diff --git a/src/devices/bus/ss50/mps2.cpp b/src/devices/bus/ss50/mps2.cpp
index 7211aea1e3e..30bdd9e5a64 100644
--- a/src/devices/bus/ss50/mps2.cpp
+++ b/src/devices/bus/ss50/mps2.cpp
@@ -134,20 +134,24 @@ void ss50_mps2_device::device_add_mconfig(machine_config &config)
 {
 	ACIA6850(config, m_acia_upper, 0);
 	m_acia_upper->txd_handler().set("rs232_upper", FUNC(rs232_port_device::write_txd));
-	//m_acia_upper->rts_handler().set(FUNC(ss50_mps2_device::reader_control_w));
+	m_acia_upper->rts_handler().set("rs232_upper", FUNC(rs232_port_device::write_rts));
 	m_acia_upper->irq_handler().set("irq", FUNC(input_merger_device::in_w<0>));
 
 	rs232_port_device &rs232_upper(RS232_PORT(config, "rs232_upper", default_rs232_devices, "terminal"));
 	rs232_upper.rxd_handler().set(m_acia_upper, FUNC(acia6850_device::write_rxd));
+	rs232_upper.cts_handler().set(m_acia_upper, FUNC(acia6850_device::write_cts));
+	rs232_upper.dcd_handler().set(m_acia_upper, FUNC(acia6850_device::write_dcd));
 	rs232_upper.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal_upper));
 
 	ACIA6850(config, m_acia_lower, 0);
 	m_acia_lower->txd_handler().set("rs232_lower", FUNC(rs232_port_device::write_txd));
-	//m_acia_lower->rts_handler().set(FUNC(ss50_mps2_device::reader_control_w));
+	m_acia_lower->rts_handler().set("rs232_lower", FUNC(rs232_port_device::write_rts));
 	m_acia_lower->irq_handler().set("irq", FUNC(input_merger_device::in_w<1>));
 
 	rs232_port_device &rs232_lower(RS232_PORT(config, "rs232_lower", default_rs232_devices, "terminal"));
 	rs232_lower.rxd_handler().set(m_acia_lower, FUNC(acia6850_device::write_rxd));
+	rs232_lower.cts_handler().set(m_acia_lower, FUNC(acia6850_device::write_cts));
+	rs232_lower.dcd_handler().set(m_acia_lower, FUNC(acia6850_device::write_dcd));
 	rs232_lower.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal_lower));
 
 	INPUT_MERGER_ANY_HIGH(config, "irq").output_handler().set(FUNC(ss50_mps2_device::write_irq));