What is the difference between .nb1 and .nbf

[david beckham]

after I cooked ROM from Jeff Summer's Kitchen, it has the option to choose whether you want it .nb1 or .nbf

.nb1 is for SD card flashing
while .nbf is for advanced users...

so what is exactly the difference between this 2 extensions??

[spydec]

Keen to always b learning more. Would appreciate a response to add 2 d knowledge for which without this site I would be stuffed wit an XDA still stuck on d update screen

[itsme]

an nbf file contains some information about what kind of device the os image
is intended for, and a bootloader and the os image.

a nb1 file contains only an os image.

nbf's can be flashed with Programme A.

see http://www.xs4all.nl/~itsme/projects/xda/wince-flashfile-formats.html

osimagetool (http://xda-developers.com/XDAtools/) understands both nb1 and nbf files.

[cgigate]

an nbf file contains some information about what kind of device the os image
is intended for, and a bootloader and the os image.

a nb1 file contains only an os image.

nbf's can be flashed with Programme A.

see http://www.xs4all.nl/~itsme/projects/xda/wince-flashfile-formats.html

osimagetool (http://xda-developers.com/XDAtools/) understands both nb1 and nbf files.
Do you mean if I flash the phone with .nbf via osimagetool ( Programme A) , it could be over-write bootloader ?

[itsme]

yes, it could. but osimagetool will not take the bootloader from the nbf,
it always puts the 5.15 bootloader in the file that is flashed with "Programme A"

for a reason I don't yet understand, the bootloader is not always updated.
I am quite sure that "programme a" used to update bootloaders, but I have not seen it do this for some time. - maybe it has to do with the rom version?