Write custom boot loader to .vhd file

I have a custom boot loader that I would like to write to a .VHD file for testing. Any idea at what offset in the file I should write the boot 开发者_运维百科loader to? Any pointers to the C structures for the .VHD file format?

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The specifications for the vhd file format are available here.

You would probably have to read through the specs to find the details to do what you want.