From 9d4479bd86aea110284a65daa54ae78bf7a87271 Mon Sep 17 00:00:00 2001
From: Elaina Claus <elaina.claus@chtm.me>
Date: Thu, 17 Oct 2024 14:17:15 -0400
Subject: [PATCH] clear dh and al

---
 include/BIOS/func/ext_read.nasm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/BIOS/func/ext_read.nasm b/include/BIOS/func/ext_read.nasm
index 73d2d9c..72ddc4a 100644
--- a/include/BIOS/func/ext_read.nasm
+++ b/include/BIOS/func/ext_read.nasm
@@ -107,6 +107,8 @@ read_disk_raw:
     movzx ax, byte [bp + 4]
     mov word [bx + LBAPkt_t.segment], ax
 
+    xor ax, ax
+    xor dx, dx
     mov si, bx                  ; ds:si LBAPkt_t
     mov ah, 0x42                ; call #
     mov dl, byte [bp + 14]      ; drive #