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Diffstat (limited to 'src/mame/drivers/at.cpp')
-rw-r--r--src/mame/drivers/at.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/at.cpp b/src/mame/drivers/at.cpp
index f9be6d14151..140882956b7 100644
--- a/src/mame/drivers/at.cpp
+++ b/src/mame/drivers/at.cpp
@@ -657,7 +657,8 @@ void megapc_state::megapc(machine_config &config)
// on board devices
ISA16(config, m_isabus, 0);
- m_isabus->set_cputag("maincpu");
+ m_isabus->set_memspace(m_maincpu, AS_PROGRAM);
+ m_isabus->set_iospace(m_maincpu, AS_IO);
m_isabus->iochck_callback().set(m_wd7600, FUNC(wd7600_device::iochck_w));
m_isabus->irq2_callback().set(m_wd7600, FUNC(wd7600_device::irq09_w));
m_isabus->irq3_callback().set(m_wd7600, FUNC(wd7600_device::irq03_w));