China DOS Union

I haven't seen a U disk in FDD format. You change the virtual path in config.sys to the full path.
DEVICE=A:\HIMEM.SYS /TESTMEM:OFF /Q
DEVICE=A:\UMBPCI.SYS
DEVICE=A:\USBASPI.SYS /R /V /NORST
DEVICE=A:\DI1000DD.SYS
SHELL=A:\COMMAND.COM /E:1024 /P /F
DOS=HIGH,UMB,AUTO
FCBSHIGH=4,0
FILESHIGH=30
BUFFERSHIGH=20,0
STACKSHIGH=9,256
LASTDRIVEHIGH=Z

If not, change to C:

It should be handled with the memdrive function of GRUB4DOS:
Boot to DOS, start GRUB4DOS, map the FDD image to memory, and boot the DOS inside it

Because the USB driver under DOS will damage the BIOS-built-in USB driver

to fastslz

My device is a mobile PC, and the mainboard only supports USB FDD. So my flash drive must be made to support FDD. I just tried the ones where you changed it to A: and changed it to C:, both didn't work. Is there a problem with the DI1000DD.SYS file?

The DI1000DD.SYS file is okay. Maybe as the 17th floor said, because the USB driver under DOS will damage the BIOS - built - in USB driver. Try removing
DEVICE=A:\USBASPI.SYS /R /V /NORST
DEVICE=A:\DI1000DD.SYS

to fastslz

Removed
DEVICE=A:\USBASPI.SYS /R /V /NORST
DEVICE=A:\DI1000DD.SYS

No errors on startup. But how can I make my external hard drive detectable in DOS then??

[ Last edited by rubasse2000 on 2006-7-7 at 11:51 ]

to darkradx

How to operate specifically using the memdrive function of GRUB4DOS?

Enter GRUB4DOS, execute commands like:

map --mem /usbdrive.img (fd0)
map --hook
chainloader (fd0)+1
rootnoverify (fd0)
boot

For details, refer to GRUB4DOS's readme and sample.

Using GRUB4DOS is a bit difficult for the original poster, and you also need to write the MBR to the USB drive. But it's also an opportunity to learn by doing

The owner of the thread, have you seen what I said on the 9th floor? The USB-FDD mode boot must be supported by a special USB flash drive, that is, the USB flash drive needs to have a 1.44MB part to simulate a floppy drive to be able to boot. Ordinary USB flash drives cannot be booted in the USB-FDD mode.

In addition, the USB-FDD mode also supports booting from an external USB floppy drive.

iformat cannot format USB flash drives under XP!

My notebook is ultra-thin, and the hard drive inside is a dedicated small hard drive, different from the 3.5-inch hard drives on the market. So I can only install the system after booting with an external floppy drive. But after I boot with the floppy drive, how can I recognize the external hard drive? The external hard drive is converted from an ordinary notebook hard drive using a USB adapter. I used the Super DOS boot disk, but it still can't be recognized.

DEVICE=USBASPI.SYS /R /V /NORST
DEVICE=DI1000DD.SYS
What would happen to see!

I followed the above steps, but my mistake is like this:
disk I/O error
Replace the disk, and then press any key
Please help to see what the reason is

Hang your hard drive on someone else's machine, make the C drive a DOS boot, then put the I386 directory of XP on the hard drive. Enter the I386 directory under DOS and execute winnt to install XP. By the way, put the drivers into the hard drive as well

kk...........Learning...................