Add mapper 369 (BMC-N49C-300)

2020-03-07 01:48:36 +08:00
parent 6a805ea424
commit a69354c1c2
5 changed files with 158 additions and 0 deletions
--- a/src/boards/369.c
+++ b/src/boards/369.c
@@ -0,0 +1,153 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020 negativeExponent
+ *
+ * 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
+ */
+
+/* Mapper 369 (BMC-N49C-300) - Super Mario Bros. Party multicart */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static uint8 M40IRQa;
+static uint16 M40IRQCount;
+
+static void M369PW(uint32 A, uint8 V) {
+	switch (EXPREGS[0]) {
+	case 0x00:
+		setprg32(0x8000, 0);
+		break;
+	case 0x01:
+		setprg32(0x8000, 1);
+		break;
+	case 0x13:
+		setprg8(0x6000, 0x0E);
+		setprg8(0x8000, 0x0C);
+		setprg8(0xa000, 0x0D);
+		setprg8(0xc000, EXPREGS[1] | 0x08);
+		setprg8(0xe000, 0x0F);
+		break;
+	case 0x37:
+		setprg8r(0x10, 0x6000, 0);
+		setprg8(A, (V & 0x0F) | 0x10);
+		break;
+	case 0xFF:
+		setprg8r(0x10, 0x6000, 0);
+		setprg8(A, (V & 0x1F) | 0x20);
+		break;
+	}
+}
+
+static void M369CW(uint32 A, uint8 V) {
+	switch (EXPREGS[0]) {
+	case 0x00:
+		setchr8(0);
+		break;
+	case 0x01:
+		setchr8(1);
+		break;
+	case 0x13:
+		setprg8(0xE000, 0xF);
+		setchr8(3);
+		break;
+	case 0x37:
+		setchr1(A, (V & 0x7F) | 0x80);
+		break;
+	case 0xFF:
+		setchr1(A, V | 0x100);
+		break;
+	}
+}
+
+static DECLFW(M369WriteCMD) {
+	EXPREGS[0] = V;
+	FixMMC3PRG(MMC3_cmd);
+	FixMMC3CHR(MMC3_cmd);
+}
+
+static DECLFW(M369Write) {
+	if (EXPREGS[0] == 0x13) {
+		switch (A & 0xE000) {
+		case 0x8000:
+			M40IRQa = 0;
+			M40IRQCount = 0;
+			X6502_IRQEnd(FCEU_IQEXT);
+			break;
+		case 0xA000:
+			M40IRQa = 1;
+			break;
+		case 0xE000:
+			EXPREGS[1] = V & 7;
+			FixMMC3PRG(MMC3_cmd);
+			FixMMC3CHR(MMC3_cmd);
+			break;
+		}
+	} else {
+		if (A < 0xC000) {
+			MMC3_CMDWrite(A, V);
+			FixMMC3PRG(MMC3_cmd);
+			FixMMC3CHR(MMC3_cmd);
+		} else
+			MMC3_IRQWrite(A, V);
+	}
+}
+
+static void M369Power(void) {
+	EXPREGS[0]  = 0x00;
+	EXPREGS[1]  = 0x00;
+	M40IRQa     = 0x00;
+	M40IRQCount = 0x00;
+	GenMMC3Power();
+	SetWriteHandler(0x4120, 0x4120, M369WriteCMD);
+	SetWriteHandler(0x8000, 0xFFFF, M369Write);
+}
+
+static void M369Reset(void) {
+	EXPREGS[0]  = 0x00;
+	EXPREGS[1]  = 0x00;
+	M40IRQa     = 0x00;
+	M40IRQCount = 0x00;
+	MMC3RegReset();
+}
+
+static void FP_FASTAPASS(1) M40IRQHook(int a) {
+   if (EXPREGS[0] == 0x13)
+   {
+	  if (M40IRQa)
+	  {
+		 if (M40IRQCount < 4096)
+			M40IRQCount += a;
+		 else
+		 {
+			M40IRQa = 0;
+			X6502_IRQBegin(FCEU_IQEXT);
+		 }
+	  }
+   }
+}
+
+void Mapper369_Init(CartInfo *info) {
+	GenMMC3_Init(info, 512, 384, 8, 0);
+	pwrap = M369PW;
+	cwrap = M369CW;
+	MapIRQHook = M40IRQHook;
+	info->Power = M369Power;
+	info->Reset = M369Reset;
+	AddExState(EXPREGS, 4, 0, "EXPR");
+	AddExState(&M40IRQa, 1, 0, "M2a");
+	AddExState(&M40IRQCount, 2 | FCEUSTATE_RLSB, 0, "M2CN");
+}