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-rw-r--r--src/mame/drivers/cinemat.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mame/drivers/cinemat.cpp b/src/mame/drivers/cinemat.cpp
index 97c2d0a9c15..364e38b3533 100644
--- a/src/mame/drivers/cinemat.cpp
+++ b/src/mame/drivers/cinemat.cpp
@@ -323,7 +323,9 @@ static ADDRESS_MAP_START( io_map, AS_IO, 8, cinemat_state )
ADDRESS_MAP_END
static ADDRESS_MAP_START( io_map_qb3, AS_IO, 8, cinemat_state )
+ // Some of the outputs here are definitely not mapped through the LS259, since they use multiple bits of data
AM_RANGE(0x00, 0x00) AM_WRITE(qb3_ram_bank_w)
+ AM_RANGE(0x04, 0x04) AM_WRITE(qb3_sound_fifo_w)
AM_RANGE(0x0f, 0x0f) AM_READ(qb3_frame_r)
AM_IMPORT_FROM(io_map)
ADDRESS_MAP_END