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7.10.2 Text Layer Functions
This section describes the character enhancement functions available in the text
layer.
Outlining
In both normal and closed-caption modes, writing a 1 to bit 9 (FRAME) of the
COL setting in the VRAM causes an outline to appear around all characters fol-
lowing that COL. You can specify the color of the outline in the FRAME register
(x'007FA2'). Figure 7-23 shows an example of character outlining. As shown in
the figure, if a character contains dots in the left or right borders of its field, the
outlining for those dots appear in the adjacent character field.
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Figure 7-23 Character Outlining Example
Character shadowing
In normal mode, writing a 1 to bit 10 (CSHAD) of the COL setting in the VRAM
causes a drop shadow to appear behind all characters following that COL. You
can specify the color of the shadow in the FRAME register (x'007FA2'). Figure
7-24 shows an example of character shadowing. As shown in the figure, if a
character contains dots in right border of its field, the shadowing for those dots
appear in the character field to the right.
16 dots
Figure 7-24 Character Shadowing Example
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On-Screen Display
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16 dots
MN102H75K/F75K/85K/F85K LSI User Manual
Setting Up the OSD
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16 dots
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