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diff --git a/specs/freevga/vga/seqplanr.txt b/specs/freevga/vga/seqplanr.txt
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+++ b/specs/freevga/vga/seqplanr.txt
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+                          Planar Shift Mode Diagram
+                          -------------------------
+
+       Pixel Value                           Display Memory
+
+   3     2     1     0         7     6     5     4     3     2     1     0
++-----+-----+-----+-----+   +-----+-----+-----+-----+-----+-----+-----+-----+
+|.....|.....|.....|.....|___|.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
+|.....|.....|.....|.....|   |.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
++-----+-----+-----+-----+   +-----+-----+-----+-----+-----+-----+-----+-----+
+   |     |     |     Plane 0   |     |     |     |     |     |     |     |
+   |     |     |            +-----+-----+-----+-----+-----+-----+-----+-----+
+   |     |     |____________|.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
+   |     |           Plane 1|.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
+   |     |                  +-----+-----+-----+-----+-----+-----+-----+-----+
+   |     |                     |     |     |     |     |     |     |     |
+   |     |                  +-----+-----+-----+-----+-----+-----+-----+-----+
+   |     |__________________|.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
+   |                 Plane 2|.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
+   |                        +-----+-----+-----+-----+-----+-----+-----+-----+
+   |                           |     |     |     |     |     |     |     |
+   |                        +-----+-----+-----+-----+-----+-----+-----+-----+
+   |________________________|.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
+                     Plane 3|.....|%%%%%|:::::|%%%%%|:::::|%%%%%|:::::|%%%%%|
+                            +-----+-----+-----+-----+-----+-----+-----+-----+
+                               |     |     |     |     |     |     |     |
+                                 
+                     Pixel:    0     1     2     3     4     5     6     7
+
+                                      <--------  Direction of Shift 
+