start moving everything to C

1 files changed, 204 insertions, 0 deletions

diff --git a/source/obc1.c b/source/obc1.c
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--- /dev/null
+++ b/source/obc1.c
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+/****************************************************
+  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+ 
+  (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
+                            Jerremy Koot (jkoot@snes9x.com)
+
+  (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)
+
+  (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
+                            funkyass (funkyass@spam.shaw.ca),
+                            Joel Yliluoma (http://iki.fi/bisqwit/)
+                            Kris Bleakley (codeviolation@hotmail.com),
+                            Matthew Kendora,
+                            Nach (n-a-c-h@users.sourceforge.net),
+                            Peter Bortas (peter@bortas.org) and
+                            zones (kasumitokoduck@yahoo.com)
+
+  C4 x86 assembler and some C emulation code
+  (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
+                            _Demo_ (_demo_@zsnes.com), and Nach
+
+  C4 C++ code
+  (c) Copyright 2003 Brad Jorsch
+
+  DSP-1 emulator code
+  (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
+                            John Weidman, neviksti (neviksti@hotmail.com),
+                            Kris Bleakley, Andreas Naive
+
+  DSP-2 emulator code
+  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
+                     Lord Nightmare (lord_nightmare@users.sourceforge.net
+
+  OBC1 emulator code
+  (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
+                            Kris Bleakley
+  Ported from x86 assembler to C by sanmaiwashi
+
+  SPC7110 and RTC C++ emulator code
+  (c) Copyright 2002 Matthew Kendora with research by
+                     zsKnight, John Weidman, and Dark Force
+
+  S-DD1 C emulator code
+  (c) Copyright 2003 Brad Jorsch with research by
+                     Andreas Naive and John Weidman
+ 
+  S-RTC C emulator code
+  (c) Copyright 2001 John Weidman
+  
+  ST010 C++ emulator code
+  (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
+
+  Super FX x86 assembler emulator code 
+  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 
+
+  Super FX C emulator code 
+  (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
+
+
+  SH assembler code partly based on x86 assembler code
+  (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) 
+
+ 
+  Specific ports contains the works of other authors. See headers in
+  individual files.
+ 
+  Snes9x homepage: http://www.snes9x.com
+ 
+  Permission to use, copy, modify and distribute Snes9x in both binary and
+  source form, for non-commercial purposes, is hereby granted without fee,
+  providing that this license information and copyright notice appear with
+  all copies and any derived work.
+ 
+  This software is provided 'as-is', without any express or implied
+  warranty. In no event shall the authors be held liable for any damages
+  arising from the use of this software.
+ 
+  Snes9x is freeware for PERSONAL USE only. Commercial users should
+  seek permission of the copyright holders first. Commercial use includes
+  charging money for Snes9x or software derived from Snes9x.
+ 
+  The copyright holders request that bug fixes and improvements to the code
+  should be forwarded to them so everyone can benefit from the modifications
+  in future versions.
+ 
+  Super NES and Super Nintendo Entertainment System are trademarks of
+  Nintendo Co., Limited and its subsidiary companies.
+*******************************************************************************/
+#include <string.h>
+#include "memmap.h"
+#include "obc1.h"
+
+static uint8 *OBC1_RAM = NULL;
+
+int OBC1_Address;
+int OBC1_BasePtr;
+int OBC1_Shift;
+
+extern "C"
+{
+uint8 GetOBC1 (uint16 Address)
+{
+	switch(Address) {
+		case 0x7ff0:
+			return OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2)];
+		
+		case 0x7ff1:
+			return OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2) + 1];
+		
+		case 0x7ff2:
+			return OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2) + 2];
+		
+		case 0x7ff3:
+			return OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2) + 3];
+		
+		case 0x7ff4:
+			return OBC1_RAM[OBC1_BasePtr + (OBC1_Address >> 2) + 0x200];	
+	}
+
+	return OBC1_RAM[Address & 0x1fff];
+}
+
+void SetOBC1 (uint8 Byte, uint16 Address)
+{
+	switch(Address) {
+		case 0x7ff0:
+		{
+			OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2)] = Byte;
+			break;
+		}
+		
+		case 0x7ff1:
+		{
+			OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2) + 1] = Byte;
+			break;
+		}
+		
+		case 0x7ff2:
+		{
+			OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2) + 2] = Byte;
+			break;
+		}
+		
+		case 0x7ff3:
+		{
+			OBC1_RAM[OBC1_BasePtr + (OBC1_Address << 2) + 3] = Byte;
+			break;
+		}
+		
+		case 0x7ff4:
+		{
+			unsigned char Temp;
+
+			Temp = OBC1_RAM[OBC1_BasePtr + (OBC1_Address >> 2) + 0x200];
+			Temp = (Temp & ~(3 << OBC1_Shift)) | ((Byte & 3) << OBC1_Shift);	
+			OBC1_RAM[OBC1_BasePtr + (OBC1_Address >> 2) + 0x200] = Temp;
+			break;
+		}
+		
+		case 0x7ff5:
+		{
+			if (Byte & 1) 
+				OBC1_BasePtr = 0x1800;
+			else 
+				OBC1_BasePtr = 0x1c00;			
+
+			OBC1_RAM[0x1ff5] = Byte;
+			break;
+		}
+		
+		case 0x7ff6:
+		{
+			OBC1_Address = Byte & 0x7f;	
+			OBC1_Shift = (Byte & 3) << 1;	
+			break;
+		}	
+		
+		default:
+			OBC1_RAM[Address & 0x1fff] = Byte;
+			break;
+	}
+}
+
+uint8 *GetBasePointerOBC1(uint32 Address)
+{
+	return Memory.FillRAM;
+}
+
+uint8 *GetMemPointerOBC1(uint32 Address)
+{
+	return (Memory.FillRAM + (Address & 0xffff));
+}
+
+void ResetOBC1()
+{
+	OBC1_Address = 0;
+    OBC1_BasePtr = 0x1c00;
+    OBC1_Shift = 0;
+	OBC1_RAM = &Memory.FillRAM[0x6000];
+
+	memset(OBC1_RAM, 0x00, 0x2000);
+}
+
+}