From ae328389b311496a3bcdb6431c220d98abcbf867 Mon Sep 17 00:00:00 2001
From: Ignacio Sanchez Gines <863613+drhelius@users.noreply.github.com>
Date: Thu, 28 Dec 2023 22:33:56 +0100
Subject: [PATCH] Activision Cart support. Fixes #45

---
 platforms/desktop-shared/emu.cpp |  3 +++
 src/Memory_inline.h              | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/platforms/desktop-shared/emu.cpp b/platforms/desktop-shared/emu.cpp
index 80a039b..9ae2393 100644
--- a/platforms/desktop-shared/emu.cpp
+++ b/platforms/desktop-shared/emu.cpp
@@ -358,6 +358,9 @@ static const char* get_mapper(Cartridge::CartridgeTypes type)
     case Cartridge::CartridgeMegaCart:
         return "MegaCart";
         break;
+    case Cartridge::CartridgeActivisionCart:
+        return "Activision";
+        break;
     case Cartridge::CartridgeNotSupported:
         return "Not Supported";
         break;
diff --git a/src/Memory_inline.h b/src/Memory_inline.h
index ae163de..426bd29 100644
--- a/src/Memory_inline.h
+++ b/src/Memory_inline.h
@@ -67,6 +67,21 @@ inline u8 Memory::Read(u16 address)
                     return pRom[(address & 0x3FFF) + m_RomBankAddress];
                 }
             }
+            else if (m_pCartridge->GetType() == Cartridge::CartridgeActivisionCart)
+            {
+                if (address < 0xC000)
+                {
+                    return pRom[address & 0x3FFF];
+                }
+                else
+                {
+                    if (address >= 0xFF80)
+                    {
+                        Log("--> ** EEPROM read: %X %X", address);
+                    }
+                    return pRom[(address & 0x3FFF) + m_RomBankAddress];
+                }
+            }
             else
             {
                 if (address >= (romSize + 0x8000))
@@ -131,6 +146,23 @@ inline void Memory::Write(u16 address, u8 value)
                 m_RomBank = address & (m_pCartridge->GetROMBankCount() - 1);
                 m_RomBankAddress = m_RomBank << 14;
             }
+            else if ((m_pCartridge->GetType() == Cartridge::CartridgeActivisionCart) && (address >= 0xFF90))
+            {
+                if ((address == 0xFF90) || (address == 0xFFA0) || (address == 0xFFB0))
+                {
+                    m_RomBank = (address >> 4) & (m_pCartridge->GetROMBankCount() - 1);
+                    m_RomBankAddress = m_RomBank << 14;
+                }
+
+                if (address == 0xFFC0)
+                    Log("--> ** EEPROM write SCL=0: %X %X", address, value);
+                if (address == 0xFFD0)
+                    Log("--> ** EEPROM write SCL=1: %X %X", address, value);
+                if (address == 0xFFE0)
+                    Log("--> ** EEPROM write SDA=0: %X %X", address, value);
+                if (address == 0xFFF0)
+                    Log("--> ** EEPROM write SDA=1: %X %X", address, value);
+            }
             else
             {
                 Log("--> ** Attempting to write on ROM: %X %X", address, value);