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SECTION 4 VISUAL DISPLAY: SOFTWARE CONTROL
4.1 GENERAL
Under normal circumstances the Visual Display will be under the
control of the M-THREE's monitor firmware. However, it is possible
for software to manipulate certain display functions e.g. absolute
Cursor positioning and partial line erasure etc., by the use of escape
sequences.
4.2 ESCAPE SEQUENCES
4.2.1
Erase Screen (ESC E)
Erase all data from the screen and position the cursor at
the 'HOME' position.
4.2.2
Erase End-Of-Screen (ESC J)
The contents of the display from the current cursor
position to the end of screen will be cleared. The cursor
position will not be affected.
4.2.3
Erase Line (ESC X)
The row of the current cursor position is cleared and the
cursor is moved to the first column.
4.2.4
Erase End-Of-Line (ESC K)
The contents of the display from the current cursor
position to the end of line will be cleared. The cursor
position will not be affected.
4.2.5
Cursor Up (ESC A)
The cursor will move up one row non-destructively. If
the cursor is in the top row of the screen, it will wrap
around to the last row.
4.2.6
Cursor Down (ESC B)
The cursor will move down one row non-destructively. If
the cursor is in the last row of the screen, it will wrap
around to the first row.
4.2.7
Cursor Right (ESC C)
The cursor will move right one column non-destructively.
If the cursor is in the last column, it will wrap around to
the first column of the same row.
4.2.8
Cursor Left (ESC D)
The cursor will move left one column non-destructively.
If the cursor is in the first column, it will wrap around to
the last column of the same row.
4-1
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