Mapper 319: Use hp898f.c only for the old incorrect UNIF bank order, and 319.c for all NES 2.0 ROMs. Add CNROM mode and solder pad switch to the latter.

2021-11-14 17:01:55 +01:00
parent e12a40c2f4
commit ea17977c20
5 changed files with 102 additions and 44 deletions
--- a/src/boards/319.c
+++ b/src/boards/319.c
@@ -0,0 +1,86 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2005 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 latch;
+static uint8 pad;
+
+static SFORMAT StateRegs[] =
+{
+	{ reg, 2, "REG" },
+	{ &latch, 1, "LATC" },
+	{ &pad, 1, "PAD" },
+	{ 0 }
+};
+
+static void M319Sync (void) {
+	if (reg[1] &0x40)
+		setprg32(0x8000, reg[1] >>3 &3);
+	else
+	{
+		setprg16(0x8000, reg[1] >>2 &6 | reg[1] >>5 &1);
+		setprg16(0xC000, reg[1] >>2 &6 | reg[1] >>5 &1);
+	}
+	setchr8(reg[0] >>4 &~(reg[0] <<2 &4) | latch <<2 &(reg[0] <<2 &4));
+	setmirror(reg[1] >>7);
+}
+
+static void StateRestore(int version) {
+	M319Sync();
+}
+
+static DECLFR(M319ReadPad) {
+	return pad;
+}
+
+static DECLFW(M319WriteReg) {
+	reg[A >>2 &1] =V;
+	M319Sync();
+}
+
+static DECLFW(M319WriteLatch) {
+	latch =V;
+	M319Sync();
+}
+
+static void M319Reset(void) {
+	reg[0] =reg[1] =latch =0;
+	pad ^=0x40;
+	M319Sync();
+}
+
+static void M319Power(void) {
+	reg[0] =reg[1] =latch =pad =0;
+	M319Sync();
+	SetReadHandler(0x5000, 0x5FFF, M319ReadPad);
+	SetReadHandler(0x6000, 0xFFFF, CartBR);
+	SetWriteHandler(0x6000, 0x7FFF, M319WriteReg);
+	SetWriteHandler(0x8000, 0xFFFF, M319WriteLatch);
+}
+
+void Mapper319_Init(CartInfo *info) {
+	info->Power = M319Power;
+	info->Reset = M319Reset;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}