michaelkuc6/blog_os
1
0
Fork 0
mirror of https://github.com/phil-opp/blog_os.git synced 2025-12-16 22:37:49 +00:00
Code Issues Projects Releases Wiki Activity

Fix hex constant (#193)

Browse Source 
I assume these were in the wrong order since all the others looked this way :)
This commit is contained in:
Anton Strömkvist
2016-07-28 18:01:42 +02:00
committed by Philipp Oppermann
parent 826e303ed0
commit 6b2f1281ae
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
blog/post/2015-08-18-multiboot-kernel.md
View File

@@ -110,7 +110,7 @@ There are some new commands:
- `global` exports a label (makes it public). As `start` will be the entry point of our kernel, it needs to be public.
- the `.text` section is the default section for executable code
- `bits 32` specifies that the following lines are 32-bit instructions. It's needed because the CPU is still in [Protected mode] when GRUB starts our kernel. When we switch to [Long mode] in the [next post] we can use `bits 64` (64-bit instructions).
- the `mov dword` instruction moves the 32bit constant `0x2f4f2f4b` to the memory at address `b8000` (it prints `OK` to the screen, an explanation follows in the next posts)
- the `mov dword` instruction moves the 32bit constant `0x2f4b2f4f` to the memory at address `b8000` (it prints `OK` to the screen, an explanation follows in the next posts)
- `hlt` is the halt instruction and causes the CPU to stop
Through assembling, viewing and disassembling we can see the CPU [Opcodes] in action: