Added a class to contain the Pitfall 2 pager and a skeleton of initial work.

Machines/Atari2600/Atari2600.cpp

@@ -19,6 +19,7 @@
 #include "Cartridges/CartridgeMegaBoy.hpp"
 #include "Cartridges/CartridgeMNetwork.hpp"
 #include "Cartridges/CartridgeParkerBros.hpp"
+#include "Cartridges/CartridgePitfall2.hpp"
 #include "Cartridges/CartridgeTigervision.hpp"
 #include "Cartridges/CartridgeUnpaged.hpp"
 
@@ -82,14 +83,16 @@ void Machine::set_switch_is_enabled(Atari2600Switch input, bool state) {
 void Machine::configure_as_target(const StaticAnalyser::Target &target) {
 	const std::vector<uint8_t> &rom = target.cartridges.front()->get_segments().front().data;
 	switch(target.atari.paging_model) {
-		case StaticAnalyser::Atari2600PagingModel::None:			bus_.reset(new CartridgeUnpaged(rom));			break;
-		case StaticAnalyser::Atari2600PagingModel::CommaVid:		bus_.reset(new CartridgeCommaVid(rom));			break;
 		case StaticAnalyser::Atari2600PagingModel::ActivisionStack:	bus_.reset(new CartridgeActivisionStack(rom));	break;
-		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::CommaVid:		bus_.reset(new CartridgeCommaVid(rom));			break;
 		case StaticAnalyser::Atari2600PagingModel::MegaBoy:			bus_.reset(new CartridgeMegaBoy(rom));			break;
 		case StaticAnalyser::Atari2600PagingModel::MNetwork:		bus_.reset(new CartridgeMNetwork(rom));			break;
+		case StaticAnalyser::Atari2600PagingModel::None:			bus_.reset(new CartridgeUnpaged(rom));			break;
+		case StaticAnalyser::Atari2600PagingModel::ParkerBros:		bus_.reset(new CartridgeParkerBros(rom));		break;
+		case StaticAnalyser::Atari2600PagingModel::Pitfall2:		bus_.reset(new CartridgePitfall2(rom));			break;
+		case StaticAnalyser::Atari2600PagingModel::Tigervision:		bus_.reset(new CartridgeTigervision(rom));		break;
+
 		case StaticAnalyser::Atari2600PagingModel::Atari8k:
 			if(target.atari.uses_superchip) {
 				bus_.reset(new CartridgeAtari8kSuperChip(rom));

Machines/Atari2600/Cartridges/CartridgePitfall2.hpp

@@ -0,0 +1,65 @@
+//
+//  CartridgePitfall2.h
+//  Clock Signal
+//
+//  Created by Thomas Harte on 18/03/2017.
+//  Copyright © 2017 Thomas Harte. All rights reserved.
+//
+
+#ifndef Atari2600_CartridgePitfall2_hpp
+#define Atari2600_CartridgePitfall2_hpp
+
+namespace Atari2600 {
+
+class CartridgePitfall2: public Cartridge<CartridgePitfall2> {
+	public:
+		CartridgePitfall2(const std::vector<uint8_t> &rom) :
+			Cartridge(rom),
+			random_number_generator_(0),
+			featcher_address_{0, 0, 0, 0, 0, 0, 0, 0} {
+			rom_ptr_ = rom_.data();
+		}
+
+		void perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value) {
+			address &= 0x1fff;
+			if(!(address & 0x1000)) return;
+
+			switch(address) {
+				// The random number generator
+				case 0x1000: case 0x1001: case 0x1002: case 0x1003:
+					if(isReadOperation(operation)) {
+						*value = random_number_generator_;
+					}
+					random_number_generator_ = (uint8_t)(
+						(random_number_generator_ << 1) |
+						~((	(random_number_generator_ >> 7) ^
+							(random_number_generator_ >> 5) ^
+							(random_number_generator_ >> 4) ^
+							(random_number_generator_ >> 3)
+						) & 1));
+				break;
+
+				case 0x1040: case 0x1041: case 0x1042: case 0x1043: case 0x1044: case 0x1045: case 0x1046: case 0x1047:
+//					featcher_address_[address - 0x1040]
+				break;
+
+				case 0x1ff8: rom_ptr_ = rom_.data();		break;
+				case 0x1ff9: rom_ptr_ = rom_.data() + 4096;	break;
+
+				default:
+					if(isReadOperation(operation)) {
+						*value = rom_ptr_[address & 4095];
+					}
+				break;
+			}
+		}
+
+	private:
+		uint16_t featcher_address_[8];
+		uint8_t random_number_generator_;
+		uint8_t *rom_ptr_;
+};
+
+}
+
+#endif /* Atari2600_CartridgePitfall2_hpp */

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

@@ -953,6 +953,7 @@
 		4BEAC08B1E7E0DF800EE56B2 /* CartridgeTigervision.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = CartridgeTigervision.hpp; sourceTree = "<group>"; };
 		4BEAC08C1E7E0DF800EE56B2 /* CartridgeUnpaged.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = CartridgeUnpaged.hpp; sourceTree = "<group>"; };
 		4BEAC08D1E7E0E1A00EE56B2 /* Bus.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Bus.hpp; sourceTree = "<group>"; };
+		4BEAC08E1E7E110500EE56B2 /* CartridgePitfall2.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CartridgePitfall2.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>"; };
@@ -1971,6 +1972,7 @@
 				4BEAC08A1E7E0DF800EE56B2 /* CartridgeParkerBros.hpp */,
 				4BEAC08B1E7E0DF800EE56B2 /* CartridgeTigervision.hpp */,
 				4BEAC08C1E7E0DF800EE56B2 /* CartridgeUnpaged.hpp */,
+				4BEAC08E1E7E110500EE56B2 /* CartridgePitfall2.hpp */,
 			);
 			path = Cartridges;
 			sourceTree = "<group>";