diff options
Diffstat (limited to 'src/devices/cpu/z80/nsc800.cpp')
-rw-r--r-- | src/devices/cpu/z80/nsc800.cpp | 12 |
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>(); + } } |