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-rw-r--r--src/mame/machine/rmnimbus.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mame/machine/rmnimbus.cpp b/src/mame/machine/rmnimbus.cpp
index 669e7e3b142..92d67f4bdf0 100644
--- a/src/mame/machine/rmnimbus.cpp
+++ b/src/mame/machine/rmnimbus.cpp
@@ -191,7 +191,7 @@ void rmnimbus_state::external_int(uint8_t vector, bool state)
uint8_t rmnimbus_state::cascade_callback()
{
m_maincpu->int0_w(0);
- return m_vector;
+ return !m_vector ? m_z80sio->m1_r() : m_vector;
}
void rmnimbus_state::machine_reset()
@@ -987,7 +987,7 @@ WRITE_LINE_MEMBER(rmnimbus_state::sio_interrupt)
if(LOG_SIO)
logerror("SIO Interrupt state=%02X\n",state);
- external_int(m_z80sio->m1_r(), state);
+ external_int(0, state);
}
/* Floppy disk */