Re: 16-bit bootloader support?

[James Courtier-Dutton]

2009/10/7 Gabe Black <address@hidden>:
>
> So I have a real-time OS named Pharlap that has a 16-bit bootloader that
> ends up switching to 32-bit protected mode and loads the OS.  I think it
> relies on the first sector of the partition being loaded and execution
> simply started - but in real-mode.
>
> Is there any way to have grub do this (legacy or grub2)?  I tried
> chainloading, but I think that may be loading it in 32-bit mode.  Any
> pointers on what code I would have to modify to create that option for grub?
>
> Any help is appreciated.
>

I don't think grub can work on any CPU below a 80386.
It probably will no work on 8086, 80186 and 80286.