diff --git a/src/mame/drivers/system16.cpp b/src/mame/drivers/system16.cpp
index cc28c11e0ef..c1b48641ed0 100644
--- a/src/mame/drivers/system16.cpp
+++ b/src/mame/drivers/system16.cpp
@@ -3125,6 +3125,16 @@ ROM_START( dduxbl )
 
 	ROM_REGION( 0x10000, "soundcpu", 0 ) /* sound CPU */
 	ROM_LOAD( "dduxb01.bin", 0x0000, 0x8000, CRC(0dbef0d7) SHA1(8b9afb2fcb946cec467b1e691c267194b503f841) )
+		
+	/* stuff below isn't used but loaded because it was on the board .. */
+	ROM_REGION( 0x0200, "proms", 0 )
+	ROM_LOAD( "dduxb_5_82s129.b1",  0x0000, 0x0100, CRC(a7c22d96) SHA1(160deae8053b09c09328325246598b3518c7e20b) )
+	ROM_LOAD( "dduxb_4_18s030.a17", 0x0100, 0x0020, CRC(58bcf8bd) SHA1(e4d3d179b08c0f3424a6bec0f15058fb1b56f8d8) )
+
+	ROM_REGION( 0x0600, "plds", 0 )
+	ROM_LOAD( "dduxb_pal16l8.1",     0x0000, 0x0104, CRC(3b406587) SHA1(76f875879fb041c39fb5e6527c0d3ab98b66e36e) )
+	ROM_LOAD( "dduxb_p_gal16v8.a18", 0x0200, 0x0117, CRC(ce1ab1e1) SHA1(dcfc0015d8595ee6cb6bb02c95655161a7f3b017) )
+	ROM_LOAD( "dduxb_pal20l8.2",     0x0400, 0x0144, CRC(09098fbe) SHA1(ea251bbcc140b2c69a155bf2fc046c57b206335b) )
 ROM_END