diff --git a/Src/Debugger/ConsoleDebugger.cpp b/Src/Debugger/ConsoleDebugger.cpp
index 3e4a892..925819d 100644
--- a/Src/Debugger/ConsoleDebugger.cpp
+++ b/Src/Debugger/ConsoleDebugger.cpp
@@ -40,7 +40,7 @@ namespace Debugger
 	CConsoleDebugger::CConsoleDebugger() : CDebugger(), 
 		m_nextFrame(false), m_listDism(0), m_listMem(0), m_analyseCode(true), 
 		m_addrFmt(HexDollar), m_portFmt(Decimal), m_dataFmt(HexDollar),
-		m_showLabels(true), m_labelsOverAddr(true), m_showOpCodes(false), m_memBytesPerRow(12), m_file(NULL)
+		m_showLabels(true), m_labelsOverAddr(true), m_showOpCodes(false), m_memBytesPerRow(16), m_file(NULL)
 	{
 		//
 	}
diff --git a/Src/Debugger/SupermodelDebugger.cpp b/Src/Debugger/SupermodelDebugger.cpp
index f802f55..e7a18f4 100644
--- a/Src/Debugger/SupermodelDebugger.cpp
+++ b/Src/Debugger/SupermodelDebugger.cpp
@@ -62,8 +62,8 @@ namespace Debugger
 		// Interrupts
 		cpu->AddInterrupt("VD0", 0, "Unknown video-related");
 		cpu->AddInterrupt("VBL", 1, "VBlank start");
-		cpu->AddInterrupt("VD2", 2, "Unknown video-related");
-		cpu->AddInterrupt("VD3", 3, "Unknown video-related");
+		cpu->AddInterrupt("VDP", 2, "DP done (display processing)");
+		cpu->AddInterrupt("VGP", 3, "GP done (geometry processing)");
 		cpu->AddInterrupt("NET", 4, "Network");
 		cpu->AddInterrupt("UN5", 5, "Unknown");
 		cpu->AddInterrupt("SND", 6, "SCSP (sound)");
@@ -82,8 +82,8 @@ namespace Debugger
 		cpu->AddRegion(0xC0000000, 0xC00000FF, false, false, "SCSI (Step 1.x)");
 #endif
 #ifdef NET_BOARD
-		cpu->AddRegion(0xC0000000, 0xC001FFFF, false, false, "Network Buffer");
-		cpu->AddRegion(0xC0020000, 0xC003FFFF, false, false, "Network RAM");
+		cpu->AddRegion(0xC0000000, 0xC000FFFF, false, false, "Netboard Shared RAM (Step 1.5+)");
+		cpu->AddRegion(0xC0020000, 0xC002FFFF, false, false, "Netboard Program RAM (Step 1.5+)");
 #endif
 		cpu->AddRegion(0xC1000000, 0xC10000FF, false, false, "SCSI (Step 1.x) (Lost World expects it here)");
 		cpu->AddRegion(0xC2000000, 0xC20000FF, false, false, "Real3D DMA (Step 2.x)");
@@ -91,7 +91,7 @@ namespace Debugger
 		cpu->AddRegion(0xF0080000, 0xF0080007, false, false, "Sound Board Registers");
 		cpu->AddRegion(0xF00C0000, 0xF00DFFFF, false, false, "Backup RAM");
 		cpu->AddRegion(0xF0100000, 0xF010003F, false, false, "System Registers");
-		cpu->AddRegion(0xF0140000, 0xF014003F, false, false, "Real, 0xTime Clock");
+		cpu->AddRegion(0xF0140000, 0xF014003F, false, false, "Real-Time Clock");
 		cpu->AddRegion(0xF0180000, 0xF019FFFF, false, false, "Security Board RAM");
 		cpu->AddRegion(0xF01A0000, 0xF01A003F, false, false, "Security Board Registers");
 		cpu->AddRegion(0xF0800CF8, 0xF0800CFF, false, false, "MPC105 CONFIG_cpu->AddR (Step 1.x)");
@@ -103,6 +103,7 @@ namespace Debugger
 		cpu->AddRegion(0xF8FFF000, 0xF8FFF0FF, false, false, "MPC105 (Step 1.x) or MPC106 (Step 2.x) Registers");
 		cpu->AddRegion(0xF9000000, 0xF90000FF, false, false, "NCR 53C810 Registers (Step 1.x?)");
 		cpu->AddRegion(0xFE040000, 0xFE04003F, false, false, "Mirrored Input Registers");
+		cpu->AddRegion(0xFE100000, 0xFE10003F, false, false, "Mirrored System Registers");
 		cpu->AddRegion(0xFEC00000, 0xFEDFFFFF, false, false, "MPC106 CONFIG_cpu->AddR (Step 2.x)");
 		cpu->AddRegion(0xFEE00000, 0xFEFFFFFF, false, false, "MPC106 CONFIG_DATA (Step 2.x)");
 		cpu->AddRegion(0xFF000000, 0xFF7FFFFF, true,  true,  "Banked CROM (CROMxx)");
diff --git a/Src/Model3/Model3.cpp b/Src/Model3/Model3.cpp
index 20acae9..8769f14 100644
--- a/Src/Model3/Model3.cpp
+++ b/Src/Model3/Model3.cpp
@@ -48,6 +48,9 @@
  * 90000000-9000000B  Real3D VROM Texture Port
  * 94000000-940FFFFF  Real3D Texture FIFO
  * 98000000-980FFFFF  Real3D Polygon RAM
+ * C0000000-C000FFFF  Netboard Shared RAM (Step 1.5+)
+ * C0010000-C00101FF  Netboard Registers (Step 1.5+)
+ * C0020000-C002FFFF  Netboard Program RAM (Step 1.5+)
  * C0000000-C00000FF  SCSI (Step 1.x)
  * C1000000-C10000FF  SCSI (Step 1.x) (Lost World expects it here)
  * C2000000-C20000FF  Real3D DMA (Step 2.x)
@@ -86,14 +89,14 @@
  * F0100014: IRQ Enable
  *   7   6   5   4   3   2   1   0
  * +---+---+---+---+---+---+---+---+
- * | ? |SND| ? |NET|VD3|VD2|VBL|VD0|
+ * | ? |SND| ? |NET|VGP|VDP|VBL|VD0|
  * +---+---+---+---+---+---+---+---+
  *    SND   SCSP (sound)
  *    NET   Network
- *    VD3   Unknown video-related
- *    VD2   Unknown video-related
+ *    VGP   GP done (geometry processing)
+ *    VDP   DP done (display processing)
  *    VBL   VBlank start
- *    VD0   Unknown video-related (?)
+ *    VD0   Unknown video-related
  *    0 = Disable, 1 = Enable
  *
  * Game Buttons
@@ -2042,21 +2045,18 @@ void CModel3::RunMainBoardFrame(void)
 {
 	UINT32 start = CThread::GetTicks();
 
