Orange的专栏

自己动手写操作系统--"Hello, OS world!"       作者：zieckey(zieckey@yahoo.com.cn)1、开发环境与工具开发环境:winxp+sp2必须安装Bochs-2.3,nasm,UltraEdit.下载nasm后,添加nasm所在目录到到path目录,建议直接将nasm放到windows或system32目录,方便从命令行调用.下载

 1 !  2 ! SYS_SIZE is the number of clicks (16 bytes) to be loaded.  3 ! 0x3000 is 0x30000 bytes = 196kB, more than enough for current  4 ! versions of linux  5 !  6 SYSSIZE = 0x3000  7 !  8 !       b

 1 !  2 !       setup.s         (C) 1991 Linus Torvalds  3 !  4 ! setup.s is responsible for getting the system data from the BIOS,  5 ! and putting them into the appropriate places in system memory. 

1 /* 2 * linux/boot/head.s 3 * 4 * (C) 1991 Linus Torvalds 5 */ 6 7 /* 8 * head.s contains the 32-bit startup code. 9 * 10 * NOTE!!! Startup happens at absolute