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Introduction Basic Information Introduction Required Knowledge GCC Cross-Compiler Beginner Mistakes Licensing Getting Started How To Ask Questions What order should I make things in? Frequently Asked Questions Tutorials more... Environment How kernel, compiler, and C library work together Interrupt Service Routines Using other Languages than C The BIOS (PC) Inline Assembly (including examples) Object Files and relocation Bare Bones / Baby Steps Bare Bones Ada Bare bones C++ Bare Bones D Bare Bones Pascal Bare Bones FreeBasic Bare Bones The BabyStep Tutorial more... Booting and Setup Boot Sequence Diskless Booting GDT Tutorial Interrupts Getting Keyboard Input Testing and Debugging Troubleshooting Testing Unit Testing How Do I Use A Debugger With My OS more... Development Code Management Compiler Development What's a compiler? Making a Compiler (Theory) Design Considerations Kernel Models Monolithic Kernel Microkernel Exokernel and related models Modular Kernel more... Task Models Monotasking Systems Multitasking Systems Real-Time Systems more... Memory and Resource Management Memory management - Overview and Introduction Segmentation Paging Memory Allocation Page Frame Allocation Memory Management Unit, or in-depth description of recursive mappings File Management File Systems more... System Calls ARM System Calls Scheduling Processes and Threads Context Switching Scheduling Algorithms Multiprocessor Scheduling Blocking Process - processes sleeping and waiting more... Process Sychronization Synchronization Primitives - Semaphores, mutexes, spinlocks et al. Signals more... Inter-Process Communication Message Passing Shared Memory RPC - Remote procedure calls more... Resources Books on OS Development Assembly Disk Images with preinstalled GRUB Deprecated, yet relevant, bits of specifications Chip Numbers, Acronyms and Things Resources more... Reference Information Executable File Types 64 bit ELF COFF XCOFF64 32 bit ELF PE COFF XCOFF32 16 bit COM MZ NE more... Filesystems FAT Details Ext2 Details SFS Details NTFS Details more...

Hardware The Hardware Category and linked resources CPU X86 Modes Real Mode Protected Mode Virtual 8086 Mode X86-64 Other IA32 Architecture Family Model Specific Registers (MSRs) Detecting CPU Speed Inline Assembly/Examples CPU Bugs SSE Where Can I Find Information About Ports CPU Registers x86 more... ARM ARM Overview ARM RaspberryPi Tutorial C Memory Detecting Memory (x86) A20 Line or "Why can't I access all my memory?" IRQ's and Exceptions, PIC, NMI, APIC, OPIC PS2 Keyboard Input Mouse Input I can't get interrupts working IDT problems Interrupt Service Routines (ISRs) Interrupts Non Maskable Interrupt (NMI) APIC PIC more... Clocks, Timers and Counters HPET APIC timer (per-processor timer) Programmable Interval Timer (PIT) The CMOS clock, and its RTC chip Detecting CPU Speed Video Accelerated Graphic Cards Detecting Colour and Monochrome Monitors? Printing to Screen in protected mode Text Mode Cursor Drawing In Protected Mode Kernel Stdio Theory VGA Resources and VGA Hardware documentation Drawing characters in graphics mode using VGA Fonts Video Signals And Timing How to program Bochs' and QEMU's BGA graphics device more... Audio Sound PC Speaker Sound Blaster 16 more... Storage devices ATA (harddisks) ATAPI (CD-ROM) AHCI (SATA native) DMA Floppy Disk Controller (FDC) more... Plug and Play Plug-and-Play (PNP) PNP Calls In Protected Mode PCI, USB and things like this ... AGP USB PCI Serial ports (primarily RS-232) more... UEFI UEFI Systems with broken UEFI implementations ACPI ACPI RSDP AML more... Network cards and communicating devices Ethernet and other wired networking: 3c90x Intel 8254x Ne2000 RTL8139 RTL8169 Intel Ethernet i217 Wireless Networking: 802.11 (WiFi standard) more... Non-x86 Development PowerPC MIPS Sparc ARM more... Tools Bootloaders Bootloader theory GRUB / GRUB 2 LILO XOSL System Commander Boot Magic Rolling Your Own Bootloader more... Compilers GCC Cygwin MinGW Dev-C++ DJGPP Building a GCC Cross-Compiler Porting GCC to your OS Calling Conventions System V ABI Watcom C/C++ Visual Studio Visual C++ Runtime TCC Other Compilers more... Assemblers GAS (GNU as, part of binutils) FASM NASM YASM On the difference between AT&T and Intel Opcode syntax more... Linkers LD (GNU ld, part of binutils) Link Archiver (GNU ar, part of binutils) more... Emulators Bochs QEMU Virtual PC VMware VirtualBox SimICS more... Working with Disk Images Disk Images in general, and ... Loopback Device for Linux, *BSD et al. hdiutil for MacOS X Windows Tools more...