Terminals have 5 distinct monochrome display attributes. They are as follows:
| NORMAL REVERSE UNDERLINE HIGH_INT BLINK |
Each of these monochrome physical attribute names is mapped to an attribute code. The attribute code in turn is mapped to a control sequence. The control sequence that it is mapped to depends on the information contained in the vvtermcap entry for each type of terminal.
Warning: Do not attempt to modify these states with video attribute modifiers.
