Re-emplaced the MegaBoy. Also cut detritus from the main Atari header.

Machines/Atari2600/Atari2600.cpp

@@ -16,6 +16,7 @@
 #include "CartridgeActivisionStack.hpp"
 #include "CartridgeCBSRAMPlus.hpp"
 #include "CartridgeCommaVid.hpp"
+#include "CartridgeMegaBoy.hpp"
 #include "CartridgeParkerBros.hpp"
 #include "CartridgeTigervision.hpp"
 #include "CartridgeUnpaged.hpp"
@@ -27,8 +28,6 @@ namespace {
 }
 
 Machine::Machine() :
-	rom_(nullptr),
-	rom_pages_{nullptr, nullptr, nullptr, nullptr},
 	frame_record_pointer_(0),
 	is_ntsc_(true) {
 	set_clock_rate(NTSC_clock_rate);
@@ -88,6 +87,7 @@ void Machine::configure_as_target(const StaticAnalyser::Target &target) {
 		case StaticAnalyser::Atari2600PagingModel::ParkerBros:		bus_.reset(new CartridgeParkerBros(rom));		break;
 		case StaticAnalyser::Atari2600PagingModel::Tigervision:		bus_.reset(new CartridgeTigervision(rom));		break;
 		case StaticAnalyser::Atari2600PagingModel::CBSRamPlus:		bus_.reset(new CartridgeCBSRAMPlus(rom));		break;
+		case StaticAnalyser::Atari2600PagingModel::MegaBoy:			bus_.reset(new CartridgeMegaBoy(rom));			break;
 		case StaticAnalyser::Atari2600PagingModel::Atari8k:
 			if(target.atari.uses_superchip) {
 				bus_.reset(new CartridgeAtari8kSuperChip(rom));
@@ -112,9 +112,6 @@ void Machine::configure_as_target(const StaticAnalyser::Target &target) {
 	}
 
 /*	switch(target.atari.paging_model) {
-		case StaticAnalyser::Atari2600PagingModel::MegaBoy:
-			mega_boy_page_ = 15;
-		break;
 		case StaticAnalyser::Atari2600PagingModel::MNetwork:
 			ram_.resize(2048);
 			// Put 256 bytes of RAM for writing at 0x1800 and reading at 0x1900

Machines/Atari2600/Atari2600.hpp

@@ -53,21 +53,7 @@ class Machine:
 		virtual void crt_did_end_batch_of_frames(Outputs::CRT::CRT *crt, unsigned int number_of_frames, unsigned int number_of_unexpected_vertical_syncs);
 
 	private:
-		// ROM information
+		// the bus
-		uint8_t *rom_;
-		size_t rom_size_;
-
-		// Memory model
-		uint8_t *rom_pages_[4], *ram_write_targets_[32], *ram_read_targets_[32];
-		uint8_t mega_boy_page_;
-		StaticAnalyser::Atari2600PagingModel paging_model_;
-		std::vector<uint8_t> ram_;
-		uint8_t throwaway_ram_[128];
-
-		// Activision stack records
-		uint8_t last_opcode_;
-
-		// the cartridge
 		std::unique_ptr<Bus> bus_;
 
 		// output frame rate tracker

Machines/Atari2600/CartridgeMegaBoy.hpp

@@ -0,0 +1,45 @@
+//
+//  CartridgeMegaBoy.h
+//  Clock Signal
+//
+//  Created by Thomas Harte on 18/03/2017.
+//  Copyright © 2017 Thomas Harte. All rights reserved.
+//
+
+#ifndef Atari2600_CartridgeMegaBoy_hpp
+#define Atari2600_CartridgeMegaBoy_hpp
+
+#include "Cartridge.hpp"
+
+namespace Atari2600 {
+
+class CartridgeMegaBoy: public Cartridge<CartridgeMegaBoy> {
+	public:
+		CartridgeMegaBoy(const std::vector<uint8_t> &rom) :
+			Cartridge(rom),
+			current_page_(0) {
+			rom_ptr_ = rom_.data();
+		}
+
+		void perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value) {
+			address &= 0x1fff;
+			if(!(address & 0x1000)) return;
+
+			if(address == 0x1ff0) {
+				current_page_ = (current_page_ + 1) & 15;
+				rom_ptr_ = rom_.data() + current_page_ * 4096;
+			}
+
+			if(isReadOperation(operation)) {
+				*value = rom_ptr_[address & 4095];
+			}
+		}
+
+	private:
+		uint8_t *rom_ptr_;
+		uint8_t current_page_;
+};
+
+}
+
+#endif /* CartridgeMegaBoy_h */

OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj

@@ -950,6 +950,7 @@
 		4BEAC07B1E7DE74200EE56B2 /* CartridgeParkerBros.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CartridgeParkerBros.hpp; sourceTree = "<group>"; };
 		4BEAC07C1E7DEA6B00EE56B2 /* CartridgeTigervision.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CartridgeTigervision.hpp; sourceTree = "<group>"; };
 		4BEAC07D1E7DF13E00EE56B2 /* CartridgeCBSRAMPlus.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CartridgeCBSRAMPlus.hpp; sourceTree = "<group>"; };
+		4BEAC07E1E7DF2D000EE56B2 /* CartridgeMegaBoy.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CartridgeMegaBoy.hpp; sourceTree = "<group>"; };
 		4BEE0A6A1D72496600532C7B /* Cartridge.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Cartridge.cpp; sourceTree = "<group>"; };
 		4BEE0A6B1D72496600532C7B /* Cartridge.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = Cartridge.hpp; sourceTree = "<group>"; };
 		4BEE0A6D1D72496600532C7B /* PRG.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PRG.cpp; sourceTree = "<group>"; };
@@ -1124,6 +1125,7 @@
 				4BEAC0791E7DD86E00EE56B2 /* CartridgeAtari32k.hpp */,
 				4BEAC07D1E7DF13E00EE56B2 /* CartridgeCBSRAMPlus.hpp */,
 				4BA443E71E7DB54700C86749 /* CartridgeCommaVid.hpp */,
+				4BEAC07E1E7DF2D000EE56B2 /* CartridgeMegaBoy.hpp */,
 				4BEAC07B1E7DE74200EE56B2 /* CartridgeParkerBros.hpp */,
 				4BEAC07C1E7DEA6B00EE56B2 /* CartridgeTigervision.hpp */,
 				4BE0699A1E7C9C5A00DD379F /* CartridgeUnpaged.hpp */,