diff --git a/hash/videopac.xml b/hash/videopac.xml
index 078f17f5fe6..5badbd7fc39 100644
--- a/hash/videopac.xml
+++ b/hash/videopac.xml
@@ -17,9 +17,10 @@ TODO:
 - add rom names from pcbs (lack of)
 - add serials for radiola and jopacs
 
-Undumped:
+Undumped (or dumped but not public):
 - Spaans          (spanish to dutch translator)
 - Crazy Horses
+- Des Chiffres et des Lettres
 - misc. homebrew cartridges
 
 Protos:
@@ -69,6 +70,7 @@ There is an Odyssey³ Command Center Voice Module, could be differences to relea
 
 Europe:
 - Melrep
+- G7400 service test cartridge
 
 Do Videopac+/Odyssey3 versions exist?:
 - Syracuse (France)
diff --git a/src/mame/drivers/mrdo.cpp b/src/mame/drivers/mrdo.cpp
index bf195f52aa6..de2fe93b70f 100644
--- a/src/mame/drivers/mrdo.cpp
+++ b/src/mame/drivers/mrdo.cpp
@@ -16,9 +16,9 @@ VBlank duration: 1/VSYNC * (70/262) = 4457 us
 The manual for this model clearly shows above values in 'Misc' parts listings.
 There's a chance that certain bootlegs might have the different 8/20 MHz XTALS.
 
-Sound chips have custom label "8106", the original label was scratched off.
-They are presumedly SN76489. Note that Lady Bug's PCB S/N is also 8106 and
-has the same sound chips.
+Sound chips have custom label "U8106". Or "8106" or unlabeled with the original
+label scratched off. They are presumedly SN76489. Note that Lady Bug's PCB S/N
+is also 8106 and has the same sound chips.
 
 ***************************************************************************/