Disable interrupts, initialize segment registers and stack

2022-01-27 02:24:24 +05:00 · 2022-01-27 02:24:24 +05:00 · 72da86a252
parent d241701b21
commit 72da86a252
1 changed files with 9 additions and 0 deletions
--- a/src/x86_stage1.S
+++ b/src/x86_stage1.S
@ -5,6 +5,15 @@
 .global _start
 .section .text
 _start:
+    cli
+    xor %ax, %ax
+    mov %ax, %ss
+    mov %ax, %ds
+    mov %ax, %es
+    mov %ax, %fs
+    mov %ax, %gs
+    mov $0x2000, %sp
+
    mov $0x02,   %ah
    mov $1,      %al /* Sectors count       */
    mov $0x80,   %dl /* Drive               */