C64Lib.Core.MOS6569.TriggerLightpen C# (CSharp) Method

        public void TriggerLightpen()
        {
            if (!lp_triggered)
            {		// Lightpen triggers only once per frame
                lp_triggered = true;

                lpx = (byte)(raster_x >> 1);	// Latch current coordinates
                lpy = (byte)raster_y;

                irq_flag |= 0x08;		// Trigger IRQ
                if ((irq_mask & 0x08) != 0)
                {
                    irq_flag |= 0x80;
                    _cpu.TriggerVICIRQ();
                }
            }
        }