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VIDEO RESOLUTION
The
combination
of
HRES and CRES bits determine
the
resolution of
the screen.
The following
resolutions
are supported:
Alphanumerics:
BP =
0,
CoCo
=
RES Bit
Mode
32
character
40
character
80
character
HRES2
HRES1
HRESO
CRES1
CRESO
1
1
1
Graphics: BP
=
1
,
CoCo
=
Pixels
Colors
HRES2
HRES1
HRESO
CRES1
CRESO
640
4
1
I
1
640
2
1
512
4
1
1
512
2
320
16
1
1
1
320
4
1
1
256
16
1
1
256
4
1
256
2
1
160
16
1
1
1
In
addition
to
the
above modes, the previous CoCo modes are available.
COLOR COMPUTER MODE SELECTION
MC6883
(SAM)
DISPLAY MODE
REG. FF22
V2
VI
V0
7
6
5
4
3
Alphanumerics
X
X
CSS
Alphanumerics Inverted
X
X
CSS
Semigraphics
-
4
X
X
X
64 X 64
Color Graphics
1
CSS
128 X 64
Graphics
1
1
CSS
128
X
64 Color
Graphics
1
1
CSS
128
X
96
Graphics
1
1
1
1
CSS
128
X
96
Color Graphics
1
1
CSS
128
X
192
Graphics
1
1
1
1
CSS
128
X
192
Color Graphics
1
1
1
1
CSS
256
X
192
Graphics
1
1
1
1
1
CSS
-18-
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