Implemented OAM, SAT so sprites and background scrolling now work

Core/Cpu/Z80.cs

@@ -1506,6 +1506,49 @@ namespace Core.Cpu
                         if ((n & 0x02) != 0) AF.Low |= 0x20; // Bit 5 from bit 1
                         return 16;
                     }
+                case 0xA2: // INI
+                    {
+                        // 1. Read from the port specified by BC
+                        byte inValA2 = _simpleIoBus.ReadPort(BC.Word);
+
+                        // 2. Write the value to memory at HL
+                        WriteMemory(HL.Word, inValA2);
+
+                        // 3. Decrement B (the byte counter)
+                        BC.High--;
+
+                        // 4. Increment HL (the memory pointer)
+                        HL.Word++;
+
+                        // 5. Update Flags
+                        AF.Low |= 0x02; // N is always set (1)
+                        if (BC.High == 0) AF.Low |= 0x40; // Z is set if B reaches 0
+                        else AF.Low &= 0xBF;              // Z is cleared otherwise
+
+                        return 16; // Takes 16 T-States
+                    }
+                case 0xB2: // INIR
+                    {
+                        // This does exactly the same thing as INI, but loops until B == 0
+                        byte inValB2 = _simpleIoBus.ReadPort(BC.Word);
+                        WriteMemory(HL.Word, inValB2);
+                        BC.High--;
+                        HL.Word++;
+
+                        AF.Low |= 0x02; // N is always set
+
+                        if (BC.High != 0)
+                        {
+                            AF.Low &= 0xBF; // Z is reset
+                            PC -= 2;        // Loop back and execute ED B2 again!
+                            return 21;
+                        }
+                        else
+                        {
+                            AF.Low |= 0x40; // Z is set
+                            return 16;
+                        }
+                    }
                 case 0xA3: // OUTI
                     {
                         // 1. Read data from memory at HL