From 3d38857b4466d4cef65a0e0af0b0e218b069d2b9 Mon Sep 17 00:00:00 2001
From: luigiblood <luigiblood@gmail.com>
Date: Thu, 24 Nov 2016 03:19:36 +0100
Subject: [PATCH] [BS-X] Make Empty Memory Pack if loaded from Multi Cart menu
 (This is a conscious choice. It means no empty Memory Pack will be made if
 loaded like a regular ROM, which is fine.)

---
 memmap.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/memmap.cpp b/memmap.cpp
index 23659fc6..0ee574d7 100644
--- a/memmap.cpp
+++ b/memmap.cpp
@@ -2002,6 +2002,15 @@ bool8 CMemory::LoadBSCart ()
 
 	CalculatedSize = Multi.cartSizeA;
 
+	if (Multi.cartSizeB == 0 && Multi.cartSizeA <= (MAX_ROM_SIZE - 0x100000))
+	{
+		//Initialize 1MB Empty Memory Pack only if cart B is cleared
+		//It does not make a Memory Pack if game is loaded like a normal ROM
+		Multi.cartOffsetB = CalculatedSize;
+		Multi.cartSizeB = 0x100000;
+		memset(Memory.ROM + Multi.cartOffsetB, 0xFF, 0x100000);
+	}
+
 	return (TRUE);
 }