Radio Shack CCR-81 Technical Reference Manual

The
following
tables
present
mode
programming
information,
a
detailed
description
of the
display
modes, and
the
display
character set.
TABLET.
MODE
SELECTION
MC6883
PIA
REGISTER
BITS
DATA ALPHA/GRAPHIC
DISPLAY
MODE
HEX
BITS
MODE
SELECTED
REGISTERS
ADDRESS
(FF22)
v
2
v,
v 7
6
5 4 3 2
1
7 6
X
X CSS
N
N N
Alphanumerics
X
X
CSS
N
N N 1
Alphanumerics
Inverted
X X
X N
N
N 1
X
Seriographies
-
4
X
X 1 CSS
N
N N
1
X
Semigraphics
-
6
1
X
X
X N
N N
1
X
Semigraphics
-
8
1
X X
X N
N N
1 X
Semigraphics
-
12
1 1
X X
X N
N N 1
X
Semigraphics
-
24
1
CSS
N
N N
X X
64
x 64
Color Graphics
1
1 CSS
N N
N X
X
128x 64
Graphics
1
1 CSS
N
N N X
X
128x64
Color
Graphics
1 1
1 1 CSS
N
N N X
X
128x96
Graphics
1
1
CSS
N N
N X
X
128x96 Color
Graphics
1
1
1
1
CSS
N
N N
X X
128 x 192
Graphics
1 1
1
1 CSS
N
N N
X X
128 x 192
Color
Graphics
1
1
1
1 1 CSS
N N N
X
X
256 x 192
Graphics
X=
DON'T
CARE
N
=
DO
NOT
CHANGE
24

Radio Shack CCR-81 Specifications

General

Brand	Radio Shack
Model	CCR-81
Category	Desktop
Language	English