void FixedUpdate()
{
const int frameCycles = VIC2.CYCLES_PER_LINE * VIC2.NUM_LINES;
// _ram.WriteIO (0xd021, (byte)colour);
_processor.Cycles = 0;
_audioCycles = 0;
for (ushort i = 0; i < VIC2.FIRST_VISIBLE_LINE; ++i)
{
ExecuteLine(i, false);
}
_vic2.BeginFrame();
for (ushort i = VIC2.FIRST_VISIBLE_LINE; i < VIC2.FIRST_INVISIBLE_LINE; ++i)
{
ExecuteLine(i, true);
}
for (ushort i = VIC2.FIRST_INVISIBLE_LINE; i < VIC2.NUM_LINES; ++i)
{
ExecuteLine(i, false);
}
// Render rest of audio until end of frame
if (_audioCycles < frameCycles)
{
_sid.BufferSamples(frameCycles - _audioCycles);
_audioCycles = frameCycles;
}
_textureDirty = true;
_ram.Write(0x2000, (byte)(FlashBorder ? 1 : 0));
//Debug.Log(_sid.samples.Count);
}
void Run()
{
_ram = new RAM64K();
_cpu = new MOS6502(_ram);
Console.Title = "6502";
Console.BackgroundColor = (ConsoleColor)6;
Console.ForegroundColor = (ConsoleColor)14;
Console.SetWindowSize(40, 26);
Console.SetBufferSize(40, 26);
Console.CursorSize = 100;
//TestB();
//return;
//_ram.Write(0x0000, 0x2F);
//_ram.Write(0x0001, 0x37);
//_ram.Write(0xD018, 21);
using (FileStream file = new FileStream("BASIC.ROM", FileMode.Open, FileAccess.Read))
_ram.Load(file, 0xA000, 8192);
using (FileStream file = new FileStream("CHAR.ROM", FileMode.Open, FileAccess.Read))
_ram.Load(file, 0xD000, 4096);
using (FileStream file = new FileStream("KERNAL.ROM", FileMode.Open, FileAccess.Read))
_ram.Load(file, 0xE000, 8192);
byte[] screenbuffer = new byte[1000];
byte raster = 0;
while (true)
{
_cpu.Process();
//Console.WriteLine(cpu.PC.ToString("X4"));
_ram.Write(0xD012, raster);
raster++;// if (raster == 312) raster = 0;
//Console.Clear();
if (_cpu.Cycles % 10000 == 0)
{
if (Console.KeyAvailable)
{
ConsoleKeyInfo key = Console.ReadKey(true);
_ram.Write16(0xDC00, (ushort)key.Key);
}
else
{
_ram.Write16(0xDC00, 0x0);
}
//Console.Title = _cpu.PC.ToString("X4");
Console.Title = _ram.Read16(0xDC00).ToString();
// Address where the C64 character screen buffer is located
ushort screenAddress = (ushort)(_ram[0x0288] << 8);
for (ushort i = 0; i < 1000; i++)
{
byte data = _ram.Read((ushort)(i + screenAddress));
if (data < 0x20)
{
data += 0x40;
}
//data &= 0x7F; // Reverse
if (data != screenbuffer[i])
{
Console.CursorVisible = false;
if ((data & 0x80) != 0)
{
Console.BackgroundColor = (ConsoleColor)14;
Console.ForegroundColor = (ConsoleColor)6;
}
Console.SetCursorPosition(i % 40, i / 40);
Console.Write((char)(data));
if ((data & 0x80) != 0)
{
Console.BackgroundColor = (ConsoleColor)6;
Console.ForegroundColor = (ConsoleColor)14;
}
}
screenbuffer[i] = data;
}
if (_ram[0x00CC] == 0) // Draw cursor when visible
{
int x = _ram[0x00CA];
int y = _ram[0x00C9];
if (Console.CursorLeft != x || Console.CursorTop != y)
{
Console.SetCursorPosition(x, y);
}
if (!Console.CursorVisible)
{
Console.CursorVisible = true;
}
}
}
//System.Threading.Thread.Sleep(50);
/*
* cpu.Op();
* Console.WriteLine("test00: " + ram.Read(0x022A).ToString("X2"));
* Console.WriteLine("test01: " + ram.Read(0xA9).ToString("X2"));
* Console.WriteLine("test02: " + ram.Read(0x71).ToString("X2"));
* System.Threading.Thread.Sleep(50);
* if (cpu.PC == 0x45C0)
* {
*
* Console.WriteLine("FINAL: " + ram.Read(0x0210).ToString("X2"));
* System.Threading.Thread.Sleep(50);
* }
*/
}
}