diff --git a/kernel/trunk/core/debug.inc b/kernel/trunk/core/debug.inc
index 74ead68aba..0b3376bef0 100644
--- a/kernel/trunk/core/debug.inc
+++ b/kernel/trunk/core/debug.inc
@@ -421,6 +421,7 @@ debugger_notify:
 debug_exc:
 ; int 1 = #DB
 	save_ring3_context
+	cld
 	mov	ax, os_data
 	mov	ds, ax
 	mov	es, ax
diff --git a/kernel/trunk/core/sys32.inc b/kernel/trunk/core/sys32.inc
index a7137cc1f5..7245338c1a 100644
--- a/kernel/trunk/core/sys32.inc
+++ b/kernel/trunk/core/sys32.inc
@@ -246,6 +246,7 @@ exc_c:
 .debug:
 ; we are debugged process, notify debugger and suspend ourself
 ; eax=debugger PID
+        cld
         movzx ecx, bl
         push  ecx
         mov   ecx, [0x3010]
diff --git a/kernel/trunk/fs/fat12.inc b/kernel/trunk/fs/fat12.inc
index 62a71c9688..22b78a6890 100644
--- a/kernel/trunk/fs/fat12.inc
+++ b/kernel/trunk/fs/fat12.inc
@@ -1328,14 +1328,14 @@ fs_FloppyRead:
         jz      .eof
         cmp     edi, 0xFF8
         jae     .eof
+        sub     ebx, 512
+        jae     .skip
         lea     eax, [edi+31]
         pusha
         call    read_chs_sector
         popa
         cmp     [FDC_Status], 0
         jnz     .err
-        sub     ebx, 512
-        jae     .skip
         lea     eax, [0xD000+ebx+512]
         neg     ebx
         push    ecx