From 0fa19c3387b6db73ab08102652006154361b92e7 Mon Sep 17 00:00:00 2001
From: TC1995 <mariogplayer90@gmail.com>
Date: Mon, 26 Apr 2021 22:48:42 +0200
Subject: [PATCH] Made the 868 properly recognize itself as a true 868, instead
 of 866 (should also fix NT 4.0's graphical bugs with it)

---
 src/video/vid_s3.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/video/vid_s3.c b/src/video/vid_s3.c
index 8fb271bbc..be00fed2b 100644
--- a/src/video/vid_s3.c
+++ b/src/video/vid_s3.c
@@ -6026,7 +6026,8 @@ static void *s3_init(const device_t *info)
 		case S3_PHOENIX_VISION868:
 			svga->decode_mask = (4 << 20) - 1;
 			s3->id = 0xe1; /*Vision868*/
-			s3->id_ext = s3->id_ext_pci = 0x80;
+			s3->id_ext = 0x90;
+			s3->id_ext_pci = 0x80;
 			s3->packed_mmio = 1;
 			if (s3->pci) {
 				svga->crtc[0x53] = 0x18;