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-rw-r--r--src/mame/drivers/sg1000a.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/sg1000a.cpp b/src/mame/drivers/sg1000a.cpp
index f358e2a8ef0..1db3b195687 100644
--- a/src/mame/drivers/sg1000a.cpp
+++ b/src/mame/drivers/sg1000a.cpp
@@ -551,4 +551,4 @@ DRIVER_INIT_MEMBER(sg1000a_state,sg1000a)
GAME( 1984, chboxing, 0, sg1000a, chboxing, sg1000a_state, sg1000a, ROT0, "Sega", "Champion Boxing", 0 )
GAME( 1985, chwrestl, 0, sg1000ax, chwrestl, sg1000a_state, sg1000a, ROT0, "Sega", "Champion Pro Wrestling", 0 )
GAME( 1985, dokidoki, 0, sg1000a, dokidoki, sg1000a_state, sg1000a, ROT0, "Sega", "Doki Doki Penguin Land", 0 )
-GAME( 198?, sderby2, 0, sderby2, sderby2, sg1000a_state, sg1000a, ROT0, "Sega", "Super Derby II (Satellite board)", 0 )
+GAME( 198?, sderby2, 0, sderby2, sderby2, sg1000a_state, sg1000a, ROT0, "Sega", "Super Derby II (Satellite board)", MACHINE_NOT_WORKING ) // inputs aren't hooked up, probably needs to be connected to the main board anyway