By Paul Driver
(This used to live in the Chaintech Subforum, but I was updating it, and thought it would be happier here)
This is my attempt to help people make a USB Memory Device DOS bootable, using freely available utilities.
I hit the 10000 character post limit (I didn't know it existed) so I had to split this post, the MakeBootFat method is in the 2nd part.
HOWTO: I have no floppy drive, how do I boot DOS from a USB Memory device!!
This is my attempt to help people make a USB Memory Device DOS bootable, using freely available utilities.
First, you need to set your system's BIOS so that you can boot from the device in question. In order for this to happen the USB Memory Device must be in the boot order list before the harddisk if you expect to boot from it.
On later(newer) BIOSes you may have an option to press the ESC key before booting, and selecting the device to boot from. The USB Memory Device will appear in this list after it has had a boot sector written to it.
Next, you will need software that will write a boot block to the USB Memory Device. On some machines, this can be done with standard partitioning tools (fdisk or others). I have yet to own a machine that could do this, and I have not personally met anyone who has, but the Internet is full of anecdotal reports of this working.
I have found two successful methods of writing a Boot Block to a USB Memory Device, they are the HP Disk Storage Format Tool, and the MakeBootFat command line utility. The MakeBootFat command line utility is documented in a second post, following this one.
Method 1: Using the HP Disk Storage Format Tool
The simplest method of all is to get a copy of the Compaq/HP USB Disk Storage Format Tool, contained in SP27213.exe . The HP website lists this service pack, but I've never been able to download it from their FTP server. A quick
google search will probably locate a source for you, but if you have problems, I last located SP27213.exe from
THIS URL ( Alternative URL #1 with DOS System Files, Alt. URL #2 with DOS ).
After unpacking, installing, and executing this tool, it will write a hard disk style boot block (MBR) to your USB Memory Device, and the USB Memory Device will appear as a harddrive when booted.
The HP utility does need a source for the PC/MS/DR/Open DOS boot files (dos.sys/msdos.sys io.sys and command.com) there are many sources for these files, you may have a win9x/me boot CD, cab files or other sources available to you.
If no pc/ms/dr/opendos files are available to you, try BOOTDISK.COM for a
Windows 98se boot disk (Try this link if you have trouble with the first) , and the
Virtual Floppy Disk Utility to mount image files as a drive, and allow read/write access to the contents.
The end result of running the HP Utility is that your USB Memory Device will be formatted (so back up your data), it will have a harddrive style MBR written to it. It will also have the three necessary boot files copied to it. This USB Memory Device will now boot as a harddrive, appear as a USB hardrive, and, when booted from, will appear as drive C:.
If this is unacceptable to you, or not compatible with your BIOS, then you will need to use the
Makebootfat utility documented in the second post.
Step by Step instructions for the HP Disk Storage Format Tool.
Step 1: Download the necessary utilities/files
http://www.docjelly.com/Blog/content/binary/SP27213.exe or
Alt#1 /
Alt#2
http://chitchat.at.infoseek.co.jp/vm...d21-050404.zip if you need to use a floppydisk image file
http://www.dehning.com/download/util...sks/boot98.exe or
http://www.msu-hb.de/download/boot98se.exe if you do not have access to the MS-DOS system files.
Step 2: Extract and install the necessary utilities/files
Install the SP27213.exe file somewhere ( say c:\utility\drivekey\ )
If you need to use a floppydisk image file to access the DOS system files, extract the vfd21-050404.zip somewhere ( say c:\utility\VFD\ ).
If you are using the floppydisk image file, extract the boot98.exe file using a WinRar or maybe another zip utility. This archive will give you an error when extracted with winrar, but the image file inside (winb98.ima) will extract. If extracting this fails, use the boot98sc.zip file (It's not a standard win98se boot disk image). Either way, put the resulting winb98.ima or win98se.img file somewhere ( say c:\utility\VFD\ ), this step is needed only if you have no other source for the DOS system files.
Step 3: Prepare and Format the USB-MD.
Insert the USB Memory Device into a USB socket (if not already installed), do not use a HUB.
3a: Run the VFD Control Panel (c:\utility\VFD\vfdwin.exe), if you have a source for the DOS system files other then an image file you can skip this and proceed to Step
3b.
The VFD Control Panel will start on the
device driver tab, press the
[install] and
[start] buttons. Switch to the
drive 0 tab, and press the
[drive letter] button, and select something other then A or B as a mount point. On my system, drive K is the next available drive
(Neither Drive A nor B works with the HP Utility on my system).
Now, you will press the
[open] button, and point the VFD Control Panel to either the WINB98.IMA or the WIN98SEC.IMG image file and click the new
[open] button.
You now have the MSDOS boot/system files available on a new drive.
Now that the prep-work is done, you can actually
do something to your USB Memory Device.
3b: Start the HP USB Disk Storage Format Tool (from the start menu).
Your USB Memory Device should be visible on the top most drop down menu (if not, look for it, if it still does not show up, your USB Device may be incompatible with booting or this utility).
Select FAT or FAT32 as your file system, Fat32 may be preferable for large memory devices, FAT may be preferred if you are going for maximum compatibility (example: you want to use the device with Printers, Cameras, etc).
Optionally, you may give your USB-MD a Volume Label.
Click the
''Quick Format'' check box.
Click the
''Create DOS Startup Disk'' check box.
Select the
''Using DOS System Files Located at:'' radio button.
Point the HP Utility to the source of your DOS system files (the directory, floppy, or virtual floppy drive) using the
[...] button below the
''Using DOS System Files Located at:'' radio button.
Click the
[Start] button.
You should recive a confirmation message that your USB Memory Device was formatted, open it and verify that command.com, (MS)dos.sys and io.sys are present.
Close the HP USB Disk Storage Format Tool.
If you followed step
3aGo to the VFD Control Panel and on the
drive 0 tab, press the
[close] button, next go the the
driver tab and press the
[stop] and
[uninstall] button, and exit the VFD Control Panel.
You are done partitioning and formatting your USB Memory Device. Transfer what ever additional data you need to the device (Award Flash and a BIOS Image for example), edit the config.sys and autoexec.bat is necessary and reboot your machine.
Your computer
SHOULD now boot from the USB Memory Device.
Paul Driver
Warning: never attempt to write a LONG post directly into the forum editor, and NEVER try it with a sticky CTRL Key 
Processors
Motherboards
Chipsets
Memory
Graphics Cards
Storage
Cases and Cooling
Mobile
Systems
Displays
Shows and Expos
Linear Mode
