diff --git a/bochs/iodev/display/Makefile.in b/bochs/iodev/display/Makefile.in
index 32092bd20..efe5c67d0 100644
--- a/bochs/iodev/display/Makefile.in
+++ b/bochs/iodev/display/Makefile.in
@@ -93,8 +93,8 @@ libbx_%.la: %.lo
 	$(LIBTOOL) --mode=link --tag CXX $(CXX) -module $< -o $@ -rpath $(PLUGIN_PATH)
 
 # special link rules for plugins that require more than one object file
-libbx_vga.la: vga.lo vgacore.lo
-	$(LIBTOOL) --mode=link --tag CXX $(CXX) -module vga.lo vgacore.lo -o libbx_vga.la -rpath $(PLUGIN_PATH)
+libbx_vga.la: vga.lo vgacore.lo ddc.lo
+	$(LIBTOOL) --mode=link --tag CXX $(CXX) -module vga.lo vgacore.lo ddc.lo -o libbx_vga.la -rpath $(PLUGIN_PATH)
 
 libbx_svga_cirrus.la: svga_cirrus.lo vgacore.lo ddc.lo
 	$(LIBTOOL) --mode=link --tag CXX $(CXX) -module svga_cirrus.lo vgacore.lo ddc.lo -o libbx_svga_cirrus.la -rpath $(PLUGIN_PATH)
@@ -107,8 +107,8 @@ bx_%.dll: %.o
 	$(CXX) $(CXXFLAGS) -shared -o $@ $< $(WIN32_DLL_IMPORT_LIBRARY)
 
 # special link rules for plugins with Cygwin, MinGW/MSYS and MSVC nmake
-bx_vga.dll: vga.o vgacore.o
-	@LINK_DLL@ vga.o vgacore.o $(WIN32_DLL_IMPORT_LIBRARY)
+bx_vga.dll: vga.o vgacore.o ddc.o
+	@LINK_DLL@ vga.o vgacore.o ddc.o $(WIN32_DLL_IMPORT_LIBRARY)
 
 bx_svga_cirrus.dll: svga_cirrus.o vgacore.o ddc.o
 	@LINK_DLL@ svga_cirrus.o vgacore.o ddc.o $(WIN32_DLL_IMPORT_LIBRARY)
@@ -158,7 +158,7 @@ vga.o: vga.@CPP_SUFFIX@ ../iodev.h ../../bochs.h ../../config.h ../../osdep.h \
  ../../gui/siminterface.h ../../cpudb.h ../../gui/paramtree.h \
  ../../memory/memory-bochs.h ../../pc_system.h ../../gui/gui.h \
  ../../instrument/stubs/instrument.h ../../plugin.h ../../extplugin.h \
- ../../param_names.h vgacore.h vga.h ../virt_timer.h
+ ../../param_names.h vgacore.h ddc.h vga.h ../virt_timer.h
 vgacore.o: vgacore.@CPP_SUFFIX@ ../iodev.h ../../bochs.h ../../config.h \
  ../../osdep.h ../../bx_debug/debug.h ../../config.h ../../osdep.h \
  ../../gui/siminterface.h ../../cpudb.h ../../gui/paramtree.h \
@@ -197,7 +197,7 @@ vga.lo: vga.@CPP_SUFFIX@ ../iodev.h ../../bochs.h ../../config.h ../../osdep.h \
  ../../gui/siminterface.h ../../cpudb.h ../../gui/paramtree.h \
  ../../memory/memory-bochs.h ../../pc_system.h ../../gui/gui.h \
  ../../instrument/stubs/instrument.h ../../plugin.h ../../extplugin.h \
- ../../param_names.h vgacore.h vga.h ../virt_timer.h
+ ../../param_names.h vgacore.h ddc.h vga.h ../virt_timer.h
 vgacore.lo: vgacore.@CPP_SUFFIX@ ../iodev.h ../../bochs.h ../../config.h \
  ../../osdep.h ../../bx_debug/debug.h ../../config.h ../../osdep.h \
  ../../gui/siminterface.h ../../cpudb.h ../../gui/paramtree.h \
diff --git a/bochs/iodev/display/vga.cc b/bochs/iodev/display/vga.cc
index edfbe1520..bb7845bf9 100644
--- a/bochs/iodev/display/vga.cc
+++ b/bochs/iodev/display/vga.cc
@@ -2,7 +2,7 @@
 // $Id$
 /////////////////////////////////////////////////////////////////////////
 //
-//  Copyright (C) 2002-2017  The Bochs Project
+//  Copyright (C) 2002-2018  The Bochs Project
 //  PCI VGA dummy adapter Copyright (C) 2002,2003  Mike Nordell
 //
 //  This library is free software; you can redistribute it and/or
@@ -36,6 +36,7 @@
 
