Enable A20 line at boot.

Author: https://github.com/awesomekling Commit: https://github.com/SerenityOS/serenity/commit/99ee6acd692
2018-10-27 14:09:33 +02:00 · 2018-10-27 14:09:33 +02:00 · 99ee6acd69 · 2024-07-19 18:37:39 +09:00
commit 99ee6acd69
parent 601d0d1739
1 changed files with 4 additions and 0 deletions
--- a/Kernel/Boot/boot.asm
+++ b/Kernel/Boot/boot.asm
@ -21,6 +21,10 @@ boot:
    cmp     al, 0
    jne     .lewp

+    ; Enable A20
+    mov     ax, 0x2401
+    int     0x15
+
    mov     bx, 0x1000
    mov     es, bx
    xor     bx, bx              ; Load kernel @ 0x10000