From f7d3d5c62f7bd67fe8035581f82a23beb0003b19 Mon Sep 17 00:00:00 2001
From: Ain <41307858+nero@users.noreply.github.com>
Date: Fri, 17 Apr 2020 23:59:57 +0200
Subject: [PATCH] Fix addressing mistake when splitting MCB

---
 kernel/mcb.asm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/mcb.asm b/kernel/mcb.asm
index 3d089a8..a0d5ae4 100644
--- a/kernel/mcb.asm
+++ b/kernel/mcb.asm
@@ -26,6 +26,7 @@ mcb_init:
 mcb_split:
 	call mcb_find
 	dec dx
+	push dx
 	; Calculate size of first block
 	; dx = dx - ds - 1
 	stc
@@ -40,9 +41,10 @@ mcb_split:
 	xchg cl, byte [si+0]
 	; advance DS to begin of first block
 	pop ax
-	mov ds, ax
 	stc
 	sbb dx, ax
+	pop ax
+	mov ds, ax
 	; write MCB data
 	mov byte [si+0], cl
 	mov word [si+1], 0