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-rw-r--r--src/frontend/mame/luaengine.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/frontend/mame/luaengine.cpp b/src/frontend/mame/luaengine.cpp
index 1bdc3582fef..34d9c769338 100644
--- a/src/frontend/mame/luaengine.cpp
+++ b/src/frontend/mame/luaengine.cpp
@@ -1219,7 +1219,7 @@ void lua_engine::initialize()
* port:active() - get port status
* port:live() - get port ioport_port_live (TODO: not usable from lua as of now)
* port:read() - get port value
- * port:write(val, mask) - set port to value & mask
+ * port:write(val, mask) - set port to value & mask (output fields only, for other fields use field:set_value(val))
* port:field(mask) - get ioport_field for port and mask
* port.field[] - get ioport_field table
*/