From 62f8a07104b57b75071318098145d99012dbc908 Mon Sep 17 00:00:00 2001
From: Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
Date: Sun, 27 Oct 2013 10:52:45 +0200
Subject: [PATCH] Support notifying latches

---
 snes/cpu/mmio/mmio.cpp       | 1 +
 snes/cpu/timing/joypad.cpp   | 1 +
 snes/interface/interface.cpp | 5 +++++
 snes/interface/interface.hpp | 1 +
 4 files changed, 8 insertions(+)

diff --git a/snes/cpu/mmio/mmio.cpp b/snes/cpu/mmio/mmio.cpp
index c5ee930f..b7afff00 100755
--- a/snes/cpu/mmio/mmio.cpp
+++ b/snes/cpu/mmio/mmio.cpp
@@ -33,6 +33,7 @@ void CPU::mmio_w2183(uint8 data) {
 //strobing $4016.d0 affects both controller port latches.
 //$4017 bit 0 writes are ignored.
 void CPU::mmio_w4016(uint8 data) {
+  if(data&1) interface->notifyLatched();
   input.port1->latch(data & 1);
   input.port2->latch(data & 1);
 }
diff --git a/snes/cpu/timing/joypad.cpp b/snes/cpu/timing/joypad.cpp
index 6e15346e..c69b708f 100755
--- a/snes/cpu/timing/joypad.cpp
+++ b/snes/cpu/timing/joypad.cpp
@@ -7,6 +7,7 @@ void CPU::step_auto_joypad_poll() {
 
     if(status.auto_joypad_active && status.auto_joypad_poll) {
       if(status.auto_joypad_counter == 0) {
+        interface->notifyLatched();
         input.port1->latch(1);
         input.port2->latch(1);
         input.port1->latch(0);
diff --git a/snes/interface/interface.cpp b/snes/interface/interface.cpp
index 0a21a132..6685556c 100755
--- a/snes/interface/interface.cpp
+++ b/snes/interface/interface.cpp
@@ -28,4 +28,9 @@ time_t Interface::randomSeed()
   return time(0);
 }
 
+void Interface::notifyLatched()
+{
+  //Nothing.
+}
+
 }
diff --git a/snes/interface/interface.hpp b/snes/interface/interface.hpp
index 30ee7fde..203f7b0c 100755
--- a/snes/interface/interface.hpp
+++ b/snes/interface/interface.hpp
@@ -7,6 +7,7 @@ struct Interface {
   virtual void message(const string &text);
   virtual time_t currentTime();
   virtual time_t randomSeed();
+  virtual void notifyLatched();
 };
 
 extern Interface *interface;