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CRT Unit
TextAttr Variable
DECLARATION: TextAttr : Byte;
PURPOSE: Sets the current Text color attributes
REMARKS: The Text colors are normally selected with calls to
TextColor and/or TextBackground. Alternatively, you may
store the attributes directly into TextAttr.
The TextAttr bits are stored as follows:
7 6 5 4 3 2 1 0
+-------------------------------+
| B | b b b | f f f f |
+-------------------------------+
where B is the blink enable bit, ffff is the 4-bit
foreground color, and bbb is the 3-bit background color.
If you use the Color Constants to create the values for
TextAttr, the background color can only be selected from
the first 8 colors and must be multiplied by 16 to get it
into the correct bit positions.
EXAMPLE: TextAttr := Yellow + Blue * 16 + Blink;
This will result in yellow blinking characters on a blue
background.
See Also:
TextColor
TextBackground
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Written by Dave Pearson