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-rw-r--r--src/devices/sound/okim6295.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/devices/sound/okim6295.cpp b/src/devices/sound/okim6295.cpp
index 78bf872af3d..ada0497a82b 100644
--- a/src/devices/sound/okim6295.cpp
+++ b/src/devices/sound/okim6295.cpp
@@ -35,6 +35,11 @@
???? abcd = one bit per voice, set to 0 if nothing is playing, or
1 if it is active
+ OKI Semiconductor produced this chip in two package variants. The
+ 44-pin QFP version, MSM6295GS, is the original one and by far the most
+ common. The 42-pin DIP version, MSM6295VRS, is missing A17 and RD,
+ which limits its ROM addressing to one megabit instead of two.
+
***************************************************************************/
#include "emu.h"