forked from PoliEcho-holding-org/kern
46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
# kern.
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Kern is a 32-bit x86 based operating system.
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What does that mean?
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Well, 32-bit means that it can access $2^32$ different memory addresses.
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x86 is the processor architecture it is built upon.
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## Command Line
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Kern uses a command line (for now), so you'll have to type commands to do stuff.
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It is currently quite simple. It supports these commands:
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- clear: Clears the screen
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- echo <msg>: Prints msg to the screen
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- exit: Shuts down the OS ***(QEMU only!)***
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- help: Prints all available commands
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- ls: Prints all files
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- reboot: Reboots the system
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You can also print/run files by typing their filename (More in **Filesystem**)
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## Filesystem
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Kern has a custom filesystem. This filesystem works as a simple filetable.
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It doesn't support directories at the moment.
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Here's a list of supported filetypes:
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| Type | Description | CLI Behaivour |
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| ---- | ----------- | ------------- |
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| .bin | Executable binary | Executes file |
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| .txt | Raw ASCII text file | Prints out file content |
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| .tab | Filetable format | Prints files in filetable |
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| .dat | Data Binary | Prints HEX content of file |
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| .asm | Assembly source code | Prints out file content |
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### Filetable format
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The filetable format (.tab) is a binary file containing
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| Byte(s) | Content |
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| ------- | -------- |
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| 0-9 | Filename |
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| 10-12 | Filetype |
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| 13 | Number of filetable entries |
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| 14 | Starting sector |
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| 15 | File Length (in sectors) |
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