From f8d791b46575a3cba347dd1a2e0b8142e5ffd3c2 Mon Sep 17 00:00:00 2001
From: rainwarrior <rainwarrior@users.sf.net>
Date: Wed, 31 Aug 2016 06:11:03 +0000
Subject: [PATCH] forgot to submit boards/cheapocabra.cpp

---
 trunk/src/boards/cheapocabra.cpp | 92 ++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 trunk/src/boards/cheapocabra.cpp

diff --git a/trunk/src/boards/cheapocabra.cpp b/trunk/src/boards/cheapocabra.cpp
new file mode 100644
index 00000000..3c41db46
--- /dev/null
+++ b/trunk/src/boards/cheapocabra.cpp
@@ -0,0 +1,92 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2002 Xodnizel
+ *
+ * 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 111 - Cheapocabra board by Memblers
+// http://forums.nesdev.com/viewtopic.php?p=146039
+//
+// 512k PRG-ROM in 32k pages
+// 32k CHR-ROM used as:
+//     2 x 8k pattern pages
+//     2 x 8k nametable pages
+//
+// Notes:
+// - PRG-ROM is actually flash RAM. Self-flashing should be implemented if battery backed.
+// - CHR-RAM for nametables maps to $3000-3FFF as well, but FCEUX internally limits to 4k?
+
+#include "mapinc.h"
+
+static uint8 reg;
+static uint8 *CHRRAM = NULL;
+static uint32 CHRRAMSIZE;
+
+static SFORMAT StateRegs[] =
+{
+	{ &reg, 1, "REG" },
+	{ 0 }
+};
+
+static void Sync(void) {
+
+	// bit 7 controls green LED
+	// bit 6 controls red LED
+	int nt  = (reg & 0x20) ? 8192 : 0; // bit 5 controls 8k nametable page
+	int chr = (reg & 0x10) ? 1 : 0; // bit 4 selects 8k CHR page
+	int prg = (reg & 0x0F); // bits 0-3 select 32k PRG page
+
+	nt += (16 * 1024);
+	for (int n=0; n<4; ++n)
+	{
+		setntamem(CHRRAM + nt + (1024 * n),1,n);
+	}
+	setchr8r(0x10, chr);
+	setprg32(0x8000,prg);
+}
+
+static DECLFW(M111Write) {
+	if ((A >= 0x5000 && A <= 0x5FFF) || (A >= 0x7000 && A <= 0x7FFF))
+	{
+		reg = V;
+		Sync();
+	}
+}
+
+static void M111Power(void) {
+	reg = 0xFF;
+	Sync();
+	SetReadHandler(0x8000, 0xffff, CartBR);
+	SetWriteHandler(0x5000, 0x5fff, M111Write);
+	SetWriteHandler(0x7000, 0x7fff, M111Write);
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper111_Init(CartInfo *info) {
+	info->Power = M111Power;
+
+	CHRRAMSIZE = 1024 * 32;
+	CHRRAM = (uint8*)FCEU_gmalloc(CHRRAMSIZE);
+	SetupCartCHRMapping(0x10, CHRRAM, CHRRAMSIZE, 1);
+
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+	AddExState(CHRRAM, CHRRAMSIZE, 0, "CRAM");
+}