diff --git a/src/devices/bus/hp_dio/hp98644.cpp b/src/devices/bus/hp_dio/hp98644.cpp
index 09d70616ae7..efc93c3e834 100644
--- a/src/devices/bus/hp_dio/hp98644.cpp
+++ b/src/devices/bus/hp_dio/hp98644.cpp
@@ -87,7 +87,7 @@ static INPUT_PORTS_START(hp98644_port)
 	PORT_DIPSETTING(0x00, DEF_STR(Off))
 	PORT_DIPSETTING(REG_SWITCHES_MODEM_EN, DEF_STR(On))
 
-	PORT_DIPNAME(REG_SWITCHES_INT_LEVEL_MASK << REG_SWITCHES_INT_LEVEL_SHIFT, 0x00, "Interrupt level")
+	PORT_DIPNAME(REG_SWITCHES_INT_LEVEL_MASK << REG_SWITCHES_INT_LEVEL_SHIFT, 0x02, "Interrupt level")
 	PORT_DIPSETTING(0 << REG_SWITCHES_INT_LEVEL_SHIFT, "3")
 	PORT_DIPSETTING(1 << REG_SWITCHES_INT_LEVEL_SHIFT, "4")
 	PORT_DIPSETTING(2 << REG_SWITCHES_INT_LEVEL_SHIFT, "5")
@@ -176,7 +176,8 @@ READ16_MEMBER(dio16_98644_device::io_r)
 		break;
 
 	case 1:
-		ret = m_control | m_control << 8;
+		ret = m_control | m_control << 8 | \
+		(((m_switches->read() >> REG_SWITCHES_INT_LEVEL_SHIFT) & REG_SWITCHES_INT_LEVEL_MASK) << 4);
 		break;
 
 	case 0x08:
diff --git a/src/mame/drivers/hp9k_3xx.cpp b/src/mame/drivers/hp9k_3xx.cpp
index 5f857eea525..729179bec97 100644
--- a/src/mame/drivers/hp9k_3xx.cpp
+++ b/src/mame/drivers/hp9k_3xx.cpp
@@ -270,7 +270,6 @@ void hp9k3xx_state::machine_reset()
 void hp9k3xx_state::machine_start()
 {
 	m_bus_error_timer = timer_alloc(0);
-	m_maincpu->set_reset_callback(write_line_delegate(FUNC(hp9k3xx_state::cpu_reset), this));
 }
 
 void hp9k3xx_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)