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Diffstat (limited to 'src/mame/drivers/atarisy1.cpp')
-rw-r--r-- | src/mame/drivers/atarisy1.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mame/drivers/atarisy1.cpp b/src/mame/drivers/atarisy1.cpp index f39bd664a8c..0ca86d8b373 100644 --- a/src/mame/drivers/atarisy1.cpp +++ b/src/mame/drivers/atarisy1.cpp @@ -273,6 +273,9 @@ READ8_MEMBER(atarisy1_state::adc_r) WRITE8_MEMBER(atarisy1_state::adc_w) { + if (!m_adc.found()) + return; + m_adc->address_offset_start_w(space, offset & 7, 0); /* the A4 bit enables/disables joystick IRQs */ |