OS Diagram / Tech Tree

[ChocolateLoverRaj]

I think it would be cool to make a OS Diagram / Tech Tree of all the different things that are needed to do certain things. I started making a diagram:

digraph {
    uefi_firmware [label = "UEFI Firmare"]

    bios_firmware [label = "BIOS Firmware"]

    bootloader [label = "Bootloader"]
    uefi_firmware -> bootloader
    bios_firmware -> bootloader

    frame_buffer [label = "Framebuffer"]
    bootloader -> frame_buffer

    serial_port [label = "Serial Port"]
    bootloader -> serial_port

    serial_logger [label = "Serial Logger"]
    serial_port -> serial_logger
    
    screen_logger [label = "Screen Logger"]
    frame_buffer -> screen_logger
    
    logging [label = "Logging"]
    serial_logger -> logging
    screen_logger -> logging

    gdt [label = "Global Descriptor Table"]
    bootloader -> gdt

    idt [label = "Interrupt Descriptor Table"]
    bootloader -> idt
    
    double_fault_handler [label = "Double Fault Handler"]
    gdt -> double_fault_handler
    idt -> double_fault_handler
    
    general_protection_fault_handler [label = "General Protection Fault Handler"]
    idt -> general_protection_fault_handler
    
    page_fault_handler [label = "Page Fault Handler"]
    idt -> page_fault_handler
    
    interrupt_handlers [label = "Interrupt Handlers"]
    idt -> interrupt_handlers
    
    pic8259 [label = "8259 PIC"]
    bootloader -> pic8259
    
    enable_pic8259 [label = "Enable 8259 PIC"]
    pic8259 -> enable_pic8259
    
    pic8259_timer_interrupt [label = "8259 PIC Timer Interrupt"] 
    enable_pic8259 -> pic8259_timer_interrupt
    interrupt_handlers -> pic8259_timer_interrupt
    
    pic8259_keyboard_interrupt [label = "8259 PIC Keyboard Interrupt"]
    enable_pic8259 -> pic8259_keyboard_interrupt
    interrupt_handlers -> pic8259_keyboard_interrupt
    
    ps2_mouse [label = "Parse PS/2 Mouse Input"]
    serial_port -> ps2_mouse
    
    pic8259_ps2_mouse_interrupt [label = "8259 PIC PS/2 Mouse"]
    enable_pic8259 -> pic8259_ps2_mouse_interrupt
    interrupt_handlers -> pic8259_ps2_mouse_interrupt
    
    read_page_tables [label = "Read Page Tables"]
    bootloader -> read_page_tables
    
    memory_map [label = "Know Memory Map"]
    bootloader -> memory_map
    
    frame_allocator [label = "Frame Allocator"]
    memory_map -> frame_allocator

    read_used_virt_mem [label = "Read Used Virtual Memory"]
    read_page_tables -> read_used_virt_mem
    
    heap_allocator [label = "Heap Allocator"]
    frame_allocator -> heap_allocator
    read_used_virt_mem -> heap_allocator
    
    alloc [label = "Rust `alloc`"]
    heap_allocator -> alloc
    
    memory_mapper [label = "Memory Mapper"]
    frame_allocator -> memory_mapper
    read_used_virt_mem -> memory_mapper
    
    rsdp_addr [label = "RSDP Address"]
    bootloader -> rsdp_addr
    
    read_acpi_tables [label = "Read ACPI Tables"]
    rsdp_addr -> read_acpi_tables
    memory_mapper -> read_acpi_tables
    
    read_interrupt_model [label = "Get Interrupt Model"]
    read_acpi_tables -> read_interrupt_model
    
    apic [label = "APIC"]
    read_interrupt_model -> apic
    
    disable_pic8259 [label = "Disable 8259 PIC"]
    pic8259 -> disable_pic8259
    
    io_apic [label = "IO APIC"]
    apic -> io_apic
    
    io_apic_legacy [label = "IO APIC Legacy IRQs"]
    io_apic -> io_apic_legacy
    disable_pic8259 -> io_apic_legacy
    
    legacy_keyboard_interrupt [label = "Keyboard Interrupts IO APIC Legacy IRQ"]
    io_apic_legacy -> legacy_keyboard_interrupt
    interrupt_handlers -> legacy_keyboard_interrupt
    
    keyboard_interrupt [label = "Keyboard Interrupts"]
    pic8259_keyboard_interrupt -> keyboard_interrupt
    legacy_keyboard_interrupt -> keyboard_interrupt
    
    mouse_interrupt [label = "PS/2 Mouse Interrupts"]
    pic8259_ps2_mouse_interrupt -> mouse_interrupt
    
    rtc [label = "RTC"]
    bootloader -> rtc
    
    legacy_rtc_interrupt [label = "RTC Interrupts IO APIC Legacy IRQ"]
    rtc -> legacy_rtc_interrupt
    io_apic_legacy -> legacy_rtc_interrupt
    interrupt_handlers -> legacy_rtc_interrupt
    
    local_apic [label = "Local APIC"]
    apic -> local_apic
    
    apic_timer [label = "APIC Timer"]
    local_apic -> apic_timer
    
    apic_timer_interrupt [label = "APIC Timer Interrupts"]
    apic_timer -> apic_timer_interrupt
    disable_pic8259 -> apic_timer_interrupt
    
    draw_to_screen [label = "Draw to screen"]
    frame_buffer -> draw_to_screen
    
    copy_vm_logs [label = "Copy/paste logs from virtual machine"]
    serial_logger -> copy_vm_logs
    
    pc_keyboard [label = "Parse Keyboard Input"]
    serial_port -> pc_keyboard
    
    keyboard_input [label = "Keyboard Input"]
    pc_keyboard -> keyboard_input
    keyboard_interrupt -> keyboard_input
    
    mouse_input [label = "Mouse Input"]
    ps2_mouse -> mouse_input
    mouse_interrupt -> mouse_input
    
    future_executor [label = "Future Executor"]
    alloc -> future_executor
    interrupt_handlers -> future_executor
    
    async_await [label = "Async/Await"]
    future_executor -> async_await
    
    cooperative_multitasking [label = "Cooperative Multitasking"]
    async_await -> cooperative_multitasking
}

Link to view

So far I've only added things that I used myself, so no PCI, USB, File System, Network yet.

Let me know if

• You have suggestions on a different format besides Graphviz for the diagram
• I have mistakes in the diagram
• More things to add to the diagram
• If you want to create a GitHub repository for collaborating the diagram