private void loadcheat(string filename)
{
FileInfo fileInfo = new FileInfo(filename);
FileStream fileStream = fileInfo.OpenRead();
byte[] bytedata = new byte[fileInfo.Length];
fileStream.Read(bytedata, 0, bytedata.Length);
fileStream.Close();
Cheats.add_cheats(bytedata);
}
public static void work()
{
cycles += CPU.newticks;
bool runagain = true;
while (runagain)
{
runagain = false;
switch (gpustate)
{
case GPUState.VISIBLE:
if (cycles >= 1008) // 960 is drawing time
{
runagain = true;
cycles -= 1008;
gpustate = GPUState.HBLANK;
GBRegs.Sect_display.DISPSTAT_H_Blank_flag.write(1);
DMA.new_hblank = true;
if (GBRegs.Sect_display.DISPSTAT_H_Blank_IRQ_Enable.on())
{
IRP.set_irp_bit(IRP.IRPMASK_LCD_H_Blank);
}
old_dispstat = GBRegs.data[4];
GPU.once_per_hblank();
GPU.next_line(line);
}
break;
case GPUState.HBLANK:
if (cycles >= 224) // 272
{
runagain = true;
cycles -= 224;
nextline();
GBRegs.Sect_display.DISPSTAT_H_Blank_flag.write(0);
DMA.new_hblank = false;
if (line < 160)
{
gpustate = GPUState.VISIBLE;
}
else
{
gpustate = GPUState.VBLANK;
GPU.refpoint_update_all();
Cheats.apply_cheats();
GBRegs.Sect_display.DISPSTAT_V_Blank_flag.write(1);
DMA.new_vblank = true;
if (GBRegs.Sect_display.DISPSTAT_V_Blank_IRQ_Enable.on())
{
IRP.set_irp_bit(IRP.IRPMASK_LCD_V_Blank);
}
}
old_dispstat = GBRegs.data[4];
}
break;
case GPUState.VBLANK:
if (cycles >= 1008)
{
runagain = true;
cycles -= 1008;
gpustate = GPUState.VBLANKHBLANK;
GBRegs.Sect_display.DISPSTAT_H_Blank_flag.write(1);
//DMA.new_hblank = true; //!!! don't do here!
if (GBRegs.Sect_display.DISPSTAT_H_Blank_IRQ_Enable.on())
{
IRP.set_irp_bit(IRP.IRPMASK_LCD_H_Blank); // Note that no H-Blank interrupts are generated within V-Blank period. Really?
}
old_dispstat = GBRegs.data[4];
}
break;
case GPUState.VBLANKHBLANK:
if (cycles >= 224)
{
runagain = true;
cycles -= 224;
nextline();
GBRegs.Sect_display.DISPSTAT_H_Blank_flag.write(0);
DMA.new_hblank = false;
GPU.once_per_hblank();
if (line == 0)
{
gpio.framecount++;
gpio.update_time();
gpustate = GPUState.VISIBLE;
//GPU.next_line(line);
GBRegs.Sect_display.DISPSTAT_V_Blank_flag.write(0);
DMA.new_vblank = false;
}
else
{
gpustate = GPUState.VBLANK;
if (line == 227)
{
//GBRegs.Sect_display.DISPSTAT_V_Blank_flag.write(0);
}
}
old_dispstat = GBRegs.data[4];
}
break;
}
}
}