From c23a5c7b5fb70f06820e680a18d3d44942b1b6d7 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Thu, 10 Apr 2025 18:35:30 +0200
Subject: [PATCH] Add mapper 559.

---
 src/boards/530.c |  1 -
 src/boards/559.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 4 files changed, 73 insertions(+), 1 deletion(-)
 create mode 100644 src/boards/559.c

diff --git a/src/boards/530.c b/src/boards/530.c
index eaf6d44..2f7dcd6 100644
--- a/src/boards/530.c
+++ b/src/boards/530.c
@@ -41,7 +41,6 @@ DECLFW(UNLAX5705_unscrambleAddress) {
 	VRC24_writeReg(A &~0x1000 | A <<9 &0x1000, V);
 }
 
-
 void UNLAX5705_power (void) {
 	VRC24_power();
 	SetWriteHandler(0x8000, 0xFFFF, UNLAX5705_unscrambleAddress);
diff --git a/src/boards/559.c b/src/boards/559.c
new file mode 100644
index 0000000..a9a2c15
--- /dev/null
+++ b/src/boards/559.c
@@ -0,0 +1,71 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 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"
+#include "vrc2and4.h"
+
+static uint8 nt[4];
+static uint8 prg;
+
+static SFORMAT stateRegs[] ={
+        { nt, 4, "EXPN" },
+	{ &prg, 1, "PRGC" },
+        { 0 }
+};
+
+static void sync () {
+	int bank;
+	VRC24_syncWRAM(0);
+	VRC24_syncPRG(0x01F, 0x000);
+	VRC24_syncCHR(0x1FF, 0x000);
+	setmirrorw(nt[0] &1, nt[1] &1, nt[2] &1, nt[3] &1);
+}
+
+int Mapper559_getPRGBank(int bank) {
+	return bank ==2? prg: VRC24_getPRGBank(bank);
+}
+
+DECLFW(Mapper559_externalSelect) {
+	if (A &4)
+		nt[A &3] =V;
+	else
+		prg =V;
+	VRC24_Sync();
+}
+
+DECLFW(Mapper559_nibblizeData) {
+	VRC24_writeReg(A, V >>(A &0x400? 4: 0));
+}
+
+void Mapper559_power (void) {
+	nt[0] =nt[1] =0xE0;
+	nt[2] =nt[3] =0xE1;
+	prg =0xFE;
+	VRC24_power();
+	SetWriteHandler(0xB000, 0xFFFF, Mapper559_nibblizeData);
+}
+
+void Mapper559_Init (CartInfo *info) {
+	VRC24_init(info, sync, 0x400, 0x800, 1, 1, 0);
+	info->Power =Mapper559_power;
+	VRC24_GetPRGBank =Mapper559_getPRGBank;
+	VRC24_ExternalSelect =Mapper559_externalSelect;
+	AddExState(stateRegs, ~0, 0, 0);
+}
diff --git a/src/ines.c b/src/ines.c
index c43f580..e871870 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -895,6 +895,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "JY-215",                   556, Mapper556_Init         )
 	INES_BOARD( "",                         550, Mapper550_Init         )
 	INES_BOARD( "YC-03-09",                 558, Mapper558_Init         )
+	INES_BOARD( "Subor Sango II",           559, Mapper559_Init         )
 INES_BOARD_END()
 
 static uint32 iNES_get_mapper_id(void)
diff --git a/src/ines.h b/src/ines.h
index 36550cd..e737994 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -393,5 +393,6 @@ void Mapper554_Init(CartInfo *);
 void Mapper555_Init(CartInfo *);
 void Mapper556_Init(CartInfo *);
 void Mapper558_Init(CartInfo *);
+void Mapper559_Init(CartInfo *);
 
 #endif