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-rw-r--r--src/mame/drivers/laserbat.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mame/drivers/laserbat.cpp b/src/mame/drivers/laserbat.cpp
index 3ba7b7018f1..58d0fd3f464 100644
--- a/src/mame/drivers/laserbat.cpp
+++ b/src/mame/drivers/laserbat.cpp
@@ -65,6 +65,8 @@
* The sprite ROM is twice the size as Laser Battle with the bank
selected using bit 9 of the 16-bit sound interface (there's a wire
making this connection visible on the component side of the PCB)
+ * If demo sounds are enabled (using DIP switches), background music
+ is played every sixth time through the attract loop
* Sound board emulation is based on tracing the program and guessing
what's connected where - we really need someone to trace out the
1b11107 sound board if we want to get this right