MBC 3

.github/workflows/cpp.yml

@@ -14,6 +14,14 @@ jobs:
       - uses: actions/checkout@v3
         with:
           submodules: recursive
+
+      - name: install_dependencies
+        run: |
+          if [ "$RUNNER_OS" == "Linux" ]; then
+            sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu `lsb_release -sc` main universe restricted multiverse"
+            sudo apt-get update -y -qq
+            sudo apt-get install libsdl2-dev
+          fi
 
       - name: build
         run: |

README.md

@@ -1,3 +1,15 @@
+# Dependencies
+## SDL
+### MacOS
+`brew install sdl2`
+### Linux
+`sudo apt install libsdl2-dev`
+
+### Windows 
+Download the development pack `SDL2-devel-2.0.5-VC.zip` from [here](https://github.com/libsdl-org/SDL/releases/tag/release-2.26.2)
+
+Or use winget or choco
+
 # Build
 ## Release
 ```

src/CMakeLists.txt

@@ -4,19 +4,27 @@ set(SOURCES
         cpu.cpp
         gameBoy.cpp
         mmap.cpp
-
+        graphics.cpp
         # -------
         # Header Files
         cpu.h
         gameBoy.h
         mmap.h
         types.h
+        graphics.h
         )
 
 target_sources(${PROJECT_NAME} PRIVATE ${SOURCES})
 
+find_package(SDL2 REQUIRED)
+include_directories(${SDL2_INCLUDE_DIRS})
+
 if (MSVC)
     set_target_properties(
             ${PROJECT_NAME} PROPERTIES
             VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/")
 endif ()
+
+target_link_libraries(${PROJECT_NAME} ${SDL2_LIBRARIES})
+
+set(SDL2_INCLUDE_DIRS "${CMAKE_CURRENT_LIST_DIR}/include")

src/cpu.cpp

@@ -58,9 +58,6 @@ CPU::CPU()
 	// Set isHalted to false
 	isHalted = false;
 
-	// The debug logging file
-	outfile = fopen("logfile.txt", "w");
-
 	// TODO: check the initial state of IME
 	IMEFlag = -1;
 
@@ -3971,20 +3968,6 @@ int CPU::executeInstruction(Byte opcode)
 
 int CPU::executeNextInstruction()
 {
-	// Check if boot execution is complete
-	// If yes, we can do logging in debug log outfile
-	if (mMap->readMemory(0xFF50) == 0x01)
-	{
-		dumpState();
-	}
-
-	// Turn off logging
-	// If reached infinite loop
-	if (reg_PC.dat == 0xCC62)
-	{
-		fclose(outfile);
-	}
-
 	// Get the opcode
 	Byte opcode = (*mMap)[reg_PC.dat];
 	return (this->*method_pointer[opcode])();
@@ -7789,11 +7772,6 @@ int CPU::SET_7_A()
 	return 4;
 }
 
-void CPU::dumpState()
-{
-	//fprintf(outfile, "A:%02X F:%02X B:%02X C:%02X D:%02X E:%02X H:%02X L:%02X SP:%04X PC:%04X PCMEM:%02X,%02X,%02X,%02X\n", reg_AF.hi, reg_AF.lo, reg_BC.hi, reg_BC.lo, reg_DE.hi, reg_DE.lo, reg_HL.hi, reg_HL.lo, reg_SP.dat, reg_PC.dat, (*mMap)[reg_PC.dat], (*mMap)[reg_PC.dat + 1], (*mMap)[reg_PC.dat + 2], (*mMap)[reg_PC.dat + 3]);
-}
-
 // Checks for interrupts and services them if needed
 // Behaviour source: https://gbdev.io/pandocs/Interrupts.html
 int CPU::performInterrupt()

src/cpu.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "types.h"
 #include "mmap.h"
+#include "graphics.h"
 
 // CPU Register
 // Pulled from https://gbdev.io/pandocs/CPU_Registers_and_Flags.html
@@ -104,6 +105,8 @@ class CPU
 	// Memory Map
 	MemoryMap* mMap;
 
+	PPU* ppu;
+
 	// ISA
 	// Pulled from https://izik1.github.io/gbops/index.html
 	typedef int (CPU::*method_function)();
@@ -1129,12 +1132,6 @@ class CPU
 	int SET_7_HLp();
 	int SET_7_A();
 
-	// Dump CPU state in logfile
-	// Useful for debugging
-	void dumpState();
-
-	FILE* outfile;
-
 public:
 	const int clockSpeed = 4194304; // 4.194304 MHz CPU
 	const int clockSpeedPerFrame = 70224; // 4194304 / 59.73fps
@@ -1144,6 +1141,9 @@ class CPU
 	// set the memory map
 	void setMemory(MemoryMap* memory) { mMap = memory; }
 
+	// set the PPU
+	void setPPU(PPU* ppu_arg) { ppu = ppu_arg; }
+
 	// set the Accumulator
 	void set_reg_A(Byte value) { reg_AF.hi = value; }