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I made my own DOS implementation (Announce)

posted by samwdpckr, 08.12.2023, 02:43

> >
> > Unfortunately it does not support FAT32 :-(
> FAT32 support is critical, should be added.
 The kernel has a filesystem driver API that is currently read-only. A dynamic FAT32 driver would be good for testing the write side of things. Ext4 would also be cool.

The kernel has a static driver for FAT12/16 filesystem, and I tried to write it so that the static driver can easily be replaced with something else.

> Perhaps 4kn support,
 What is that?

> 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.

The bootloader tells the kernel the offset of the system partition.

> or exFAT support as well
 Writing your own drivers is a good way to contribute to the project.

>, for > 2 TiB drives. Does this feature mean
> internal support for your OS goes beyond the LBA48 2 TiB BIOS / LBA
> limitation:
 I don't understand the question. BIOS int13h extensions use 64-bit indexing for sectors. There is no 2 TB limitation.

> Good luck on your project, and thanks for sharing with the community.
 Thanks.

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