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WDe and GPT, booting DOS (Users)

posted by Zyzzle, 27.10.2022, 16:08

> > how did you do this?
> >
> > did you re-invent "Hybrid GPT" by writing a MBR into the boot sector?
>
> No. I added some code to the FAT32 bootsector ( sector#2 ) to intercept Int
> 0x13
> and return a fake FAT32 PT entry if sector 0 of HD 0x80 is read.
>
> Also, in config.sys the very first device driver is one that restores the
> old Int 0x13 vector ( by using good old "virus call" int 2Fh, ah=13h :-D ).
Are you willing to do a public release of this "hack"? It would be very useful to many of us who want to boot DOS on GPT partitions. I think limit on such GPT paritions recognized by DOS 7.1 will still be hard-limit of 2048 GiB, correct?

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