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Diffstat (limited to 'src/mame/drivers/s11c.cpp')
-rw-r--r--src/mame/drivers/s11c.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mame/drivers/s11c.cpp b/src/mame/drivers/s11c.cpp
index b34e7a3fe88..a31d8ca2d48 100644
--- a/src/mame/drivers/s11c.cpp
+++ b/src/mame/drivers/s11c.cpp
@@ -164,6 +164,7 @@ void s11c_state::s11c(machine_config &config)
/* Devices */
PIA6821(config, m_pia21, 0);
m_pia21->readpa_handler().set(FUNC(s11_state::sound_r));
+ m_pia21->set_port_a_input_overrides_output_mask(0xff);
m_pia21->writepa_handler().set(FUNC(s11_state::sound_w));
m_pia21->writepb_handler().set(FUNC(s11_state::sol2_w));
m_pia21->ca2_handler().set(FUNC(s11_state::pia21_ca2_w));
@@ -180,6 +181,7 @@ void s11c_state::s11c(machine_config &config)
PIA6821(config, m_pia28, 0);
m_pia28->readpa_handler().set(FUNC(s11_state::pia28_w7_r));
+ m_pia28->set_port_a_input_overrides_output_mask(0xff);
m_pia28->writepa_handler().set(FUNC(s11a_state::dig0_w));
m_pia28->writepb_handler().set(FUNC(s11b_state::dig1_w));
m_pia28->ca2_handler().set(FUNC(s11_state::pia28_ca2_w));
@@ -195,6 +197,7 @@ void s11c_state::s11c(machine_config &config)
PIA6821(config, m_pia30, 0);
m_pia30->readpa_handler().set(FUNC(s11_state::switch_r));
+ m_pia30->set_port_a_input_overrides_output_mask(0xff);
m_pia30->writepb_handler().set(FUNC(s11_state::switch_w));
m_pia30->cb2_handler().set(FUNC(s11_state::pia30_cb2_w));
m_pia30->irqa_handler().set(FUNC(s11_state::pia_irq));