Register handlers with addresses

* Since the components will never give pages directly, let them
use addresses instead and compute the page in the register function
to save some work on the component side.

src/common/emulator.h

@@ -58,7 +58,7 @@ namespace common
         void write(uint32_t addr, T data);
 
         template <typename T = uint32_t, typename R, typename W>
-        void add_handler(int page, Component* c, R reader, W writer);
+        void add_handler(uint32_t address, Component* c, R reader, W writer);
 
         static const uint32_t calculate_page(const uint32_t addr);
 
@@ -135,8 +135,10 @@ namespace common
     }
     
     template <typename T, typename R, typename W>
-    inline void Emulator::add_handler(int page, Component* c, R reader, W writer)
+    inline void Emulator::add_handler(uint32_t address, Component* c, R reader, W writer)
     {
+        uint32_t page = calculate_page(address);
+
         auto h = new Handler<T>;
         h->c = c;
         h->writer = (Writer<T>)writer;

src/cpu/iop/dma.cc

@@ -10,11 +10,8 @@ namespace iop
 		emulator(emu)
 	{
 		/* Register our functions to the Emulator. */
-		const uint32_t PAGE1 = common::Emulator::calculate_page(0x1f801080);
-		const uint32_t PAGE2 = common::Emulator::calculate_page(0x1f801500);
-		
-		emulator->add_handler(PAGE1, this, &DMAController::read, &DMAController::write);
-		emulator->add_handler(PAGE2, this, &DMAController::read, &DMAController::write);
+		emulator->add_handler(0x1f801080, this, &DMAController::read, &DMAController::write);
+		emulator->add_handler(0x1f801500, this, &DMAController::read, &DMAController::write);
 	}
 
 	void DMAController::tick()

src/gs/gif.cc

@@ -22,8 +22,7 @@ namespace gs
 	GIF::GIF(common::Emulator* parent) :
 		emulator(parent)
 	{
-		uint32_t PAGE1 = common::Emulator::calculate_page(0x10003000);
-		emulator->add_handler(PAGE1, this, &GIF::read, &GIF::write);
+		emulator->add_handler(0x10003000, this, &GIF::read, &GIF::write);
 	}
 	
 	uint32_t GIF::read(uint32_t addr)