 #include "iodev.h"
 #include "vgacore.h"
+#include "ddc.h"
 #include "vga.h"
 #include "virt_timer.h"
 
@@ -84,6 +85,7 @@ bx_bool bx_vga_c::init_vga_extension(void)
   BX_VGA_THIS vbe_present = 0;
   BX_VGA_THIS vbe.enabled = 0;
   BX_VGA_THIS vbe.dac_8bit = 0;
+  BX_VGA_THIS vbe.ddc_enabled = 0;
   BX_VGA_THIS vbe.base_address = 0x0000;
   if (!strcmp(BX_VGA_THIS vgaext->getptr(), "vbe")) {
     BX_VGA_THIS put("BXVGA");
@@ -212,6 +214,7 @@ void bx_vga_c::register_state(void)
     new bx_shadow_bool_c(vbe, "lfb_enabled", &BX_VGA_THIS vbe.lfb_enabled);
     new bx_shadow_bool_c(vbe, "get_capabilities", &BX_VGA_THIS vbe.get_capabilities);
     new bx_shadow_bool_c(vbe, "dac_8bit", &BX_VGA_THIS vbe.dac_8bit);
+    new bx_shadow_bool_c(vbe, "ddc_enabled", &BX_VGA_THIS vbe.ddc_enabled);
   }
 }
 
@@ -846,7 +849,7 @@ Bit32u bx_vga_c::vbe_read(Bit32u address, unsigned io_len)
 #else
   UNUSED(this_ptr);
 #endif  // BX_USE_VGA_SMF == 0
-  Bit16u retval;
+  Bit16u retval = 0;
 
 //  BX_INFO(("VBE_read %x (len %x)", address, io_len));
 
@@ -911,13 +914,20 @@ Bit32u bx_vga_c::vbe_read(Bit32u address, unsigned io_len)
       case VBE_DISPI_INDEX_VIDEO_MEMORY_64K:
         return (VBE_DISPI_TOTAL_VIDEO_MEMORY_KB >> 6);
 
+      case VBE_DISPI_INDEX_DDC:
+        if (BX_VGA_THIS vbe.ddc_enabled) {
+          retval = (1 << 7) | BX_VGA_THIS ddc.read();
+        } else {
+          retval = 0x000f;
+        }
+        break;
+
       default:
-        BX_PANIC(("VBE unknown data read index 0x%x",BX_VGA_THIS vbe.curindex));
+        BX_ERROR(("VBE unknown data read index 0x%x",BX_VGA_THIS vbe.curindex));
         break;
     }
   }
-  BX_PANIC(("VBE_read shouldn't reach this"));
-  return 0; /* keep compiler happy */
+  return retval;
 }
 
 void bx_vga_c::vbe_write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len)
@@ -1265,6 +1275,14 @@ Bit32u bx_vga_c::vbe_write(Bit32u address, Bit32u value, unsigned io_len)
         case VBE_DISPI_INDEX_VIRT_HEIGHT:
           BX_ERROR(("VBE: write to virtual height register ignored"));
           break;
+        case VBE_DISPI_INDEX_DDC:
+          if ((value >> 7) & 1) {
+            BX_VGA_THIS vbe.ddc_enabled = 1;
+            BX_VGA_THIS ddc.write(value & 1, (value >> 1) & 1);
+          } else {
+            BX_VGA_THIS vbe.ddc_enabled = 0;
+          }
+          break;
         default:
           BX_ERROR(("VBE: write unsupported register at index 0x%x",BX_VGA_THIS vbe.curindex));
           break;
diff --git a/bochs/iodev/display/vga.h b/bochs/iodev/display/vga.h
index c61eaa20b..2bc75babd 100644
--- a/bochs/iodev/display/vga.h
+++ b/bochs/iodev/display/vga.h
@@ -2,7 +2,7 @@
 // $Id$
 /////////////////////////////////////////////////////////////////////////
 //
-//  Copyright (C) 2002-2017  The Bochs Project
+//  Copyright (C) 2002-2018  The Bochs Project
 //  PCI VGA dummy adapter Copyright (C) 2002,2003  Mike Nordell
 //
 //  This library is free software; you can redistribute it and/or
@@ -50,6 +50,7 @@
 #define VBE_DISPI_INDEX_X_OFFSET         0x8
 #define VBE_DISPI_INDEX_Y_OFFSET         0x9
 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
+#define VBE_DISPI_INDEX_DDC              0xb
 
 #define VBE_DISPI_ID0                    0xB0C0
 #define VBE_DISPI_ID1                    0xB0C1
@@ -162,7 +163,10 @@ private:
     bx_bool lfb_enabled;
     bx_bool get_capabilities;
     bx_bool dac_8bit;
+    bx_bool ddc_enabled;
   } vbe;  // VBE state information
+
+  bx_ddc_c ddc;
 };
 
 #endif