From 82540583ddbc05cba770ca40ad6c5117e93746f0 Mon Sep 17 00:00:00 2001
From: TC1995 <mariogplayer90@gmail.com>
Date: Fri, 23 Mar 2018 20:00:37 +0100
Subject: [PATCH] Added CRTCB reg 0xEE color depth part, fixes SVGA detection
 with the et4000w32p on OS/2 2.1x/3.x/4.x.

---
 src/video/vid_et4000w32.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/video/vid_et4000w32.c b/src/video/vid_et4000w32.c
index 19bb5c0a8..defe6a586 100644
--- a/src/video/vid_et4000w32.c
+++ b/src/video/vid_et4000w32.c
@@ -285,6 +285,15 @@ uint8_t et4000w32p_in(uint16_t addr, void *p)
                 case 0x214B: case 0x215B: case 0x216B: case 0x217B:
                 if (et4000->index==0xec) 
                         return (et4000->regs[0xec] & 0xf) | 0x60; /*ET4000/W32p rev D*/
+				if (et4000->index == 0xee) /*Preliminary implementation*/
+				{
+					if (svga->bpp == 8)
+						return 3;
+					else if (svga->bpp == 16)
+						return 4;
+					else
+						break;
+				}
                 if (et4000->index == 0xef) 
                 {
                         if (et4000->pci) return et4000->regs[0xef] | 0xe0;       /*PCI*/