From be35d352ac2523c38e0f59d00f3af513c97c4b58 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Tue, 1 Apr 2025 14:45:39 +0200
Subject: [PATCH] Added mapper 487.

---
 src/boards/487.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 90 insertions(+)
 create mode 100644 src/boards/487.c

diff --git a/src/boards/487.c b/src/boards/487.c
new file mode 100644
index 0000000..ca056f3
--- /dev/null
+++ b/src/boards/487.c
@@ -0,0 +1,88 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file: 2025 NewRisingSun
+ *
+ * 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 SFORMAT StateRegs[] ={
+	{ reg, 2, "REGS" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	int prg =(reg[1] &0x40? (reg[0] >>3 &1): (reg[1] &0x01)) |
+		  reg[1] &0x3E;
+	int chr = reg[0] &0x03 |
+		 (reg[1] &0x40? (reg[0] &0x04): (reg[1] <<2 &4)) |
+		  reg[1] <<2 &0xF8;
+	if (prg &0x30) prg -=0x10; /* The register layout assumes a 2 MiB address space. The first ROM chip is only 512 KiB though, and the .NES file is not padded or repeated to fill those 2 MiB. */
+	if (chr &0xC0) chr -=0x40; /* Therefore, subtract 512 KiB from the PRG and CHR outer bank if anything after the first 512 KiB is selected. */
+	setprg32(0x8000, prg);
+	setchr8(chr);
+	setmirror(reg[1] &0x80? MI_H: MI_V);
+}
+
+static DECLFW(WriteNINA) {
+	if (A &0x100) {
+		if (A &0x080) /* Second register is always writable */
+			reg[1] =V; 
+		else
+		if (~reg[1] &0x20) /* First register is only writable in NINA-03 mode */
+			reg[0] =V;
+		Sync();
+	}
+	Sync();
+}
+
+static DECLFW(WriteColorDreams) {
+	if (reg[1] &0x20) { /* Only writable in Color Dreams mode. Translate to NINA-03 register arrangement */
+		reg[0] =V <<3 &8 | V >>4 &7;
+		Sync();
+	}
+}
+
+static void Power(void) {
+	reg[0] = 0;
+	reg[1] = 0;
+	Sync();
+	SetWriteHandler(0x8000, 0xFFFF, WriteColorDreams);
+	SetWriteHandler(0x4100, 0x7FFF, WriteNINA);
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+static void Reset(void) {
+	reg[0] = 0;
+	reg[1] = 0;
+	Sync();
+}
+
+void Mapper487_Init(CartInfo *info) {
+	info->Power = Power;
+	info->Reset = Reset;
+	AddExState(&StateRegs, ~0, 0, 0);
+	GameStateRestore = StateRestore;
+}
+
diff --git a/src/ines.c b/src/ines.c
index 4e5b287..54839c8 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -847,6 +847,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "BlazePro CPLD",           	468, Mapper468_Init         )
 	INES_BOARD( "INX_007T_V01",		470, INX_007T_Init          )
 	INES_BOARD( "045N",          		481, Mapper481_Init         )
+	INES_BOARD( "AVE NINA-08",    		487, Mapper487_Init         )
 	INES_BOARD( "Yhc-000",                  500, Mapper500_Init         )
 	INES_BOARD( "Yhc-001",                  501, Mapper501_Init         )
 	INES_BOARD( "Yhc-002",                  502, Mapper502_Init         )
diff --git a/src/ines.h b/src/ines.h
index 6f75f1d..6c4754f 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -358,6 +358,7 @@ void Mapper467_Init(CartInfo *);
 void Mapper468_Init(CartInfo *);
 void INX_007T_Init(CartInfo* info); /* Mapper 470 */
 void Mapper481_Init(CartInfo *);
+void Mapper487_Init(CartInfo *);
 void Mapper500_Init(CartInfo *);
 void Mapper501_Init(CartInfo *);
 void Mapper502_Init(CartInfo *);