diff --git a/bochs/pc_system.cc b/bochs/pc_system.cc
index 20e7556e0..791239e0b 100644
--- a/bochs/pc_system.cc
+++ b/bochs/pc_system.cc
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////
-// $Id: pc_system.cc,v 1.31 2002-10-25 11:44:33 bdenney Exp $
+// $Id: pc_system.cc,v 1.32 2003-02-14 04:22:16 yakovlev Exp $
 /////////////////////////////////////////////////////////////////////////
 //
 //  Copyright (C) 2002  MandrakeSoft S.A.
@@ -78,6 +78,8 @@ bx_pc_system_c::bx_pc_system_c(void)
   currCountdown       = NullTimerInterval;
   currCountdownPeriod = NullTimerInterval;
   numTimers = 1; // So far, only the nullTimer.
+  lastTimeUsec = 0;
+  usecSinceLast = 0;
 }
 
   void
@@ -419,6 +421,21 @@ bx_pc_system_c::timebp_handler(void* this_ptr)
 }
 #endif // BX_DEBUGGER
 
+  Bit64u
+bx_pc_system_c::time_usec_sequential() {
+    Bit64u this_time_usec = time_usec();
+    if(this_time_usec != lastTimeUsec) {
+      Bit64u diff_usec = this_time_usec-lastTimeUsec;
+      lastTimeUsec = this_time_usec;
+      if(diff_usec >= usecSinceLast) {
+	usecSinceLast = 0;
+      } else {
+	usecSinceLast -= diff_usec;
+      }
+    }
+    usecSinceLast++;
+    return (this_time_usec+usecSinceLast);
+}
   Bit64u
 bx_pc_system_c::time_usec() {
   return (Bit64u) (((double)(Bit64s)time_ticks()) / m_ips );
diff --git a/bochs/pc_system.h b/bochs/pc_system.h
index 0ad25f260..7e23099f9 100644
--- a/bochs/pc_system.h
+++ b/bochs/pc_system.h
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////
-// $Id: pc_system.h,v 1.23 2002-12-15 16:00:41 bdenney Exp $
+// $Id: pc_system.h,v 1.24 2003-02-14 04:22:16 yakovlev Exp $
 /////////////////////////////////////////////////////////////////////////
 //
 //  Copyright (C) 2002  MandrakeSoft S.A.
@@ -70,6 +70,8 @@ private:
   Bit32u     currCountdown; // Current countdown ticks value (decrements to 0).
   Bit32u     currCountdownPeriod; // Length of current countdown period.
   Bit64u     ticksTotal; // Num ticks total since start of emulator execution.
+  Bit64u     lastTimeUsec; // Last sequentially read time in usec.
+  Bit64u     usecSinceLast; // Number of useconds claimed since then.
 
   // A special null timer is always inserted in the timer[0] slot.  This
   // make sure that at least one timer is always active, and that the
@@ -137,6 +139,7 @@ public:
   void activate_timer_ticks(unsigned index, Bit64u instructions,
                             bx_bool continuous);
   Bit64u time_usec();
+  Bit64u time_usec_sequential();
   static BX_CPP_INLINE Bit64u time_ticks() {
     return bx_pc_system.ticksTotal +
       Bit64u(bx_pc_system.currCountdownPeriod - bx_pc_system.currCountdown);