Radio Shack CCR-81 Technical Reference Manual

FULL
GRAPHIC
MODES
-
There
are
eight full
graphic
modes
available
from
the
VDG.
These
modes
require
1Kto
6K
bytes
of
memory.
The
eight
full-graphic
modes include
an outside
color
border
in one of
two
colors
depending
upon
the
color
set
select
pin
(CSS). The
CSS
pin (pin
39) selects one
of
two sets
of four
colors
in the four
color
graphic
modes.
The
64 x
64 Color
Graphics
mode
generates
a display
matrix
of
64 elements
wide by
64
elements
high.
Each
element
may
be
one
of
four
colors.
A
1K x 8
display
memory
is required.
Each
pixel
equals four
dot -clocks
by
three
scan lines.
The
128 x
64 Graphics
Mode
generates
a matrix
128
elements
wide
by
64 elements
high.
Each
element
may be
either
ON
or
OFF.
However,
the
entire
display
may be
one
of two
colors,
selected
by
using
the color
set
select
pin.
A 1K
x 8 display
memory
is
required.
Each pixel
equals
two
dot-clocks
by
three
scan
lines.
The
128 x
64 Color
Graphics
mode
generates
a display
matrix
128 elements
wide
by
64 elements
high.
Each
element
may
be
one
of
four
colors.
A
2K x
8 display
memory
is
required.
Each'
pixel
equals
two
dot-clocks
by three
scan
lines.
The
128 x
96 Graphics
mode
generates
a display
matrix
128
elements
wide
by
96 elements
high.
Each
element
may be
either
ON or
OFF.
However,
the
entire
display
may be
one of
two
colors
selected
by
using
the
color
select
pin.
A
2K x 8
display
memory
is
required.
Each
pixel
equals
two
dot-clocks
by two
scan lines.
The
128
x
96 Color
Graphics
mode
generates
a display
128
elements
wide
by
96 elements
high.
Each
element
may
be
one
of
four
colors.
A
3K x
8 display
memory
is
required.
Each
pixel
equals
two
dot-clocks
by two
scan
lines.
The
128 x
192
Graphics
mode
generates
a
display
matrix
128
elements
wide
by
192
elements
high.
Each
element
may
be
either
ON or
OFF,
but
the
ON elements
may
be
one of
two
colors
selected
with
color
set
select
pin.
A 3K
x 8
display
memory
is required.
Each
pixel
equals
two
dot-clocks
by
one
scan
line.
The
128 x
192
Color
Graphics
mode
generates
a display
128
elements
wide
by
192
elements
high.
Each
element
may
be
one
of four
colors.
A 6K
x 8 display
memory
is
required.
A
detailed
description
of
the VDG
modes
is
given
in
Table
2.
Each
pixel
equals
two
dot-clocks
by one
scan line.
The
256 x
192
Graphics
mode
generates
a
display
256
elements
wide
by
192
elements
high.
Each
element
may be
either
ON or
OFF,
but the
ON
element
may be
one of
two
colors
selected
with
the
color
set
select pin.
A 6K
x8 display
memory
is
required.
Each
pixel
equals
one
dot-clock
by one
scan
line.
23

Radio Shack CCR-81 Specifications

General

Brand	Radio Shack
Model	CCR-81
Category	Desktop
Language	English