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-rw-r--r--src/mame/machine/sgi.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mame/machine/sgi.cpp b/src/mame/machine/sgi.cpp
index 1bbf910dc28..3ca3c2ca576 100644
--- a/src/mame/machine/sgi.cpp
+++ b/src/mame/machine/sgi.cpp
@@ -84,6 +84,10 @@ void sgi_mc_device::device_start()
{
m_sys_id = 0x11; // rev. B MC, EISA bus present
}
+ else
+ {
+ m_sys_id = 0x01; // rev. B MC, no EISA bus
+ }
m_rpss_timer = timer_alloc(TIMER_RPSS);
m_rpss_timer->adjust(attotime::never);