From 90aa13aa29c01287ce48aabd09bab2af8868c5b0 Mon Sep 17 00:00:00 2001
From: TomW <TomW@localhost>
Date: Sun, 31 May 2015 12:30:52 +0100
Subject: [PATCH] Voodoo PCI mapping disabled if base address is zero - fixes
 Voodoo + Sis496/497.

---
 src/vid_voodoo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vid_voodoo.c b/src/vid_voodoo.c
index ec37d39..647c906 100644
--- a/src/vid_voodoo.c
+++ b/src/vid_voodoo.c
@@ -3549,7 +3549,7 @@ static void render_thread(void *param)
 
 static void voodoo_recalcmapping(voodoo_t *voodoo)
 {
-        if (voodoo->pci_enable)
+        if (voodoo->pci_enable && voodoo->memBaseAddr)
         {
                 pclog("voodoo_recalcmapping : memBaseAddr %08X\n", voodoo->memBaseAddr);
                 mem_mapping_set_addr(&voodoo->mapping, voodoo->memBaseAddr, 0x01000000);