Add mapper 236

2021-09-21 22:21:44 +02:00
parent afe2b4d965
commit 21c829ba43
2 changed files with 100 additions and 1 deletions
--- a/src/boards/236.c
+++ b/src/boards/236.c
@@ -0,0 +1,99 @@
+/* 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
+ */
+
+#include "mapinc.h"
+
+static uint8 reg[2];
+static uint8 dip;
+static SFORMAT StateRegs[] =
+{
+	{ reg,  2, "REG " },
+	{ &dip, 1, "DIP " },
+	{ 0 }
+};
+
+static void Sync(void)
+{
+	int prg = reg[1] &7 | reg[0] <<3;
+	switch (reg[1] >>4 &3)
+	{
+		case 0:
+		case 1:
+			setprg16(0x8000, prg);
+			setprg16(0xC000, prg |7);
+			break;
+		case 2:
+			setprg32(0x8000, prg >>1);
+			break;
+		case 3:
+			setprg16(0x8000, prg);
+			setprg16(0xC000, prg);
+			break;
+	}
+	setchr8(reg[0] &7);
+	setmirror((reg[0] >>5 &1) ^1);
+}
+
+
+static DECLFR(M236Read)
+{
+	if ((reg[1] >>4 &3) ==1)
+		return CartBR(A &~0xF | dip);
+	else
+		return CartBR(A);
+}
+
+static DECLFW(M236WriteReg)
+{
+	reg[A >>14 &1] =A &0xFF;
+	Sync();
+}
+
+static void M236Power(void)
+{
+	dip = 0;
+	reg[0] = 0;
+	reg[1] = 0;
+	Sync();
+	SetWriteHandler(0x8000, 0xFFFF, M236WriteReg);
+	SetReadHandler(0x8000, 0xFFFF, M236Read);
+}
+
+static void M236Reset(void)
+{
+	++dip;
+	/* Soft-reset returns to menu */
+	reg[0] = 0;
+	reg[1] = 0;
+	Sync();
+}
+
+static void StateRestore(int version)
+{
+	Sync();
+}
+
+void Mapper236_Init(CartInfo *info)
+{
+	info->Power = M236Power;
+	info->Reset = M236Reset;
+	AddExState(&StateRegs, ~0, 0, 0);
+	GameStateRestore = StateRestore;
+}
--- a/src/ines.c
+++ b/src/ines.c
@@ -655,7 +655,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "BMC 22+20-in-1 RST",       233, Mapper233_Init         )
 	INES_BOARD( "BMC MAXI",                 234, Mapper234_Init         )
 	INES_BOARD( "Golden Game",              235, Mapper235_Init         )
-/*    INES_BOARD( "",                            236, Mapper236_Init ) */
+	INES_BOARD( "Realtec 8155",             236, Mapper236_Init         )
 	INES_BOARD( "Teletubbies / Y2K",        237, Mapper237_Init         )
 	INES_BOARD( "UNL6035052",               238, UNL6035052_Init        )
 /*    INES_BOARD( "",                            239, Mapper239_Init ) */