- skichamp now works, but controls are not hooked up and seems to overload the display lists like many non-working Step 2.x games do. To bypass the drive board error, enter the test menu and exit again. It will reboot and run.

- Added some notes on the cause of the "NO DAUGHTER BOARD DETECTED" error in Real3D.cpp.
- Removed some debug code from texture uploader.

Src/CPU/PowerPC/ppc603.c

@@ -284,12 +284,11 @@ int ppc_execute(int cycles)
 	{
 		ppc.pc = ppc.npc;
 		
-		//if (ppc.pc == 0x279C)
+		// Debug breakpoints
-		//	printf("R3=%08X\n", REG(3));
+		//if (ppc.pc == 0x9e4d4)
+		//	printf("%X R0=%08X\n", ppc.pc, REG(0));
 			
 		opcode = *ppc.op++;	// Supermodel byte reverses each aligned word (converting them to little endian) so they can be fetched directly
-		//opcode = BSWAP32(*ppc.op++);
-
 		ppc.npc = ppc.pc + 4;
 
 #ifdef SUPERMODEL_DEBUGGER

Src/Graphics/Render3D.cpp

@@ -381,7 +381,8 @@ void CRender3D::UploadTextures(unsigned x, unsigned y, unsigned width, unsigned
 {
 	unsigned	xi, yi;
 	
-	// debug: make everything red
+	// Make everything red
+#ifdef DEBUG
 	for (int i = 0; i < 512*512; )
 	{
 		textureBuffer[i++] = 1.0f;
@@ -389,6 +390,7 @@ void CRender3D::UploadTextures(unsigned x, unsigned y, unsigned width, unsigned
 		textureBuffer[i++] = 0.0f;
 		textureBuffer[i++] = 1.0f;
 	}
+#endif
 
 	for (xi = x/32; xi < (x+width)/32; xi++)
 		for (yi = y/32; yi < (y+height)/32; yi++)

Src/Model3/Model3.cpp

@@ -1126,7 +1126,7 @@ void CModel3::Write8(UINT32 addr, UINT8 data)
 			
 		// Sound Board
 		case 0x08:
-			//printf("PPC: %08X=%02X * (PC=%08X, LR=%08X)\n", addr, data, ppc_get_pc(), ppc_get_lr());
+			printf("PPC: %08X=%02X * (PC=%08X, LR=%08X)\n", addr, data, ppc_get_pc(), ppc_get_lr());
 			if ((addr&0xF) == 0)		// MIDI data port
 				SoundBoard.WriteMIDIPort(data);
 			else if ((addr&0xF) == 4)	// MIDI control port
@@ -1916,10 +1916,6 @@ void CModel3::RunFrame(void)
 #endif
 	}
 	
-	// End frame
-	GPU.EndFrame();
-	TileGen.EndFrame();
-	IRQ.Assert(0x0D);
 	return;
 
 ThreadError:
@@ -2123,6 +2119,7 @@ void CModel3::RunMainBoardFrame(void)
 	 * by writing 0x37 and will disable/enable interrupts to control command
 	 * output.
 	 */
+	//printf("\t-- BEGIN (Ctrl=%02X, IRQEn=%02X, IRQPend=%02X) --\n", midiCtrlPort, IRQ.ReadIRQEnable()&0x40, IRQ.ReadIRQState());
 	int irqCount = 0;
 	while ((midiCtrlPort&0x20))
 	//while (midiCtrlPort == 0x27)	// 27 triggers IRQ sequence, 06 stops it
@@ -2140,11 +2137,16 @@ void CModel3::RunMainBoardFrame(void)
 		++irqCount;
 		if (irqCount > 128)
 		{
-			printf("MIDI FIFO OVERFLOW!\n");
+			printf("\tMIDI FIFO OVERFLOW! (IRQEn=%02X, IRQPend=%02X)\n", IRQ.ReadIRQEnable()&0x40, IRQ.ReadIRQState());
 			break;
 		}
 	}
-	IRQ.Deassert(0x40);	//todo: no longer needed, remove it
+	//printf("\t-- END --\n");
+
+	// End frame
+	GPU.EndFrame();
+	TileGen.EndFrame();
+	IRQ.Assert(0x0D);
 }
 
 void CModel3::Reset(void)
@@ -2365,6 +2367,11 @@ void CModel3::Patch(void)
 		
 		*(UINT32 *) &crom[0x600000+0x3199C] = 0x60000000;
 	}
+	else if (!strcmp(Game->id, "skichamp"))
+	{
+		// Base address of program in CROM: 0x480000
+		*(UINT32 *) &crom[0x480000+0x96B9C] = 0x60000000;	// decrementer loop
+	}
 }
 
 // Reverses all aligned 16-bit words, thereby switching their endianness (assumes buffer size is divisible by 2)
@@ -2669,7 +2676,7 @@ CModel3::~CModel3(void)
 #if 0
 	Dump("ram", ram, 0x800000, TRUE, FALSE);
 	//Dump("vrom", vrom, 0x4000000, TRUE, FALSE);
-	//Dump("crom", crom, 0x800000, TRUE, FALSE);
+	Dump("crom", crom, 0x800000, TRUE, FALSE);
 	//Dump("bankedCrom", &crom[0x800000], 0x7000000, TRUE, FALSE);
 	//Dump("soundROM", soundROM, 0x80000, FALSE, TRUE);
 	//Dump("sampleROM", sampleROM, 0x800000, FALSE, TRUE);

Src/Model3/Real3D.cpp

@@ -369,6 +369,8 @@ void CReal3D::WriteTAP(unsigned tck, unsigned tms, unsigned tdi, unsigned trst)
     switch (tapState)
     {
     case 3:     // Capture-DR
+    	//printf("TAP: Capture-DR\n");
+    	//bit = 0;
 
         /*
          * Read ASIC IDs.
@@ -413,7 +415,7 @@ void CReal3D::WriteTAP(unsigned tck, unsigned tms, unsigned tdi, unsigned trst)
         {
             InsertID(0x416C7057, 1 + 0 * 32);
             InsertID(0x416C3057, 1 + 1 * 32);
-            InsertID(0x316C4057, 1 + 2 * 32);
+            InsertID(0x316C4057, 1 + 2 * 32);	// skichamp at PC=A89F4, this value causes "NO DAUGHTER BOARD" message
             InsertID(0x416C5057, 1 + 3 * 32);
             InsertID(0x316C6057, 1 + 4 * 32 + 1);
             InsertID(0x316C6057, 1 + 5 * 32 + 1);
@@ -424,6 +426,7 @@ void CReal3D::WriteTAP(unsigned tck, unsigned tms, unsigned tdi, unsigned trst)
     case 4:     // Shift-DR
 
         tapTDO = Shift(tapID, tapIDSize);
+        //printf("TAP: Shift-DR Bit %d\n", bit++);
         break;
 
     case 10:    // Capture-IR
@@ -448,6 +451,7 @@ void CReal3D::WriteTAP(unsigned tck, unsigned tms, unsigned tdi, unsigned trst)
          */
         tapIR &= 0x3FFFFFFFFFFFULL;
         tapCurrentInstruction = tapIR;
+        //printf("TAP: Update-IR %XLL\n", tapCurrentInstruction);
         break;
 
     default: