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WDe and GPT, booting DOS (Users)

posted by Richard, 22.11.2022, 12:29

Thanks for your reply.



> Honestly, I'm not totally sure if you know what you're doing -

I agree with that statement - I also do not know what I am doing in Windows 10 - programs that I compiled for use in Windows 10 two years ago now do not work properly (after an update) - no documentation seems to be available from M$ explaining the situation. As time passes by, I know even less of what Windows is doing.

OK, so I missed reading the "Physical" accessing (normally for me until fairly recently I was working from a single USB stick for DOS (bare metal) - so I only was used to the Logical drives.





> precondition for using the DOS71BSG thing. Another precondition is that
> you're quite familiar using a disk editor, preferably WDe -


I used WDE 1.00 (though not quite familiar with it) to obtain the info required for the DOS71BSG thing, saving to a file. Once the DOS71BSG.bin was modified, that modified file was WDE F2 (Restore from File) into the original Logical Drive.

>
> > /dev/sda2 is actually the original MBR version of MSDOS71
> > /dev/sda3 is actually the Japheth GPT modifications of MSDOS71
>
> I wonder how did you get the "modification" to /dev/sda3 without knowing
> how WDe can write to a physical disk?

I simply used a Windows 10 program to CLONE the modified partition to /dev/sda3
- is CLONING incorrect to use (e.g. because of any absolute addresses)?







>
> > A> type the name of the command interpreter (e.g.
> C:\Windows\command.com)
>
> If such a message appears, it most likely means that the bootstrap code has
> successfully read the kernel from a FAT disk and launched it, but after
> that DOS itself is unable to "mount" its C: drive.


Any clues what I can try???

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