBR with grub4dos
mr_
Posted on: Mar 24 2009, 11:04 AM


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From readme_grub4dos.txt:
QUOTE
******************************************************************************
*** Use bootlace to create a triple MBR ***
******************************************************************************

This is typically used for USB drives, though it also works with hard drives.

Steps to create triple MBR:

1. Do a fresh FDISK to create a FAT12/16/32 partition starting at sector 95
(in LBA, that is, the begginning sector(MBR) is sector 0).

2. Install grldr boot sector onto the boot sector of this partition. See
section "Use bootlace.com to install partition boot record" above.

3. Get 96 sectors of the drive starting at sector 0(MBR), and save to file
MYMBR96.TMP.

4. Run bootlace.com:
bootlace.com MYMBR96.TMP

5. Put MYMBR96.TMP back onto the drive starting at MBR(sector 0).

Note: If the drive already has a triple MBR, then bootlace will cancel it
and restore the original partition layout.

For what is this good for? Is it to comply with USB-HDD, USB-ZIP and USB-FDD BIOS booting "standards" at the same time? Like makebootfat?

I do not understand how to create it and need some better instructions.

QUOTE
1. Do a fresh FDISK to create a FAT12/16/32 partition starting at sector 95
(in LBA, that is, the begginning sector(MBR) is sector 0).

How can I specify to create the partition starting from sector 95?

Is fdisk needed or does any more actual tool like windows device management console or linux fdisk also work?

If fdisk is needed, extracted from which DOS or Windows version?

QUOTE
(in LBA, that is, the begginning sector(MBR) is sector 0)

This confuses me. In CHS it's 95 and in LBA 0? This means creating a partition with fdisk like usual?

QUOTE
2. Install grldr boot sector onto the boot sector of this partition. See
section "Use bootlace.com to install partition boot record" above.

That's clear, it's in diddy's guide.

QUOTE
3. Get 96 sectors of the drive starting at sector 0(MBR), and save to file
MYMBR96.TMP.

Unfortunately hd hacker can only read 16 sectors starting from sector 0. Any other tool to do this?

QUOTE
4. Run bootlace.com:
bootlace.com MYMBR96.TMP

Not sure what this does with the 96 sectors. Probable it converts the single MBR into a triple MBR. But from one to three. Seams "only" double MBR, where comes the third one?

QUOTE
5. Put MYMBR96.TMP back onto the drive starting at MBR(sector 0).

It's clear after I got the tool for 3.
  Forum: Grub4dos · Post Preview: #63124 · Replies: 12 · Views: 3,495

bootsector only booting
mr_
Posted on: Mar 24 2009, 10:37 AM


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QUOTE (jaclaz @ Mar 24 2009, 08:43 AM) *
In any case test the result with "normal" booting of the image in Qemu, and once succeede, introduce PLoP "variation".

Sounds reasonable.

QUOTE (jaclaz @ Mar 24 2009, 08:43 AM) *
Other method is using filedisk or VDK/fsz, details are in this thread:
http://www.911cd.net/forums//index.php?sho...c=19333&hl=

I do not see the relation to VBR only booting, in the end he says
QUOTE
Format your USB (flash) drive with a utility (e.g. with standard XP format, HP utility, pe2usb, ...)
(we need a drive with standard MBR calling NTLDR)

which is again about normal MBR booting.

Also for what I should need filedisk when I want to make a physical drive bootable? His format command is also not special
QUOTE
format R: /FS:NTFS /C /V:RAMPE
/C is for compression what I do not need and /V for description, FS:NTFS is set automatically when formatting with default gui.

The thread is basically about creating a bootable CD containing an pe image (VBR only) with ram booting starting from USB. Not really what I am looking for.

QUOTE (jaclaz @ Mar 24 2009, 08:43 AM) *
The error you are getting now seems like a problem in the bootsector data, typically need a check:

Probable. I do not think I can invert how to fix it with a hex editor.

QUOTE (jaclaz @ Mar 24 2009, 08:43 AM) *
mr_
if it's a USB stick, most probably you could make one the easy way by using makebootfat. (having also the advantage of the double use MBR bootsesctor)

That's an other interesting field for research but I am not sure whenever it solves more problems then it creates as there are not enough reports. In past I hadn't much luck with triple MBR booting.

