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Diffstat (limited to 'src/mame/drivers/s6.cpp')
-rw-r--r--src/mame/drivers/s6.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mame/drivers/s6.cpp b/src/mame/drivers/s6.cpp
index 3db987a99cc..a6a18523393 100644
--- a/src/mame/drivers/s6.cpp
+++ b/src/mame/drivers/s6.cpp
@@ -447,6 +447,7 @@ void s6_state::s6(machine_config &config)
PIA6821(config, m_pia28, 0);
m_pia28->readpa_handler().set(FUNC(s6_state::dips_r));
+ m_pia28->set_port_a_input_overrides_output_mask(0xff);
m_pia28->writepa_handler().set(FUNC(s6_state::dig0_w));
m_pia28->writepb_handler().set(FUNC(s6_state::dig1_w));
m_pia28->ca2_handler().set(FUNC(s6_state::pia28_ca2_w));
@@ -456,6 +457,7 @@ void s6_state::s6(machine_config &config)
PIA6821(config, m_pia30, 0);
m_pia30->readpa_handler().set(FUNC(s6_state::switch_r));
+ m_pia30->set_port_a_input_overrides_output_mask(0xff);
m_pia30->writepb_handler().set(FUNC(s6_state::switch_w));
m_pia30->ca2_handler().set(FUNC(s6_state::pia30_ca2_w));
m_pia30->cb2_handler().set(FUNC(s6_state::pia30_cb2_w));