Changeset 34697 in vbox for trunk/src/VBox/Devices

Timestamp:

Dec 3, 2010 2:10:43 PM (14 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

68499

Message:

PIC: Clear IRR bit when edge triggered IRQ is deasserted.

File:

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

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

@@ -187 +187 @@
             s->last_irr |= mask;
         } else {
+            s->irr &= ~mask;
             s->last_irr &= ~mask;
         }
@@ -248 +249 @@
         /* if irq request by slave pic, signal master PIC */
         pic_set_irq1(&pics[0], 2, 1);
+    } else {
+        /* If not, clear the IR on the master PIC. */
         pic_set_irq1(&pics[0], 2, 0);
     }