diff --git a/drivers/ddk/core.S b/drivers/ddk/core.S
index 4f5b143286..3c5bb03dad 100644
--- a/drivers/ddk/core.S
+++ b/drivers/ddk/core.S
@@ -22,6 +22,10 @@
 
     .global _MapIoMem
 
+    .global _MutexInit
+    .global _MutexLock
+    .global _MutexUnlock
+
     .global _PciApi
     .global _PciRead16
     .global _PciRead32
@@ -32,6 +36,7 @@
 
     .global _RegService
 
+    .global _SetMouseData
     .global _SetScreen
     .global _SysMsgBoardStr
 
@@ -55,6 +60,10 @@
 
     .def  _MapIoMem;          .scl  2;  .type 32; .endef
 
+    .def  _MutexInit;         .scl  2;  .type 32; .endef
+    .def  _MutexLock;         .scl  2;  .type 32; .endef
+    .def  _MutexUnlock;       .scl  2;  .type 32; .endef
+
     .def  _PciApi;            .scl  2;  .type 32; .endef
     .def  _PciRead16;         .scl  2;  .type 32; .endef
     .def  _PciRead32;         .scl  2;  .type 32; .endef
@@ -66,6 +75,7 @@
     .def  _RegService;        .scl  2;  .type 32; .endef
 
     .def  _SetScreen;         .scl  2;  .type 32; .endef
+    .def  _SetMouseData;      .scl  2;  .type 32; .endef
     .def  _SysMsgBoardStr;    .scl  2;  .type 32; .endef
 
 
@@ -89,6 +99,10 @@ _KernelFree:
 
 _MapIoMem:
 
+_MutexInit:
+_MutexLock:
+_MutexUnlock:
+
 _PciApi:
 _PciRead16:
 _PciRead32:
@@ -99,6 +113,7 @@ _PciWrite8:
 
 _RegService:
 
+_SetMouseData:
 _SetScreen:
 _SysMsgBoardStr:
         ret
@@ -125,6 +140,10 @@ _SysMsgBoardStr:
 
         .ascii " -export:MapIoMem"             # stdcall
 
+        .ascii " -export:MutexInit"            # fastcall
+        .ascii " -export:MutexLock"            # fastcall
+        .ascii " -export:MutexUnlock"          # fastcall
+
         .ascii " -export:PciApi"               #
         .ascii " -export:PciRead16"            # stdcall
         .ascii " -export:PciRead32"            # stdcall
@@ -135,6 +154,7 @@ _SysMsgBoardStr:
 
         .ascii " -export:RegService"           # stdcall
 
+        .ascii " -export:SetMouseData"         # stdcall
         .ascii " -export:SetScreen"            # stdcall
         .ascii " -export:SysMsgBoardStr"       # stdcall
 
diff --git a/drivers/include/syscall.h b/drivers/include/syscall.h
index c935795ad8..fac26a727f 100644
--- a/drivers/include/syscall.h
+++ b/drivers/include/syscall.h
@@ -25,8 +25,10 @@ u32_t drvEntry(int, char *)__asm__("_drvEntry");
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#define STDCALL __attribute__ ((stdcall)) __attribute__ ((dllimport))
-#define IMPORT __attribute__ ((dllimport))
+#define STDCALL  __attribute__ ((stdcall)) __attribute__ ((dllimport))
+#define FASTCALL __attribute__ ((fastcall)) __attribute__ ((dllimport))
+
+#define IMPORT   __attribute__ ((dllimport))
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -61,6 +63,9 @@ u32_t STDCALL RegService(char *name, srv_proc_t proc)__asm__("RegService");
 
 int   STDCALL AttachIntHandler(int irq, void *handler, u32_t access) __asm__("AttachIntHandler");
 
+void  FASTCALL MutexInit(struct mutex*)__asm__("MutexInit");
+void  FASTCALL MutexLock(struct mutex*)__asm__("MutexLock");
+void  FASTCALL MutexUnlock(struct mutex*)__asm__("MutexUnlock");
 
