mapper cleanups (#494)

* m215: Fix support for submapper 1 cart

* Switch UNL43272 to new Mapper242 implementation

* Merge mappers BMC-70in1/B and 236

* Merge 58/213/GK-192

* Assign GS-2004/GS-2014 to mapper 283

* Cleanup

Co-authored-by: negativeExponent <negativeExponent@users.noreply.github.com>

src/boards/283.c

@@ -0,0 +1,64 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2007 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"
+#include "../ines.h"
+
+static uint8 reg, mirr;
+static SFORMAT StateRegs[] =
+{
+	{ &reg, 1, "REGS" },
+	{ &mirr, 1, "MIRR" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setprg8(0x6000, (ROM_size == 17) ? 32 : 31); /* FIXME: Verify these */
+	setprg32(0x8000, reg);
+	setchr8(0);
+}
+
+static DECLFW(M283Write) {
+	reg = V;
+	Sync();
+}
+
+static void M283Power(void) {
+	reg = 0;
+	Sync();
+	SetReadHandler(0x6000, 0x7FFF, CartBR);
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, M283Write);
+}
+
+static void M283Reset(void) {
+	reg = 0;
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper283_Init(CartInfo *info) {
+	info->Reset = M283Reset;
+	info->Power = M283Power;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}