diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/src/boot.asm | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/src/boot.asm b/kernel/src/boot.asm index 839457e..a10b14c 100644 --- a/kernel/src/boot.asm +++ b/kernel/src/boot.asm @@ -3,6 +3,22 @@ global start section .text bits 32 start: + mov esp, stack_top + ; print 'OK' mov dword [0xb8000], 0x2f4b2f4f hlt + +; Prints 'ERR: ' and the given error code to the screen and halts +; parameter: error code letter (ascii) in al +error: + mov dword [0xb8000], 0x4f524f45 + mov dword [0xb8004], 0x4f3a4f52 + mov dword [0xb8008], 0x4f504f20 + mov byte [0xb800a], al + hlt + +section .bss +stack_bottom: + resb 64 +stack_top: |