diff options
| author | Dennis Kobert <dennis@kobert.dev> | 2019-10-25 03:59:21 +0200 |
|---|---|---|
| committer | Dennis Kobert <dennis@kobert.dev> | 2019-10-25 03:59:21 +0200 |
| commit | 92ad44ce3af9b000146d324e5c0f5dfce16927f9 (patch) | |
| tree | b350c1eda444a67d165882ea42dd41fb3ba9e946 /kernel/src/long_mode_init.asm | |
| parent | f45b2e7c13b3c8821832374e3e8860eabaaae5d2 (diff) | |
Start 64bit mode
Diffstat (limited to 'kernel/src/long_mode_init.asm')
| -rw-r--r-- | kernel/src/long_mode_init.asm | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/src/long_mode_init.asm b/kernel/src/long_mode_init.asm new file mode 100644 index 0000000..f105388 --- /dev/null +++ b/kernel/src/long_mode_init.asm @@ -0,0 +1,17 @@ +global long_mode_start + +section .text +bits 64 +long_mode_start: + ; load 0 into all data segment registers + mov ax, 0 + mov ss, ax + mov ds, ax + mov es, ax + mov fs, ax + mov gs, ax + + ; print `Uff!` to screen + mov rax, 0x8521846683668255 + mov qword [0xb8000], rax + hlt |