arno/linux-insides
1
0
Fork 0
mirror of https://github.com/0xAX/linux-insides.git synced 2024-12-22 22:58:08 +00:00
Code Issues Releases Wiki Activity

Update linux-bootstrap-1.md

Browse Source
This commit is contained in:
0xAX 2015-02-10 22:56:59 +06:00
parent b4c47f9466
commit eca46a8a8a
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Booting/linux-bootstrap-1.md
View File

@ -100,6 +100,9 @@ SECTIONS {
Now the BIOS has started to work. After initializing and checking the hardware, it needs to find a bootable device. A boot order is stored in the BIOS configuration, controlling which devices the kernel attempts to boot. In the case of attempting to boot a hard drive, the BIOS tries to find a boot sector. On hard drives partitioned with an MBR partition layout, the boot sector is stored in the first 446 bytes of the first sector (512 bytes). The final two bytes of the first sector contain `0x55` and `0xaa` which signals the BIOS that the device as bootable. For example: Now the BIOS has started to work. After initializing and checking the hardware, it needs to find a bootable device. A boot order is stored in the BIOS configuration, controlling which devices the kernel attempts to boot. In the case of attempting to boot a hard drive, the BIOS tries to find a boot sector. On hard drives partitioned with an MBR partition layout, the boot sector is stored in the first 446 bytes of the first sector (512 bytes). The final two bytes of the first sector contain `0x55` and `0xaa` which signals the BIOS that the device as bootable. For example:
```assembly ```assembly
#
# Note: this example written with Intel syntax
#
[BITS 16] [BITS 16]
[ORG 0x7c00] [ORG 0x7c00]