-	// Compute display and VBlank timings
+	// Compute display timings
 	unsigned ppcCycles		= m_config["PowerPCFrequency"].ValueAs<unsigned>() * 1000000;
 	unsigned frameCycles	= (unsigned)((float)ppcCycles / 57.524160f);
-	unsigned offsetCycles   = (unsigned)((float)frameCycles * 33.f / 100.0f);
-	unsigned dispCycles     = frameCycles - offsetCycles;
+    unsigned lineCycles     = frameCycles / 424;
+    unsigned dispCycles     = lineCycles * (TileGen.ReadRegister(0x08) + 40);
+    unsigned offsetCycles   = frameCycles - dispCycles;
 	unsigned statusCycles   = (unsigned)((float)frameCycles * (0.005f));
 
-	// we think a frame looks like this on the model 2
-	//                         66% of frame
-	// [irq2------------------ping_pong_flips------]
-	//
-	// Games will start writing a new frame at the ping_pong time. It could be the buffer swaps here.
-	// Need more h/w testing to confirm.
-	// What we are doing here is asserting IRQ2 at 33% of the frame, and treating the ping_pong flip as the front/back buffer swap
-	// This way the data for the correct frames, ends up in the right frames!
+	// Games will start writing a new frame after the ping-pong buffers have been flipped, which is indicated by the
+    // ping-pong status bit. The timing of ping-pong flip is determined by the value of tilegen register 0x08, which
+    // is the number of active video lines to display before ping-pong flip occurs. Most games set it to 238 or 239
+    // so that ping-pong flip occurs 66% of the frame time after IRQ2, though a few games set it to a higher value.
 
 	// Scale PPC timer ratio according to speed at which the PowerPC is being emulated so that the observed running frequency of the PPC timer
 	// registers is more or less correct.  This is needed to get the Virtua Striker 2 series of games running at the right speed (they are