Changeset 25594 in vbox for trunk/src/VBox/Devices/Bus

Timestamp:

Dec 30, 2009 1:50:54 PM (15 years ago)

Author:

vboxsync

Message:

PCI: Bits 0-1 of the address register are reserved. Real hardware clears these silently

File:

• trunk/src/VBox/Devices/Bus/DevPCI.cpp (modified) (1 diff)

trunk/src/VBox/Devices/Bus/DevPCI.cpp

@@ -1134 +1134 @@
         PPCIGLOBALS pThis = PDMINS_2_DATA(pDevIns, PPCIGLOBALS);
         PCI_LOCK(pDevIns, VINF_IOM_HC_IOPORT_WRITE);
-        pThis->uConfigReg = u32;
+        pThis->uConfigReg = u32 & ~3; /* Bits 0-1 are reserved and we silently clear them */
         PCI_UNLOCK(pDevIns);
     }