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I made my own DOS implementation (Announce)

posted by Zyzzle, 08.12.2023, 15:56

> > Perhaps 4kn support,
> What is that?
 Sorry, it is 4k-native sector support. As in, most hard drives are now made with 4096-byte sectors, as opposed to the old standard of 512 bytes/sector.

>
> > GPT and /
> The kernel itself does not support any partitioning tables at all. It has
> syscalls that are used to mount the filesystems from specific offsets on
> the disk. An external program is used to tell the kernel the correct
> beginning sector of every filesystem. Currently the mounter supports only
> MS-DOS-compatible partitioning. I have designed my own partitioning scheme
> that supports unlimited number of partitions, but haven't implemented it
> yet.
 Thanks for the explanation and, as your kernel seems to be using RAW sector-offsets, sector size shouldn't matter as to whether it's 512-byte native, 512-byte "emulated", or 4k-byte native.

> I don't understand the question. BIOS int13h extensions use 64-bit indexing
> for sectors. There is no 2 TB limitation.
 Never mind, of course there is not 2 TB limit when using UEFI int 13 extensions. I was confusing the old DOS/BIOS 2TB limit and direct 64-bit index calls to int 13h.

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