Added stack display

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

main.cpp

@@ -53,7 +53,7 @@ public:
 	};
 	std::array<bool,2048>display;
 	std::array<uint8_t,2048>screen;
-	std::stack<uint8_t>stack;
+	std::list<uint8_t>stack;
 	float pulse=0;
 	uint8_t delay_timer,sound_timer;
 	uint16_t pc=0x200;
@@ -65,6 +65,7 @@ public:
 	std::array<Key,16>keymap{X,K1,K2,K3,Q,W,E,A,S,D,Z,C,K4,R,F,V};
 	bool USE_ORIGINAL_CHIP8_SET=true; //True means use the original CHIP-8 spec (COSMAC VIP emulation). Set to false to use CHIP-48 spec.
 	bool PAUSED=true;
+	long instructionCount=0;
 
 	std::string Display8(int number){
 		std::bitset<8>numb(number);
@@ -75,6 +76,14 @@ public:
 		return numb.to_string();
 	}
 
+	void advanceTimers(){
+		if (delay_timer>0){
+			delay_timer--;
+		}
+		if (sound_timer>0){
+			sound_timer--;
+		}
+	}
 
 	bool OnUserCreate() override
 	{
@@ -112,12 +121,7 @@ public:
 		if (!USE_DEBUG_DISPLAY||!PAUSED){
 			pulse+=fElapsedTime;
 			if (pulse>=1/60.f){
-				if (delay_timer>0){
-					delay_timer--;
-				}
-				if (sound_timer>0){
-					sound_timer--;
-				}
+				advanceTimers();
 				pulse-=1/60.f;
 
 				for (int i=0;i<10;i++){
@@ -128,15 +132,31 @@ public:
 		} else {
 			if (GetKey(OEM_6).bPressed){
 				RunInstruction();
+				instructionCount++;
+				if (instructionCount%10==0){
+					advanceTimers(); //After 10 instructions, 1/60th of a second has passed.
+				}
+				DrawDisplay();
+			} else
+			if (GetKey(SPACE).bHeld){
+				RunInstruction();
+				instructionCount++;
+				if (instructionCount%10==0){
+					advanceTimers(); //After 10 instructions, 1/60th of a second has passed.
+				}
 				DrawDisplay();
 			}
 		}
 		std::stringstream s;
 		s<<"PC: 0x"<<std::setfill('0')<< std::setw(4)<<std::hex<<pc;
-		DrawStringDecal(vi2d{8,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+16},s.str());
+		std::string ss=s.str();
+		std::transform(ss.begin()+6,ss.end(),ss.begin()+6,::toupper);
+		DrawStringDecal(vi2d{8,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+16},ss);
 		std::stringstream instruction;
-		instruction<<"0x"<<std::setfill('0')<< std::setw(2)<<std::hex<<(int)memory[pc]<<std::setw(2)<<(int)memory[pc+1];
-		DrawStringDecal(vi2d{12,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+26},instruction.str());
+		instruction<<"0x"<<std::setfill('0')<< std::setw(2)<<std::hex<<(int)memory[pc]<<std::setw(2)<<(int)memory[pc+1]<<"    "<<GetInstructionDescription(memory[pc]<<8|memory[pc+1]);
+		ss=instruction.str();
+		std::transform(ss.begin()+2,ss.end(),ss.begin()+2,::toupper);
+		DrawStringDecal(vi2d{12,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+26},ss);
 
 		for (int i=0;i<21;i++){
 			uint16_t tmp=pc+(i-10)*2;
@@ -144,11 +164,48 @@ public:
 				std::stringstream tmp_s;
 				tmp_s<<"0x"<<std::setfill('0')<< std::setw(4)<<std::hex<<tmp<<"    "<<std::setw(2)<<(int)memory[tmp]<<std::setw(2)<<(int)memory[tmp+1]<<"    "<<GetInstructionDescription(memory[tmp]<<8|memory[tmp+1]);
 				std::string ss=tmp_s.str();
-				std::transform(ss.begin(),ss.end(),ss.begin(),::toupper);
+				std::transform(ss.begin()+2,ss.end(),ss.begin()+2,::toupper);
 				DrawStringDecal(vi2d{14+EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_WIDTH,8+i*10},ss,(tmp==pc)?YELLOW:WHITE);
 			}
 		}
 
+		DrawStringDecal(vi2d{8,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+44},"REG");
+		for (int i=0;i<16;i++){
+			std::stringstream s;
+			s<<"V"+std::to_string(i)<<std::right<<std::setfill(' ')<<std::setw((i>=10)?3:4)<<(int)reg[i];
+			DrawStringDecal(vi2d{12+i/8*64,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+54+i%8*10},s.str());
+		}
+
+		std::stringstream index_s;
+		index_s<<"0x"<<std::hex<<std::setfill('0')<<std::setw(4)<<index;
+		DrawStringDecal(vi2d{8,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+64+10*8},"INDEX: "+index_s.str());
+		DrawStringDecal(vi2d{8,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+84+10*8},"STACK: ");
+
+		int offsetX=0;
+		bool first=true;
+		uint8_t prevVal;
+		bool firstVal=true;
+		for (uint8_t&val:stack){
+			if (first) {
+				first=false;
+				prevVal=val;
+			} else {
+				first=true;
+				std::stringstream hexStack;
+				hexStack<<"0x"<<std::hex<<std::setfill('0')<<std::setw(4)<<(val<<8|prevVal);
+				std::string ss=hexStack.str();
+				std::transform(ss.begin()+2,ss.end(),ss.begin()+2,::toupper);
+				DrawStringDecal(vi2d{12+offsetX,EMULATOR_PIXEL_SIZE*EMULATOR_SCREEN_HEIGHT+94+10*8},((!firstVal)?" <- ":"")+ss);
+				if (firstVal){
+					offsetX+=6*8;
+				} else {
+					offsetX+=10*8;
+				}
+				firstVal=false;
+			}
+		}
+
+
 		return true;
 	}
 
@@ -349,10 +406,10 @@ public:
 					}break;
 					case 0x0EE:{ //Return from subroutine.
 						uint8_t byte1,byte2;
-						byte1=stack.top();
-						stack.pop();
-						byte2=stack.top();
-						stack.pop();
+						byte1=stack.front();
+						stack.pop_front();
+						byte2=stack.front();
+						stack.pop_front();
 						pc=byte2<<8|byte1;
 						//std::cout<<"Exiting subroutine to 0x"<<std::hex<<pc<<std::endl;
 					}break;
@@ -362,8 +419,8 @@ public:
 				pc=NNN;
 			}break;
 			case 0x2:{ //calls the subroutine at memory location NNN
-				stack.push(pc>>8);
-				stack.push(pc&0xFF);
+				stack.push_front(pc>>8);
+				stack.push_front(pc&0xFF);
 				//std::cout<<"Pushed 0x"<<std::hex<<pc<<" onto stack"<<std::endl;
 				pc=NNN;
 				//std::cout<<"Entering subroutine @ 0x"<<std::hex<<NNN<<std::endl;