Changeset 33178 in vbox for trunk

Timestamp:

Oct 16, 2010 8:25:02 PM (14 years ago)

Author:

vboxsync

Message:

VGA: Improve compatibility with bad old VESA software (Sanctuary Woods).

File:

• trunk/src/VBox/Devices/Graphics/DevVGA.cpp (modified) (1 diff)

trunk/src/VBox/Devices/Graphics/DevVGA.cpp

@@ -948 +948 @@
             else
                 max_bank = s->vbe_bank_max;
+            /* Old software may pass garbage in the high byte of bank. If the maximum
+             * bank fits into a single byte, toss the high byte the user supplied.
+             */
+            if (max_bank < 0x100)
+                val &= 0xff;
             if (val > max_bank)
                 val = max_bank;