 ///////////////////////////////////////////////////////////////////////////////
 
diff --git a/kernel/trunk/core/peload.inc b/kernel/trunk/core/peload.inc
index d85ec4d887..d1d40e6c0c 100644
--- a/kernel/trunk/core/peload.inc
+++ b/kernel/trunk/core/peload.inc
@@ -293,6 +293,10 @@ __exports:
           free,                  'Kfree',              \
           map_io_mem,            'MapIoMem',           \      ; stdcall
           get_pg_addr,           'GetPgAddr',          \      ; eax
+\
+          mutex_init,            'MutexInit',          \      ; gcc fastcall
+          mutex_lock,            'MutexLock',          \      ; gcc fastcall
+          mutex_unlock,          'MutexUnlock',        \      ; gcc fastcall
 \
           get_display,           'GetDisplay',         \
           set_screen,            'SetScreen',          \
diff --git a/kernel/trunk/core/sched.inc b/kernel/trunk/core/sched.inc
index c77f7e1b16..00b4551bca 100644
--- a/kernel/trunk/core/sched.inc
+++ b/kernel/trunk/core/sched.inc
@@ -217,7 +217,108 @@ do_change_task:
   @@:   ret
 ;end.
 
+
+
+struc MUTEX_WAITER
+{
+    .next   rd 1
+    .prev   rd 1
+    .task   rd 1
+    .sizeof:
+};
+
+virtual at 0
+ MUTEX_WAITER MUTEX_WAITER
+end virtual
+
+;void  __fastcall mutex_init(struct mutex *lock)
+
+align 4
+mutex_init:
+        lea eax, [ecx+MUTEX.next]
+        mov [ecx+MUTEX.count],1
+        mov [ecx+MUTEX.next], eax
+        mov [ecx+MUTEX.prev], eax
+        ret
+
+
+;void  __fastcall mutex_lock(struct mutex *lock)
+
+align 4
+mutex_lock:
+
+        dec [ecx+MUTEX.count]
+        jns .done
+
+        pushfd
+        cli
+
+        push esi
+        sub esp, MUTEX_WAITER.sizeof
+
+        mov eax, [ecx+MUTEX.prev]
+        lea esi, [ecx+MUTEX.next]
+
+        mov [ecx+MUTEX.prev], esp
+        mov [esp+MUTEX_WAITER.next],  esi
+        mov [esp+MUTEX_WAITER.prev],  eax
+        mov [eax], esp
+
+        mov edx, [TASK_BASE]
+        mov [esp+MUTEX_WAITER.task], edx
+
+.forever:
+
+        mov eax, -1
+        xchg eax, [ecx+MUTEX.count]
+        dec eax
+        jz @F
+
+        mov [edx+TASKDATA.state], 1
+        call change_task
+        jmp .forever
+@@:
+        mov edx, [esp+MUTEX_WAITER.next]
+        mov eax, [esp+MUTEX_WAITER.prev]
+
+        mov [eax+MUTEX_WAITER.next], edx
+        cmp [ecx+MUTEX.next], esi
+        mov [edx+MUTEX_WAITER.prev], eax
+        jne @F
+
+        mov [ecx+MUTEX.count], 0
+@@:
+        add  esp, MUTEX_WAITER.sizeof
+
+        pop esi
+        popfd
+.done:
+        ret
+
+;void  __fastcall mutex_unlock(struct mutex *lock)
+
+align 4
+mutex_unlock:
+
+        pushfd
+        cli
+
+        lea eax, [ecx+MUTEX.next]
+        cmp eax, [ecx+MUTEX.next]
+        mov [ecx+MUTEX.count], 1
+        je @F
+
+        mov eax, [eax+MUTEX_WAITER.task]
+        mov [eax+TASKDATA.state], 0
+@@:
+        popfd
+        ret
+
+
+purge MUTEX_WAITER
+
 if 0
+
 struc TIMER
 {
   .next      dd ?
diff --git a/kernel/trunk/kernel32.inc b/kernel/trunk/kernel32.inc
index 071f655345..b0707c178c 100644
--- a/kernel/trunk/kernel32.inc
+++ b/kernel/trunk/kernel32.inc
@@ -194,6 +194,17 @@ end virtual
 
 ;// mike.dld, 2006-29-01 ]
 
+struc MUTEX
+{
+    .count  rd 1
+    .next   rd 1
+    .prev   rd 1
+}
+
+virtual at 0
+ MUTEX MUTEX
+end virtual
+
 
 ; Core functions
 include "core/sync.inc"     ; macros for synhronization objects