Initial commit - http://sourceforge.net/p/fceumm/code/160/

2014-03-30 22:15:17 +02:00
commit 7e6caac57d
370 changed files with 90364 additions and 0 deletions
--- a/src/boards/vrc3.c
+++ b/src/boards/vrc3.c
@@ -0,0 +1,133 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2012 CaH4e3
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * VRC-3
+ *
+ */
+
+#include "mapinc.h"
+
+static uint8 preg;
+static uint8 IRQx;	//autoenable
+static uint8 IRQm;	//mode
+static uint8 IRQa;
+static uint16 IRQReload, IRQCount;
+static uint8 *WRAM = NULL;
+static uint32 WRAMSIZE;
+
+static SFORMAT StateRegs[] =
+{
+	{ &preg, 1, "PREG" },
+	{ &IRQa, 1, "IRQA" },
+	{ &IRQx, 1, "IRQX" },
+	{ &IRQm, 1, "IRQM" },
+	{ &IRQReload, 2, "IRQR" },
+	{ &IRQCount, 2, "IRQC" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setprg8r(0x10, 0x6000, 0);
+	setprg16(0x8000, preg);
+	setprg16(0xC000, ~0);
+	setchr8(0);
+}
+
+static DECLFW(M73Write) {
+	switch (A & 0xF000) {
+	case 0x8000: IRQReload &= 0xFFF0; IRQReload |= (V & 0xF) << 0;  break;
+	case 0x9000: IRQReload &= 0xFF0F; IRQReload |= (V & 0xF) << 4;  break;
+	case 0xA000: IRQReload &= 0xF0FF; IRQReload |= (V & 0xF) << 8;  break;
+	case 0xB000: IRQReload &= 0x0FFF; IRQReload |= (V & 0xF) << 12; break;
+	case 0xC000:
+		IRQm = V & 4;
+		IRQx = V & 1;
+		IRQa = V & 2;
+		if (IRQa) {
+			if (IRQm) {
+				IRQCount &= 0xFFFF;
+				IRQCount |= (IRQReload & 0xFF);
+			} else
+				IRQCount = IRQReload;
+		}
+		X6502_IRQEnd(FCEU_IQEXT);
+		break;
+	case 0xD000: X6502_IRQEnd(FCEU_IQEXT); IRQa = IRQx; break;
+	case 0xF000: preg = V; Sync(); break;
+	}
+}
+
+static void M73IRQHook(int a) {
+	uint32 i;
+	if (!IRQa) return;
+	for (i = 0; i < a; i++) {
+		if (IRQm) {
+			uint16 temp = IRQCount;
+			temp &= 0xFF;
+			IRQCount &= 0xFF00;
+			if (temp == 0xFF) {
+				IRQCount = IRQReload;
+				IRQCount |= (uint16)(IRQReload & 0xFF);
+				X6502_IRQBegin(FCEU_IQEXT);
+			} else {
+				temp++;
+				IRQCount |= temp;
+			}
+		} else {
+			//16 bit mode
+			if (IRQCount == 0xFFFF) {
+				IRQCount = IRQReload;
+				X6502_IRQBegin(FCEU_IQEXT);
+			} else
+				IRQCount++;
+		}
+	}
+}
+
+static void M73Power(void) {
+	IRQReload = IRQm = IRQx = 0;
+	Sync();
+	SetReadHandler(0x6000, 0xFFFF, CartBR);
+	SetWriteHandler(0x6000, 0x7FFF, CartBW);
+	SetWriteHandler(0x8000, 0xFFFF, M73Write);
+}
+
+static void M73Close(void) {
+	if (WRAM)
+		FCEU_gfree(WRAM);
+	WRAM = NULL;
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper73_Init(CartInfo *info) {
+	info->Power = M73Power;
+	info->Close = M73Close;
+	MapIRQHook = M73IRQHook;
+
+	WRAMSIZE = 8192;
+	WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
+	SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
+	AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+
+	AddExState(&StateRegs, ~0, 0, 0);
+	GameStateRestore = StateRestore;
+}