diff --git a/src/devices/video/imagetek_i4100.cpp b/src/devices/video/imagetek_i4100.cpp
index b3813d88c25..1897f5951fc 100644
--- a/src/devices/video/imagetek_i4100.cpp
+++ b/src/devices/video/imagetek_i4100.cpp
@@ -13,6 +13,15 @@
     - inputs for i4300;
     - hyprduel.cpp uses scanline attribute which crawls to unusable state
       with current video routines here;
+ 	- CRT Controller, also understand why it needs so many writes before actual parameters;
+	- Wrong color bars in service mode (e.g. balcube, toride2g). They use solid color tiles (80xx), 
+	  but the right palette is not at 00-ff.
+	  Related to the unknown table in the RAM mapped just before the palette?
+	  Update: the colors should have a common bank of 0xb (so 0x8bxx), it's unknown why the values 
+	  diverges, the blitter is responsible of that upload fwiw;
+    - Some gfx problems in ladykill, 3kokushi, puzzli, gakusai, seem related to how we handle 
+	  windows, wrapping, read-modify-write areas;
+	- puzzli: emulate hblank irq and fix video routines here (water effect not emulated?);
 
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