China DOS Union

Just like in the XP system's "boot.ini" file, adding "C:\GRLDR=\"Start GRUB\"" to simply load the GRUB boot item, how to achieve this in the WIN7 system? Please give guidance from the experts, thanks!

bcdedit /create /d "GRUB" /application bootsector
At this time, a {id} is generated
bcdedit /set {id} device partition=C:
bcdedit /set {id} path \gdldr.mbr
bcdedit /displayorder {id} /addlast

The root directory of drive C needs to have gdldr.mbr and grldr

Originally posted by fengxi at 2010-11-17 23:26:
bcdedit /create /d "GRUB" /application bootsector
At this time, a {id} is generated
bcdedit /set {id} device partition=C:
bcdedit /set {id} path \gdldr.mbr
bcdedit /displayorder {id} /addlast

...

Thank you for the advice. This method can be completed without relying on third-party tools.

Just now I tested it myself. It turns out that in the installed WIN7 system, there is also a BCD file under the system disk C:\boot, but the file size is different from that in the ISO. Then copy BcdTool (or easybcd) to the BOOT file, and you can also modify this BCD file. So I set up the real-mode boot of GRUB, then copied grldr.mbr, grldr, menu.lst and the self-made DOS image file to the C:\ root directory. Restarted WIN7, the optional menu appeared, and the application was successful!

[ Last edited by martin325 on 2010-11-18 at 00:17 ]

Need the two files grldr.mbr /grldr, and edit the following content into a cmd script and run it.

@ECHO OFF
for /f "tokens=2" %%c in ('BCDEDIT /CREATE /D "BOOT FROM GRUB" /application bootsector ') do set id=%%c
bcdedit /set %id% device partition=c:
bcdedit /set %id% path \grldr.mbr
bcdedit /displayorder %id% /addlast
COPY GRLDR C:\ /Y >NUL
COPY GRLDR.MBR C:\ /Y >NUL
PAUSE

Ask a master, how to make a boot?