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-rw-r--r--src/mame/drivers/vicdual.cpp5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/mame/drivers/vicdual.cpp b/src/mame/drivers/vicdual.cpp
index 913234b863c..9f0b944b5dc 100644
--- a/src/mame/drivers/vicdual.cpp
+++ b/src/mame/drivers/vicdual.cpp
@@ -1145,8 +1145,9 @@ WRITE8_MEMBER(vicdual_state::headonn_io_w)
{
// 7654---- unused?
// ----32-- always 1
- // ------1- 1 written after reset, then always 0
- // -------0 always 0
+ // ------10 palette bank (bit 0 inverted)
+
+ palette_bank_w(space, 0, (data & 3) ^ 1);
}
if (offset & 0x08) assert_coin_status();
}