Changeset 45208 in vbox for trunk/src/VBox/Devices

Timestamp:

Mar 27, 2013 1:03:13 PM (12 years ago)

Author:

vboxsync

Message:

RTC: Experimental hack for UIP bit being set too long.

File:

• trunk/src/VBox/Devices/PC/DevRTC.cpp (modified) (2 diffs)

trunk/src/VBox/Devices/PC/DevRTC.cpp

@@ -185 +185 @@
     /** The current/previous hinted timer period. */
     int32_t CurHintPeriod;
-    uint32_t u32AlignmentPadding;
+    /** How many consecutive times the UIP has been seen. */
+    int32_t cUipSeen;
 
     /** HPET legacy mode notification interface. */
@@ -315 +316 @@
 
             case RTC_REG_A:
+                if (pThis->cmos_data[RTC_REG_A] & REG_A_UIP)
+                    ++pThis->cUipSeen;
+                else
+                    pThis->cUipSeen = 0;
+                if (pThis->cUipSeen >= 250)
+                {
+                    pThis->cmos_data[pThis->cmos_index[0]] &= ~REG_A_UIP;
+                    pThis->cUipSeen = 0;
+                }
                 *pu32 = pThis->cmos_data[pThis->cmos_index[0]];
                 break;