From fd909e14171fb87b19a05b867eeb683bf24b835d Mon Sep 17 00:00:00 2001
From: libretroadmin <reallibretroretroarch@gmail.com>
Date: Sat, 25 May 2024 09:27:13 +0200
Subject: [PATCH] Add mappers 501 and 502

---
 src/boards/501.c | 57 ++++++++++++++++++++++++++++++++++++++++
 src/boards/502.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  2 ++
 src/ines.h       |  2 ++
 4 files changed, 128 insertions(+)
 create mode 100644 src/boards/501.c
 create mode 100644 src/boards/502.c

diff --git a/src/boards/501.c b/src/boards/501.c
new file mode 100644
index 0000000..0a49c3b
--- /dev/null
+++ b/src/boards/501.c
@@ -0,0 +1,57 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2023
+ *
+ * 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 "latch.h"
+
+static uint8 reg[2];
+
+static SFORMAT StateRegs[] = {
+    { reg, 2, "REGS" },
+    { 0 }
+};
+
+static void Sync(void) {
+	setprg4(0x7000, 0);
+	setprg32(0x8000, (reg[0] << 2) + (latch.data & 7));
+	setchr8(0);
+	setmirror(MI_0 + (reg[1] & 1));
+}
+
+static DECLFW(M501WriteReg) {
+	if (~reg[1] & 0x80) {
+		reg[A & 1] = V;
+		Sync();
+	}
+}
+
+static void M501Power() {
+    reg[0] = reg[1] = 0;
+	LatchPower();
+	SetReadHandler(0x7000, 0x7FFF, CartBR);
+    SetWriteHandler(0x6000, 0x6FFF, M501WriteReg);
+}
+
+void Mapper501_Init(CartInfo *info) {
+	Latch_Init(info, Sync, NULL, 0, 0);
+	info->Power = M501Power;
+    AddExState(StateRegs, ~0, 0, NULL);
+}
diff --git a/src/boards/502.c b/src/boards/502.c
new file mode 100644
index 0000000..8f23de2
--- /dev/null
+++ b/src/boards/502.c
@@ -0,0 +1,67 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2023
+ *
+ * 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 "latch.h"
+
+static uint8 reg[2];
+
+static SFORMAT StateRegs[] = {
+    { reg, 2, "REGS" },
+    { 0 }
+};
+
+static void Sync(void) {
+	uint8 mask = (8 << (reg[1] >> 4 & 3)) - 1;
+	setprg4(0x7000, 0);
+	if (reg[1] & 6)
+		setprg32(0x8000, (reg[0] << 2) + (latch.data & (mask >> 1)));
+	else {
+		setprg16(0x8000, (reg[0] << 3) + (latch.data & mask));
+		setprg16(0xC000, (reg[0] << 3) + mask);
+	}
+	setchr8(0);
+    if (reg[1] & 2) {
+        setmirror(MI_0 + (latch.data >> 4) & 1);
+    } else {
+	    setmirror(reg[1] & 1);
+    }
+}
+
+static DECLFW(M502WriteReg) {
+	if (~reg[1] & 0x80) {
+		reg[A & 1] = V;
+		Sync();
+	}
+}
+
+static void M502Power() {
+    reg[0] = reg[1] = 0;
+	LatchPower();
+	SetReadHandler(0x7000, 0x7FFF, CartBR);
+    SetWriteHandler(0x6000, 0x6FFF, M502WriteReg);
+}
+
+void Mapper502_Init(CartInfo *info) {
+	Latch_Init(info, Sync, NULL, 0, 0);
+	info->Power = M502Power;
+    AddExState(StateRegs, ~0, 0, NULL);
+}
diff --git a/src/ines.c b/src/ines.c
index 484c85f..2cd9219 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -835,6 +835,8 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "47-2",                 	467, Mapper467_Init         )
 	INES_BOARD( "BlazePro CPLD",           	468, Mapper468_Init         )
 	INES_BOARD( "Yhc-000",                  500, Mapper500_Init         )
+	INES_BOARD( "Yhc-001",                  501, Mapper501_Init         )
+	INES_BOARD( "Yhc-002",                  502, Mapper502_Init         )
 	INES_BOARD( "SA-9602B",                 513, SA9602B_Init           )
 	INES_BOARD( "Brilliant Com Cocoma Pack", 516, Mapper516_Init        )
 	INES_BOARD( "DANCE2000",                518, UNLD2000_Init          )
diff --git a/src/ines.h b/src/ines.h
index 54a9840..7901730 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -344,6 +344,8 @@ void Mapper466_Init(CartInfo *);
 void Mapper467_Init(CartInfo *);
 void Mapper468_Init(CartInfo *);
 void Mapper500_Init(CartInfo *);
+void Mapper501_Init(CartInfo *);
+void Mapper502_Init(CartInfo *);
 void Mapper516_Init(CartInfo *);
 void Mapper523_Init(CartInfo *);
 void Mapper533_Init(CartInfo *);