From c406f0708f25704ee041d4b132f08122a9dc83b7 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Wed, 2 Dec 2020 22:50:36 +1000
Subject: [PATCH] Cheats: Implement C0 command (activate codes iff equal)

---
 src/core/cheats.cpp | 10 ++++++++++
 src/core/cheats.h   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/src/core/cheats.cpp b/src/core/cheats.cpp
index fe77448ad..628d9b1eb 100644
--- a/src/core/cheats.cpp
+++ b/src/core/cheats.cpp
@@ -921,6 +921,16 @@ void CheatCode::Apply() const
       }
       break;
 
+      case InstructionCode::ExitIfNotEqual16:
+      {
+        u16 value = DoMemoryRead<u16>(inst.address);
+        if (value == inst.value16)
+          index++;
+        else
+          index = count;
+      }
+      break;
+
       case InstructionCode::Slide:
       {
         if ((index + 1) >= instructions.size())
diff --git a/src/core/cheats.h b/src/core/cheats.h
index de0b0af37..b5a47f7f6 100644
--- a/src/core/cheats.h
+++ b/src/core/cheats.h
@@ -30,6 +30,7 @@ struct CheatCode
     Decrement16 = 0x11,
     Increment8 = 0x20,
     Decrement8 = 0x21,
+    ExitIfNotEqual16 = 0xC0,
     CompareEqual16 = 0xD0,
     CompareNotEqual16 = 0xD1,
     CompareLess16 = 0xD2,