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Diffstat (limited to 'src/mame/drivers/mtx.cpp')
-rw-r--r--src/mame/drivers/mtx.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mame/drivers/mtx.cpp b/src/mame/drivers/mtx.cpp
index 1ca48a8e2f3..e322d4ab9c2 100644
--- a/src/mame/drivers/mtx.cpp
+++ b/src/mame/drivers/mtx.cpp
@@ -338,6 +338,8 @@ void mtx_state::mtx512(machine_config &config)
/* rs232 board with disk drive bus */
MTX_EXP_SLOT(config, m_exp, mtx_expansion_devices, nullptr);
+ m_exp->set_program_space(m_maincpu, AS_PROGRAM);
+ m_exp->set_io_space(m_maincpu, AS_IO);
m_exp->int_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
m_exp->nmi_handler().set_inputline(m_maincpu, INPUT_LINE_NMI);
m_exp->busreq_handler().set_inputline(m_maincpu, Z80_INPUT_LINE_BUSRQ);