eternalpeace / binaryos

Make the own OS, Step from 0 to 1.

BinaryOS

Make the own OS, Step from 0 to 1.

empty.img: get from the command: dd if=/dev/zero of=empty.img bs=512 count=2880 and modify the address of 510, from 0000 to 55aa protectmode cd protect nasm protect2MBR.asm -o protect2MBR.bin dd if=protect2MBR.bin of=protect.img bs=512 count=1 conv=notrunc qemu-system-x86 protect.img or bochs r2p2r.asm ：the file from real mode switch to protect mode and switch to real mode. how to build: nasm r2p2r.asm -o r2p2r.bin

floppy.img is copy from empty.img, and has a filesystem: 
mkfs.msdos floppy.img
mount -o loop floppy.img /mnt
    copy some file to floppy.img
cp <filename> /mnt
insert the floppy.img to VM's driver A
    execute the filename
a:\r2p2r.com

r32g2r.asm:from ring3 to callgate to realmode
callgates.asm :use callgates
usepage.asm: page use and page switch
idttest.asm: interrupt and idt test

boot cd boot boot's files can realize boot and load the loader.bin file,and execute the loader file boot.asm nasm boot.asm -o boot.bin dd if=boot.bin of=floppy.img count=1 conv=notrunc loader.asm nasm loader.asm -o loader.bin mount floppy.img and copy loader.bin to the mount file.

assemble hello.asm test the linux assemble

binaryos:from realmode to protect ├── boot │   ├── boot.asm :load loader.bin文件,从loader.bin启动 │   ├── include │   │   ├── fat12hdr.inc :FAT12 磁盘的头文件 │   │   ├── load.inc :加载地址，页目录地址，程序入口地址 宏 │   │   └── pm.inc :保护模式下宏，门,描述符，选择子类型 │   ├── loader.asm :set GDT,加载kernel.bin文件，跳转到保护模式代码，显示内存并分页，然后复制kernel.bin程序到虚拟地址，并执行 ├── floppy.img :软盘镜像 ├── include │   ├── const.h :GDT,IDT大小，8259A控制器端口 │   ├── global.h : 全局变量 │   ├── protect.h : 存储段描述符/系统段描述符,门描述符,描述符类型值说明,存储段描述符类型值说明,中断向量 │   ├── proto.h :klib.asm中函数原型声明 │   ├── string.h : memcpy函数声明 │   └── type.h :类型声明 ├── kernel │   ├── global.c :全局变量 │   ├── i8259.c :初始化8259中断控制器,和中断函数 │   ├── kernel.asm :重新设置GDT,设置中断宏,中断和异常 │   ├── protect.c :初始化中断门，声明中断处理函数，(常见中断和8259中断) │   ├── start.c :在保护模式下，重新设置GDT,IDT到内核中,初始化中断 ├── lib │   ├── kliba.asm :显示函数 │   ├── klib.c :整形转换为字符串 │   ├── string.asm :memcpy实现 └── Makefile