higan_v093r11_trace.patch

diff -x higan -x '*.so' -x '*~' -x '*.o' -uNr higan_v093r11/src/gb/cpu/mmio.cpp higan_v093r11_trace/src/gb/cpu/mmio.cpp
--- higan_v093r11/src/gb/cpu/mmio.cpp	2013-12-12 00:42:15.000000000 +0000
+++ higan_v093r11_trace/src/gb/cpu/mmio.cpp	2013-12-24 06:22:02.629748505 +0000
@@ -43,12 +43,36 @@
   }
 
   if(addr == 0xff01) {  //SB
+    if(status.serial_transfer) {
+      printf("PROHIBITED: SB read during serial transfer\n");
+      if(interface->tracer.open()) {
+	interface->tracer.print("PROHIBITED: SB read during serial transfer\n");
+	interface->tracer.flush();
+      }
+    }
+    
+    if(interface->tracer.open()) {
+      char buffer[1024];
+      sprintf(buffer, "SB R 0x%.2x\n", 0xff);
+      interface->tracer.print(buffer);
+      interface->tracer.flush();
+    }
+    
     return 0xff;
   }
 
   if(addr == 0xff02) {  //SC
-    return (status.serial_transfer << 7)
-         | (status.serial_clock << 0);
+    uint8 value = (status.serial_transfer << 7)
+                | (status.serial_clock << 0);
+    
+    if(interface->tracer.open()) {
+      char buffer[1024];
+      sprintf(buffer, "SC R 0x%.2x\n", 0xff);
+      interface->tracer.print(buffer);
+      interface->tracer.flush();
+    }
+    
+    return value;
   }
 
   if(addr == 0xff04) {  //DIV
@@ -142,13 +166,35 @@
     interface->joypWrite(status.p15, status.p14);
     return;
   }
-
+  
   if(addr == 0xff01) {  //SB
+    if(status.serial_transfer) {
+      printf("PROHIBITED: SB write during serial transfer\n");
+      if(interface->tracer.open()) {
+	interface->tracer.print("PROHIBITED: SB write during serial transfer\n");
+	interface->tracer.flush();
+      }
+    }
+    
+    if(interface->tracer.open()) {
+      char buffer[1024];
+      sprintf(buffer, "SB W 0x%.2x\n", data);
+      interface->tracer.print(buffer);
+      interface->tracer.flush();
+    }
+    
     status.serial_data = data;
     return;
   }
 
   if(addr == 0xff02) {  //SC
+    if(interface->tracer.open()) {
+      char buffer[1024];
+      sprintf(buffer, "SC W 0x%.2x\n", data);
+      interface->tracer.print(buffer);
+      interface->tracer.flush();
+    }
+    
     status.serial_transfer = data & 0x80;
     status.serial_clock = data & 0x01;
     if(status.serial_transfer) status.serial_bits = 8;
diff -x higan -x '*.so' -x '*~' -x '*.o' -uNr higan_v093r11/src/gb/interface/interface.cpp higan_v093r11_trace/src/gb/interface/interface.cpp
--- higan_v093r11/src/gb/interface/interface.cpp	2013-12-17 04:33:14.000000000 +0000
+++ higan_v093r11_trace/src/gb/interface/interface.cpp	2013-12-24 05:34:35.801610725 +0000
@@ -135,6 +135,27 @@
   video.generate_palette(mode);
 }
 
+bool Interface::tracerEnable(bool trace) {
+  string pathname = {path(group(ID::ROM)), "debug/"};
+  if(trace == true) directory::create(pathname);
+
+  if(trace == true && !tracer.open()) {
+    for(unsigned n = 0; n <= 999; n++) {
+      string filename = {pathname, "trace-", format<3, '0'>(n), ".log"};
+      if(file::exists(filename)) continue;
+      tracer.open(filename, file::mode::write);
+      return true;
+    }
+  }
+
+  if(trace == false && tracer.open()) {
+    tracer.close();
+    return true;
+  }
+
+  return false;
+}
+
 Interface::Interface() {
   interface = this;
   hook = nullptr;
diff -x higan -x '*.so' -x '*~' -x '*.o' -uNr higan_v093r11/src/gb/interface/interface.hpp higan_v093r11_trace/src/gb/interface/interface.hpp
--- higan_v093r11/src/gb/interface/interface.hpp	2013-12-17 04:33:00.000000000 +0000
+++ higan_v093r11_trace/src/gb/interface/interface.hpp	2013-12-24 05:33:47.901608407 +0000
@@ -60,7 +60,11 @@
 
   void paletteUpdate(PaletteMode mode);
 
+  bool tracerEnable(bool);
+  
   Interface();
+  
+  file tracer;
 
 private:
   vector<Device> device;