52 lines
2.6 KiB
Markdown
52 lines
2.6 KiB
Markdown
# Writing an Operating system
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## As a learning experience... Inspired by people like.. Linus Torvalds and Andreas Kling
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### The goal
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Writing a hobby operating system to better understand the basic building blocks of any operating system.
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### Operating System Technical specs/details
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Currently the operating system is in the planning fase.
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I hope to soon have the basic output and booting sequence with multiboot done.
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### Planning
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[x] Muliboot to kernel \
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[ ] Printing strings and integer numbers (both decimal and hex) on the screen is certainly a must. This is one of most basic ways of debugging, and virtually all of us have gone through a kprint() or kout in version 0.01. \
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[ ] Outputting to a serial port will save you a lot of debugging time. You don't have to fear losing information due to scrolling. You will be able to test your OS from a console, filter interesting debug messages, and automatize some tests. \
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[ ] Having a working and reliable interrupt/exception handling system that can dump the contents of the registers (and perhaps the address of the fault) will be very useful. \
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[ ] Plan your memory map (virtual, and physical) : decide where you want the data to be. \
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[ ] The heap: allocating memory at runtime (malloc and free) is almost impossible to go without. It should be implemented as soon as possible.
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### Other features I am thinking of:
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[ ] USTAR Filesystem ( For its simplicity this is very likely the first filesystem the OS is going to support) \
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[ ] Memory Management \
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[ ] Scheduling (Unknown what the scheduling algorithm will be, as with everything suspect simplicity) \
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[ ] RPC - for interprocess communication \
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[ ] Sync primitives - Semaphores, Mutexes, spinlocks et al. \
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[ ] ACPI support ( Or some other basic way to support shutdown, reboot and possibly hibernation ) \
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[ ] ATA support \
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[ ] Keyboard support ( must have ) \
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[ ] Basic hardware recognition ( CPU codename, memory, ATA harddisk, RAW diskSpace, CPU speed et al. ) \
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[ ] Basic Terminal \
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[ ] Simplistic draw ( maybe ?!?) \
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### Far in the future: \
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[ ] Basic Window server/client
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#### Support for more filesystems if I like the challenge in writing these ...
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[ ] FAT Filesystem
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[ ] EXT2 Filesystem
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### Resources:
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[wiki.osdev.org/Main_Page](wiki.osdev.org/Main_Page)
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[Modern Operating Systems [book]](https://www.amazon.com/Modern-Operating-Systems-Tanenbaum-Andrew/dp/1292061421/ref=sr_1_1?__mk_nl_NL=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=Modern+Operating+systems&qid=1619967779&sr=8-1)
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[whiteheadsoftware.dev](https://whiteheadsoftware.dev/operating-systems-development-for-dummies/) |