VDU 20

Restores the default colours and palette.

VDU 20

Syntax	VDU 20
Keyboard equivalent	CTRL T
Character stream (hex)	14
Description	Reprograms the palette to the default for the current MODE. Resets the current text and graphics colours to the defaults. Resets the graphics paint modes to the defaults.

Description

VDU 20 resets the colour scheme to the one that was set up when the current screen MODE was selected.

It has no effect in MODE 7 which is a Teletext mode. In the other modes, the logical colours of items already on screen are not affected by VDU 20.

• The palette is set to the default, according to the number of colours in the current MODE (see the tables below). The set of actual colours on screen instantly changes to the default set.
• The text foreground colour is set to the logical colour for white. Text printed after VDU 20 will appear in this colour.
• The text background colour is set to the logical colour for black.
• The graphics foreground colour is set to the logical colour for white, and the foreground paint mode is set to 'overwrite'.
• The graphics background colour is set to the logical colour for black, and the background paint mode is set to 'overwrite'.

Default palettes

Default palette for two-colour MODEs

Logical colour	Actual colour
0	Black
1	White

Default palette for four-colour MODEs

Logical colour	Actual colour
0	Black
1	Red
2	Yellow
3	White

Default palette for sixteen-colour MODEs

Logical colour	Actual colour
0	Black
1	Red
2	Green
3	Yellow
4	Blue
5	Magenta
6	Cyan
7	White
8	Flashing black/white
9	Flashing red/cyan
10	Flashing green/magenta
11	Flashing yellow/blue
12	Flashing blue/yellow
13	Flashing magenta/green
14	Flashing cyan/red
15	Flashing white/black

-- beardo 21:58, 10 November 2007 (UTC)