Added keyboard

.vscode/launch.json

@@ -5,7 +5,7 @@
 	"version": "0.2.0",
 	"configurations": [
 		{
-			"type": "firefox",
+			"type": "chrome",
 			"request": "launch",
 			"name": "Debug chip8 emulator",
 			"reAttach": true,

src/chip8Emulator.ts

@@ -1,20 +1,33 @@
 import CPU from './cpu';
+import Keyboard from './keyboard'
 
 class Chip8Emulator {
 	cpu: CPU;
+	keyboard: Keyboard;
 
 	constructor() {
 		this.cpu = new CPU();
-		console.log("Called constructor for Chip8Emulator");
+		this.keyboard = new Keyboard();
-		console.log("oh y");
 	}
 
-	loadRomAndStart() {
+	loadRom(rom: Uint8Array) {
-		// Load rom
+
-		this.cpu = new CPU();
+	}
-		this.cpu.dosomethingcool();
+
-		
+	emulateCycle() {
-		// Start full emulator
+		// Fetch opcode
+		// Decode opcode
+		// Execute opcode
+
+		// Update timers
+	}
+
+	drawGraphics() {
+
+	}
+
+	setKeys() {
+
 	}
 
 }

src/cpu.ts

@@ -1,13 +1,96 @@
+const SCREEN_WIDTH = 64;
+const SCREEN_HEIGHT = 32;
+
+const MEMORY_SIZE = 4096;
+const STACK_SIZE = 16;
+
+const REGISTERS = 16;
+
 class CPU {
-	flags: Number;
+	pc: number;
+	indexReg: number;
+	registers: Uint8Array;
 
+	delayTimer: number;
+	soundTimer: number;
+
+	stackPointer: number;
+	stack: Array<Function>;
+
+	memory: Uint8Array;
+	displayMemory: Uint8Array;
+	
 	constructor() {
-		this.flags = 0;
+		this.memory = new Uint8Array(MEMORY_SIZE);
+		this.displayMemory = new Uint8Array(SCREEN_WIDTH*SCREEN_HEIGHT);
+		this.pc = 0;
+		this.indexReg = 0;
+		this.stackPointer = 0;
+		this.stack = new Array<Function>(STACK_SIZE);
+		this.delayTimer = 0;
+		this.soundTimer = 0;
+		this.registers = new Uint8Array(REGISTERS);
+
+		this.clearMemory();
+		this.clearDisplay();
+		this.clearRegisters();
+
+		// 0x000-0x1FF - Chip 8 interpreter
+		// 0x050-0x0A0 - 4x5 pixel font set (0-F)
+		// 0x200-0xFFF - Program ROM and work RAM
+		this.setupFont();
 	}
 
-	dosomethingcool() {
+	clearRegisters() {
-		console.log("Doing something really cool");
+		this.registers.fill(0);
+		this.pc = 0;
+		this.indexReg = 0;
+		this.stackPointer = 0;
+		this.delayTimer = 0;
+		this.soundTimer = 0;
 	}
+
+	clearMemory() {
+		this.memory.fill(0);
+	}
+
+	clearDisplay() {
+		this.displayMemory.fill(0);
+	}
+
+
+	setupFont() {
+		// Using address from 050 - 09F ??
+		let addressFont = 0x050;
+		
+		// Every character has 5 Bytes
+		const characters = [
+			0xF0, 0x90, 0x90, 0x90, 0xF0, // 0
+			0x20, 0x60, 0x20, 0x20, 0x70, // 1
+			0xF0, 0x10, 0xF0, 0x80, 0xF0, // 2
+			0xF0, 0x10, 0xF0, 0x10, 0xF0, // 3
+			0x90, 0x90, 0xF0, 0x10, 0x10, // 4
+			0xF0, 0x80, 0xF0, 0x10, 0xF0, // 5
+			0xF0, 0x80, 0xF0, 0x90, 0xF0, // 6
+			0xF0, 0x10, 0x20, 0x40, 0x40, // 7
+			0xF0, 0x90, 0xF0, 0x90, 0xF0, // 8
+			0xF0, 0x90, 0xF0, 0x10, 0xF0, // 9
+			0xF0, 0x90, 0xF0, 0x90, 0x90, // A
+			0xE0, 0x90, 0xE0, 0x90, 0xE0, // B
+			0xF0, 0x80, 0x80, 0x80, 0xF0, // C
+			0xE0, 0x90, 0x90, 0x90, 0xE0, // D
+			0xF0, 0x80, 0xF0, 0x80, 0xF0, // E
+			0xF0, 0x80, 0xF0, 0x80, 0x80  // F
+		];
+
+		this.memory.set(characters, addressFont);
+	}
+
+
+	
+
+
+	
 }
 
 export default CPU;

src/keyboard.ts

@@ -0,0 +1,40 @@
+const KEYS = 16;
+
+
+// Keyboard
+// 1  2  3  C
+// 4  5  6  D
+// 7  8  9  E
+// A  0  B  F 
+class Keyboard {
+	keys : Uint8Array;
+
+	userKeyboardMap: Map<number, number>;
+
+	constructor() {
+		this.keys = new Uint8Array(KEYS);
+
+		// Used to check keys from the user event.keys
+		this.userKeyboardMap = new Map<number, number>();
+	}
+
+	private setKey(key: number, pressed: boolean) {
+		this.keys[key] = pressed ? 1 : 0;
+	}
+
+	public setUserKey(userKey: number, key: number) {
+		this.userKeyboardMap.set(userKey, key);
+	}
+
+	public userKeyPressedDown(userKey: number) {
+		let keyVal: number = this.userKeyboardMap.get(userKey) ?? -1;
+		if(keyVal != -1) this.setKey(keyVal, true);
+	}
+
+	public userKeyPressedUp(userKey: number) {
+		let keyVal: number = this.userKeyboardMap.get(userKey) ?? -1;
+		if(keyVal != -1) this.setKey(keyVal, false);
+	}
+}
+
+export default Keyboard;