From: bellard <bellard>
Date: Mon, 25 Sep 2006 21:41:20 +0000 (+0000)
Subject: VBE 4 bit bank selection fix (Volker Rupper)
X-Git-Tag: release_0_9_1~1714
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=f5e99a6b1c1be8142187efd99d2807e22df286db;p=qemu-xen-4.1-testing.git

VBE 4 bit bank selection fix (Volker Rupper)
---

diff --git a/hw/vga.c b/hw/vga.c
index 0609f84cc..5acacf9b3 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -447,7 +447,11 @@ static void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
             }
             break;
         case VBE_DISPI_INDEX_BANK:
-            val &= s->vbe_bank_mask;
+            if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
+              val &= (s->vbe_bank_mask >> 2);
+            } else {
+              val &= s->vbe_bank_mask;
+            }
             s->vbe_regs[s->vbe_index] = val;
             s->bank_offset = (val << 16);
             break;