From bedeeebac7a5c990935383882a132004ed174ba3 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Sat, 5 Apr 2025 22:15:36 +0200
Subject: [PATCH] Added mapper 462.

---
 src/boards/datalatch.c | 40 ++++++++++++++++++++++++++++++++++++++++
 src/ines.c             |  1 +
 src/ines.h             |  1 +
 3 files changed, 42 insertions(+)

diff --git a/src/boards/datalatch.c b/src/boards/datalatch.c
index 4cb03db..59aa9ff 100644
--- a/src/boards/datalatch.c
+++ b/src/boards/datalatch.c
@@ -649,6 +649,46 @@ void Mapper415_Init(CartInfo *info) {
 	info->Power = M415Power;
 }
 
+/*------------------ Mapper 462 ---------------------------*/
+static uint8 M462OuterBank;
+
+static void Mapper462_Sync(void) {
+	if (M462OuterBank &0x40) {
+		setprg32(0x8000, latche &7 | M462OuterBank >>3 &~7);
+		setmirror(latche &0x10? MI_1: MI_0);
+	} else {
+		setprg16(0x8000, latche &7 |  M462OuterBank >>2 &~7);
+		setprg16(0xC000,         7 |  M462OuterBank >>2 &~7);
+		setmirror(M462OuterBank &0x10? MI_V: MI_H);
+	}	
+	setchr8(0);
+}
+
+static DECLFW(M462_WriteExtra) {
+	M462OuterBank =V;
+	Mapper462_Sync();
+}
+
+static void M462Power(void) {
+	M462OuterBank =0;
+	LatchPower();
+	SetWriteHandler(0xA000, 0xBFFF, M462_WriteExtra);
+}
+
+static void M462Reset(void) {
+	M462OuterBank =0;
+	Mapper462_Sync();
+}
+
+void Mapper462_Init(CartInfo *info) {
+	Latch_Init(info, Mapper462_Sync, 0, 0x8000, 0xFFFF, 0, 0);
+	info->Power = M462Power;
+	info->Reset = M462Reset;
+	AddExState(&M462OuterBank, 1, 0, "EXP0");
+}
+
+/*------------------ Mapper 481 ---------------------------*/
+
 static void Mapper481_Sync(void) {
 	setprg16(0x8000, latche >>4 &~7 | latche &7);
 	setprg16(0xc000, latche >>4     |         7);
diff --git a/src/ines.c b/src/ines.c
index b569472..5d3efbe 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -845,6 +845,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "8-in-1",                   459, Mapper459_Init         )
 	INES_BOARD( "FC-29-40/K-3101",        	460, Mapper460_Init         )
 	INES_BOARD( "0324",                 	461, Mapper461_Init         )
+	INES_BOARD( "BMC-971107-00G",        	462, Mapper462_Init         )
 	INES_BOARD( "YH810X1",                 	463, Mapper463_Init         )
 	INES_BOARD( "NTDEC 9012",          	464, Mapper464_Init         )
 	INES_BOARD( "ET-120",                 	465, Mapper465_Init         )
diff --git a/src/ines.h b/src/ines.h
index 96df832..3cda126 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -356,6 +356,7 @@ void Mapper458_Init(CartInfo *);
 void Mapper459_Init(CartInfo *);
 void Mapper460_Init(CartInfo *);
 void Mapper461_Init(CartInfo *);
+void Mapper462_Init(CartInfo *);
 void Mapper463_Init(CartInfo *);
 void Mapper464_Init(CartInfo *);
 void Mapper465_Init(CartInfo *);