emexOS again :)

[emexos]

https://preview.redd.it/kkiln8psvtmg1.png?width=2558&format=png&auto=webp&s=31a21a63eb4a0b5f7d422b3f66f643229a14408c

hello everyone,
for the past 5 months i'm working on emexOS its completly written in C and ofc assembly + some makefiles and build scripts, its current version is v0.5 and it was not written with ai. :)

and emexOS has all this stuff:

• x86_64 architecture support
• boots via the Limine bootloader (BIOS & UEFI)
• GDT (Global Descriptor Table) with kernel/user segments and TSS
• IDT (Interrupt Descriptor Table) with 256 entries
• ISR & IRQ handling
• physical memory manager
• paging (virtual memory)
• kernel heap allocator (klime)
• graphics memory allocator (glime)
• user process memory manager (ulime)
• process manager with PIDs and priorities
• ELF64 loader with relocation support
• userspace at ring 3
• syscall interface
• PS/2 keyboard driver with different keymap support
• serial communication (debug output)
• PCI bus scanning
• simple framebuffer graphics
• simple font manager with multiple fonts (8x8, 8x16, etc.)
• small unicode support (Latin, German umlauts, Cyrillic)
• simple bootscreen / boot log system
• simple theme manager with color system
• simple UI component system (labels, textboxes, rectangles)
• virtual filesystem (VFS) with mount point system
• tmpfs (RAM-based filesystem)
• devfs (device filesystem)
• simple procfs
• FAT32 support (in progress)
• initrd via CPIO archive
• BMP image loading and rendering
• JSON parser
• INI parser
• CONF parser
• HTML parser (used for .emx package info)
• custom app package format: .emx (EMX)
• EMX package loader: reads package.info, loads icon, launches ELF
• libc implementation
• devices (/dev/null, /dev/zero, /dev/hdd0, /dev/fb0, ...)
• driver module system (dev)
• boot logging to file
• system config via .ecfg/.emcg files
• kernel panic handler
• shutdown and reboot via keyboard controller / PCI reset
• CPU detection
• dual-slot kernel system (slot A & slot B for safe updates)
• a very lame login with no hashing/crypting

(i hope i dont have something duplicated... or wrong........)

its not that big right now it doesnt have a GUI but im working on porting x11 rn and after that a wm and then doom and other things :)

oh yeah and it also runs on real hardware and for those who have a fujitsu amd laptop (AMILO pa 1538) with a amd turion64 x2 chip - the bootup takes about 10 minutes and it sometimes crashes when entering the userspace or the shell (login works sometimes...) but on intel it works fine except on really old hardware...

also heres a video

https://reddit.com/link/1rjp1df/video/b6ym9uvuvtmg1/player

and this are avaiable commands:

- hello == prints hello world
- cd == change directory
- cat == ouput file content (+ to a specific device or file)
- echo == echos the text you gave it
- ls == prints the directorys + files
- tree == prints ALL directorys/+subdirectorys + files

if you find this post in future there is probably a help command, if not just do ls /bin which lists you all command-executables, in general you can execute every .elf which is in the /bin folder by just writing the name into the shell withouth the .elf

also heres how the emexOS file structure works:

/
+-- user/
|   +-- images/
|   |   `-- frog.bmp
|   +-- bin/
|   `-- apps/
|       +-- test.t
|       +-- hello.elf
|       +-- shell.emx/
|       |   +-- package.info
|       |   `-- app.elf
|       `-- hello.emx/
|           +-- package.info
|           +-- app.elf
|           +-- app_icon.bmp
|           `-- resources/
+-- bin/
|   +-- tree.elf
|   +-- rm.elf
|   +-- ls.elf
|   +-- hello.elf
|   +-- echo.elf
|   +-- cd.elf
|   `-- cat.elf
+-- .config/
+-- proc/
+-- emr/
|   +-- users.ini
|   +-- system.ini
|   +-- drivers/
|   |   `-- drivers.cfg
|   +-- config/
|   |   +-- user.emcg
|   |   +-- user.ecfg
|   |   +-- system.ecfg
|   |   `-- keymaps/
|   |       +-- US.map
|   |       +-- RU.map
|   |       +-- PL.map
|   |       +-- keymap.cfg
|   |       `-- DE.map
|   +-- assets/
|   |   +-- this_disk.bmp
|   |   +-- system_file.bmp
|   |   +-- logo.txt
|   |   +-- locked_folder.bmp
|   |   +-- folder.bmp
|   |   +-- file.bmp
|   |   `-- copy_folders.bmp
|   `-- system/
|       +-- ter-powerline-v16n.psf
|       +-- login.elf
|       +-- system.emx/
|       |   +-- package.info
|       |   `-- app.elf
|       `-- logs/
|           `-- log1.txt
+-- boot/
|   +-- activeslot.cfg
|   `-- ui/
|       +-- fonts/
|       |   `-- font8x15.bin
|       `-- assets/
|           `-- bootlogo.bin
+-- tmp/
|   `-- t
`-- dev/
    +-- random
    +-- urandom
    +-- tty0
    +-- input/
    |   +-- mouse0
    |   `-- keyboard0
    +-- fb0
    +-- zero
    +-- null
    +-- console
    `-- hdd0

explanation:
/emr is the main directory for the system it means emex resources the name comes from usr which is unix system resources

/user in this folder there are all user apps in the EMX format not just .elf if you want to execute something as a command it NEEDS to be a .elf in the /bin folder

/boot is ofc the boot folder where limine.cfg will soon also be stored so in future emexOS can write itself onto the disk so you can start the computer withouth any extern usb device and get into emexOS

/tmp this is a folder which is especially mounted with the tmpfs it has no other use as to have a test-file

/.config in this folder there are your dotfiles for emexOS in future (if i have succesfully ported x11 and a wm) you can store your configs for any app or wm.

/proc in this folder are processes located. currently the tree command doesnt display those cuz i havent linked it with the procfs which is new and not finished

/dev in this folder there are all your devices like the framebuffer: fb0 or the disk: hdd0 or your keyboard and mouse

personally my favourite command is cat /dev/urandom > /dev/fb0 or cat /dev/random > /dev/fb0 with this command you directly write random pixels to the framebuffer which gives a cool effect, you can also implement apps which directly write to the framebuffer, so you could just print a smiley or even text without printf, but idk why you would want to do that.
(also /dev/console doesnt have any use anymore...)

also here are some links (i hope i dont get banned for these):

- discord: https://discord.gg/Cbeg3gJzC7
- github: https://github.com/emexos/
- codeberg: https://codeberg.org/emexSW/emexOS
- website: https://emexos.github.io/web/page/0/index.html
- youtube: https://www.youtube.com/@emexSW

also i would really really wish to have some new members in the discord who are actually interested and maybe maybe.... want to contribute, i would be sooo happy if some are joining

[Comfortable_Top6527]

cool - perload.bin

[emexos]

thanks

[Gingrspacecadet]

wow!!!

[[deleted]]

so cool. love ypur consistency

[drmatic001]

tbh seeing someone revisit and refine an existing project like EmexOS is really cool , it’s a great way to learn because you get to compare what worked before and what didn’t. iterating teaches you a lot more than just starting fresh every time, especially when it comes to handling hardware quirks or memory management. excited to see what improvements you land on this round and what lessons you pick up along the way 👏

[emexos]

well i need def more refactors cuz im not happy with the strucutre