Table of Contents
Advertisement
TECHNICIAN SERIES
DIAGNOSTIC SERIES
------------
TANDY
COMPUTER
PRODUCTS
------------
- COC03VID/B1N -
COC03VID is designed
to test
the alpha
and graphic
modes of the Advanced
Color Video Chip (ACVC).
Another
feature
of this
test
displays
a cross
hatch
pattern,
which may be used to align
monitors.
To load this
diagnostic:
type
To execute
the test:
type
LOAD "COC03VID/B1N" and press
EXEC and press
(ENTER).
The test
begins
with a menu of tests,
as shown below:
(1)
=
ALPHA TEST,
(2)
=
GRAPHICS TEST,
(3)
=
CROSSHATCH,
(4) • EXIT to Basic.
(ENTER>.
Pressing
(1)
invokes
the Alpha Test
to test
the alpha modes of the Advanced
Color Video Chip (ACVC).
This test
fills
the screen
with different
characters
that
have different
attributes
to check all
of the alpha modes
(Attributes
affect
the foreground
and background
colors
of a character,
and
can cause
blinking
and underline).
The test
will
then cycle
through
all
the
alpha modes (32,
40, 64, 80 characters/line)
until
the <BREAK> key is hit,
at
which time it will
exit
the test
and go back to the menu.
Pressing
<2> invokes
the Graphics
mode test
of the ACVC chip.
This draws
color
bars
on the screen
and then cycles
through
the different
color
graphics
modes.
This test
runs continuously,
so press
<BREAK> to return
to the
menu.
Pressing
<3> invokes
the Crosshatch
feature,
which may be used for aligning
an RGB or composite
monitor.
Pressing
the <SPACE-BAR> will
toggle
the
display
between a crosshatch
display
(vertical
&
horizontal
lines)
and a dot
pattern
display.
Pressing
<BREAK> will
exit
the test
and return
to the
menu.
At the menu press
<4> exit
to Basic.
COLOR COMPUTER-3 DIAGNOSTICS
- 6 -
Advertisement
Table of Contents
Need help?
Do you have a question about the Color Computer 3 TRS-80 and is the answer not in the manual?