http://sininenankka.dy.fi/~sami/fdshell/doskernel.php

lEEt/OS

No bloat!



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| Navigation     | ST-DOS                                                         |
| -------------- |                                                                |
| Index          | The kernel can be compiled and linked using Open Watcom        |
| -------------- | compiler. The kernel does not make other assumptions about the |
| Getting        | bootloader than that in the memory address 0xFC15 there must   |
| started        | be the BIOS drive number of the system drive, and in the       |
| -------------- | memory address 0xFC1C the 32-bit index of the first logical    |
| Features       | sector of the boot partition. The kernel can be loaded to      |
| -------------- | anywhere in the memory (as long as the starting point is the   |
| Download       | beginning of a paragraph) and must be started by doing a far   |
| -------------- | jump to the beginning of the code with offset 0.               |
| System         | ST-DOS-specific features                                       |
| requirements   |                                                                |
| -------------- | Changelog:                                                     |
| Screenshots    | [28. 3. 2024: Replaced MMX routines with code that uses 32-bi] |
| -------------- | [                                                            ] |
| Videos         | [26. 3. 2024: Micro-optimizations. The kernel can now be comp] |
| -------------- | [                                                            ] |
| Documentation  | [23. 3. 2024: The size of the source filesystem is now detect] |
| -------------- | [                                                            ] |
| Philosophy     | [21. 3. 2024: Better support for installing from a USB storag] |
| -------------- | [                                                            ] |
| TCP/IP stack   | [19. 3. 2024: Fixed one memory bug.                          ] |
| -------------- | [                                                            ] |
| Software       |                                                                |
| -------------- | Source for the kernel & userland                               |
| ST-DOS         |                                                                |
| -------------- | Last updated: 29. March 2024                                   |
| Bugs           |                                                                |
| -------------- | Source for the boot loader (can be assembled with NASM)        |
| FAQ            | The bootloader searches for a file named KERNEL.BIN from the   |
| -------------- | root directory of a FAT12/16 filesystem and loads it to        |
| Try it online! | memory.                                                        |
|                |                                                                |
|                | Bootable 1,44 MB floppy image                                  |
|                |                                                                |
|                | Bootable USB storage image                                     |
|                |                                                                |
|                | Bootable "El Torito" CD image                                  |
|                |                                                                |
|                | Bootable 360 kB floppy image for IBM PC and XT                 |
|                |                                                                |
|                | md5sums                                                        |
|                |                                                                |
|                | Features                                                       |
|                |                                                                |
|                |   * Support for large disks and 2 GB FAT filesystems           |
|                |   * Dynamic disk caching                                       |
|                |   * Dynamic file buffering                                     |
|                |   * Mostly MS-DOS-compatible API - most DOS programs should    |
|                |     work                                                       |
|                |   * Can create and mount disk images                           |
|                |   * Calls DOS idle handler (int 28h) also during disk I/O      |
|                |   * Symbolic links                                             |
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(c) Sami Tikkanen 2020 - 2024