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Diffstat (limited to 'src/devices/cpu/z80/nsc800.cpp')
-rw-r--r--src/devices/cpu/z80/nsc800.cpp12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/devices/cpu/z80/nsc800.cpp b/src/devices/cpu/z80/nsc800.cpp
index d7af9a67fe2..e2c0bfd0087 100644
--- a/src/devices/cpu/z80/nsc800.cpp
+++ b/src/devices/cpu/z80/nsc800.cpp
@@ -54,17 +54,21 @@ void nsc800_device::execute_run()
void nsc800_device::execute_set_input(int inputnum, int state)
{
+ bool update_irq_attention = false;
switch (inputnum)
{
case NSC800_RSTA:
+ update_irq_attention = true;
m_nsc800_irq_state[0] = state;
break;
case NSC800_RSTB:
+ update_irq_attention = true;
m_nsc800_irq_state[1] = state;
break;
case NSC800_RSTC:
+ update_irq_attention = true;
m_nsc800_irq_state[2] = state;
break;
@@ -72,4 +76,12 @@ void nsc800_device::execute_set_input(int inputnum, int state)
z80_device::execute_set_input(inputnum, state);
break;
}
+
+ if (update_irq_attention)
+ {
+ if (m_nsc800_irq_state[0] != CLEAR_LINE || m_nsc800_irq_state[1] != CLEAR_LINE || m_nsc800_irq_state[2] != CLEAR_LINE)
+ set_service_attention<SA_NSC800_IRQ_ON, 1>();
+ else
+ set_service_attention<SA_NSC800_IRQ_ON, 0>();
+ }
}