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-rw-r--r--src/mame/misc/dynamoah.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/misc/dynamoah.cpp b/src/mame/misc/dynamoah.cpp
index 55b9f2e8ece..dc0872b97ba 100644
--- a/src/mame/misc/dynamoah.cpp
+++ b/src/mame/misc/dynamoah.cpp
@@ -81,7 +81,7 @@ void dynamoah_state::dynamoah(machine_config &config)
i80c31_device &maincpu(I80C31(config, "maincpu", 6'144'000)); // SC80C31BCCN40
// clock needs verification, being the XTAL value from a different board
maincpu.set_addrmap(AS_PROGRAM, &dynamoah_state::i8031_mem);
- maincpu.set_addrmap(AS_IO, &dynamoah_state::i8031_ext_mem);
+ maincpu.set_addrmap(AS_DATA, &dynamoah_state::i8031_ext_mem);
maincpu.port_in_cb<1>().set("eeprom", FUNC(eeprom_serial_93cxx_device::do_read)).lshift(7);
maincpu.port_in_cb<1>().append_constant(0x7f).mask(0x7f);
maincpu.port_out_cb<1>().set("eeprom", FUNC(eeprom_serial_93cxx_device::di_write)).bit(7);