From 0be389b23505c73cf11bb0df51afe80ef927ec0a Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Tue, 23 Jun 2020 22:22:45 +0200
Subject: Added root directory verification

---
 src/entry.asm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/entry.asm')

diff --git a/src/entry.asm b/src/entry.asm
index 1445596..afe004c 100644
--- a/src/entry.asm
+++ b/src/entry.asm
@@ -112,9 +112,14 @@ stage_two:
 	mov si, inode_table_msg
 	call print
 
-	; TODO: File crawling instead of fixed inode
+	; Load root dir
 	xor bx, bx
+	mov ax, bx
 	mov bx, 0x1080 ; First block ((2 - 1) * 128 + dest)
+	mov ax, word [bx + 0] ; Filetype
+	and ax, 0x4000 ; Check if dir
+	cmp ax, 0x4000
+	jne disk_error
 	mov cx, [bx + 28] ; Number of sectors for inode
 	lea di, [bx + 40] ; Address of first block pointer
 
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