case 0x19: case 0x1a: case 0x1b:
	{
		riva128->pci_regs[addr] = val;
		riva128->rma_addr = riva128->pci_regs[0x19] << 8;
		io_removehandler(riva128->rma_addr, 0x0100, riva128_rma_in, NULL, NULL, riva128_rma_out, NULL, NULL, riva128);
		if(riva128->rma_addr)
		{
			io_sethandler(riva128->rma_addr, 0x0100, riva128_rma_in, NULL, NULL, riva128_rma_out, NULL, NULL, riva128);
		}
	}