For this reason I would be glad in a "more native" VBR only booting creation method.
  Forum: Boot from USB / Boot anywhere · Post Preview: #63121 · Replies: 16 · Views: 3,423

bootsector only booting
mr_
Posted on: Mar 23 2009, 02:02 PM


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What I want to reach:
having a drive with Volume Boot Record only booting method, without MBR.

What I've tested already:
Method a)
1) wiped first sector with HxD Hex Editor
2) save removed pendrive and pluged it into a machine without filter driver
3) fast formatted the drive with FAT (windows recognized the full 1 GB size of the pendrive)
4) did copy NTLDR, NTDETECT.COM and BOOT.INI to it
5) booted it with PLoP

Method b)
1) wiped first sector with HxD Hex Editor
2) created a floppy disk with XP create MS-DOS startup disk
3) extracted first logical sector on A:\ with hd hacker
4) did load the file into hd hacker and wrote it into the physical pendrive number
5) save removed the pendrive and plug it in again (windows reconized 1.44 MB)
5) booted it with PLoP

Method c)
Used MKBT but I think it does basically the same as method b).

Question:
In any case the stick boots, this is the good news that inital booting is working. But I get "Invalid system disk, Replace the disk, and then press any key" which is a message from the bootcode. How can I manage it to turn this error message into a bootable DOS or grub4dos?
  Forum: Boot from USB / Boot anywhere · Post Preview: #63070 · Replies: 16 · Views: 3,423

Pinned: Grub4dos Guide/Tutorial
mr_
Posted on: Mar 21 2009, 06:54 PM


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In appendix commands I am missing:
- bootlace.com
- grubinst.exe
- grbins16.exe
- hmload.com

What are the commands install and setup currently doing? Installing the grub legacy way?
  Forum: Grub4dos · Post Preview: #62974 · Replies: 77 · Views: 61,276

mr_
Posted on: Mar 21 2009, 04:08 PM


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Ok, with help to Eric Auer there are now some new informations why the HP MBR could be better in some cases.

The normal/standard XP MBR does "if X then LBA otherwise CHS".

HP jumps over a portion of code by changeing the code to "if X then LBA otherwise LBA". This means the HP MBR never uses CHS.

But why it will never use CHS? It's an USB Format Utility from HP. If booting from USB is possible with the BIOS then also LBA must be supported as CHS is very old, LBA old and USB booting quite "new". Any USB booting BIOS should have a working and well tested LBA implementation, the CHS implementation may be treated a bit more misfit.

As a logical conclusion this also answers to the question if grub4dos has this feature added or not. I assume grub4dos creates a "multi purpose" MBR including at minimum a CHS fallback implementation in order to gain compatibility.

Whenever it would make point for grub4dos to provide also an LBA-only MBR depends on how stable/good/better them have implemented the "use CHS or LBA?" check..

I see now bootlace has a --lba and --chs switch and grub4dos readme contains many hits about lba and chs. Perhaps it's already implemented by using the correct switches?

List for bootlace command line switches will be shown in console and documentation is in grub4dos's readme. But where is a list of command line switches / manual for grubinst or grbins16?
  Forum: Grub4dos · Post Preview: #62969 · Replies: 6 · Views: 1,096

using SIBLO \ SYSLINUX and GRUB4DOS on 1 usb!
mr_
Posted on: Mar 21 2009, 12:42 PM


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QUOTE (maanu @ Mar 20 2009, 08:26 PM) *
* Sadly my mobo does not have usb boot feature . so the only option i have is to make a multiboot isolinux cd where i just forward him further files and syslinux.cfg etc

I think in your case there is a workarround, see http://grub4dos.sourceforge.net/wiki/index...LoP_Bootmanager.

Alternative you can also plug the USB disk into a virtual machine as raw disk, the real mode part will behave similar there only the USB protected mode stuff might differ from real USB booting.
  Forum: Grub4dos · Post Preview: #62953 · Replies: 24 · Views: 5,241

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