Function IOPReadFIFO

pcsx2/DEV9/DEV9.cpp:284–316

	dev9.fifo_bytes_read += write;
}
void IOPReadFIFO()
{
	pxAssert((dev9.dma_iop_ptr != nullptr) && (dev9.xfr_ctrl & SPD_XFR_DMAEN));
	pxAssert((dev9.xfr_ctrl & SPD_XFR_WRITE) == 0);

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

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

	pxAssert(unread <= SPD_DBUF_AVAIL_MAX * 512);

	if (read == 0)
		return;

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

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

	dev9.dma_iop_transfered += read;
	dev9.fifo_bytes_read += read;
	if (dev9.fifo_bytes_read > dev9.fifo_bytes_write)
		Console.Error("DEV9: UNDERFLOW BY IOP");
}
void IOPWriteFIFO()
{
	pxAssert((dev9.dma_iop_ptr != nullptr) && (dev9.xfr_ctrl & SPD_XFR_DMAEN));