Tandy 1000
Video System Modes
Display Modes
Technical Reference Manual
The video circuitry
is
designed to operate with three types of display devices:
a standard
TV
using
an
optional
RF
modulator, a composite monitor and
an
RGBI
color monitor.
To
support these different display types, both a composite
video output and a 9-pin
RGBI
connector are provided.
The video display system
is
very flexible and can be programmed for a number
of video modes. These modes use varying numbers of colors
(2,
4,
or
16).
These 16 colors are defined by combinations of the RGBI as shown
in
the col-
or chart below and can be used for foreground, background, and character
blinking.
If
you are using a black and white monitor. (These colors will appear
as shades of gray for use
as
reverse video, highlighting, and blinking.)
In
ad-
dition any 1 of the 16 colors or shades of gray can be used for the screen
border.
Color I R
G
B
Black
0 0 0 0
Blue 0 0 0
1
Green 0 0
1
0
Cyan 0 0 1 1
Red 0
1
0 0
Magenta 0 1
0
1
Brown
0 1 1
0
Light Gray 0
1
1 1
Dark Gray 1 0 0 0
Light Blue
1
0 0
1
Light Green 1 0 1 0
Light Cyan
1
0 1 1
Pink 1 1
0 0
Light Magenta 1 1
0 1
Yellow
1 1 1 0
White 1 1
1
1
Available Colors Table
45
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