Function IOPWriteFIFO

pcsx2/DEV9/DEV9.cpp:317–350

		Console.Error("DEV9: UNDERFLOW BY IOP");
}
void IOPWriteFIFO()
{
	pxAssert((dev9.dma_iop_ptr != nullptr) && (dev9.xfr_ctrl & SPD_XFR_DMAEN));
	pxAssert(dev9.xfr_ctrl & SPD_XFR_WRITE);

	const int unread = (dev9.fifo_bytes_write - dev9.fifo_bytes_read);
	const int space = (SPD_DBUF_AVAIL_MAX * 512 - unread);
	const int base = dev9.fifo_bytes_write % (SPD_DBUF_AVAIL_MAX * 512);

	const int remain = dev9.dma_iop_size - dev9.dma_iop_transfered;
	const int write = std::min(remain, space);

	pxAssert(unread <= SPD_DBUF_AVAIL_MAX * 512);

	if (write == 0)
		return;

	if (base + write > SPD_DBUF_AVAIL_MAX * 512)
	{
		const int was = SPD_DBUF_AVAIL_MAX * 512 - base;

		std::memcpy(dev9.fifo + base, dev9.dma_iop_ptr + dev9.dma_iop_transfered, was);
		std::memcpy(dev9.fifo + base, dev9.dma_iop_ptr + dev9.dma_iop_transfered + was, write - was);
	}
	else
	{
		std::memcpy(dev9.fifo + base, dev9.dma_iop_ptr + dev9.dma_iop_transfered, write);
	}

	dev9.dma_iop_transfered += write;
	dev9.fifo_bytes_write += write;
	if ((dev9.fifo_bytes_write - dev9.fifo_bytes_read) > SPD_DBUF_AVAIL_MAX * 512)
		Console.Error("DEV9: OVERFLOW BY IOP");
}
void FIFOIntr()
{
	//FIFO Buffer Full/Empty