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TECHNICIAN SERIES
DIAGNOSTIC SERIES
-------------
TANDY
COMPUTER
PRODUCTS
-------------
- COLORS64/BIN -
COLORS64 is a menu driven
program,
which allows
the technician
to ensure
that
all
64 colors
of the Advanced Color Video Chip (ACVC) are displayed.
To load COLORS64:
To execute
it:
type
type
LOAD "COLORS64/BIN" and
press
(ENTER).
EXEC and then press
(ENTER>.
The program will
then display
the menu of tests
available:
<l>
=
RBG monitor
test,
<2>
=
CMP monitor
test,
<3>
=
Exit
to Basic.
This program uses
interrupts,
so run the interrupt
tests
(IRQTST and
FRQTST) to ensure
that
the interrupts
are functioning
properly.
A joystick
must be plugged
into
the right
joystick
port
for this
test.
Pressing
<1) invokes
the RGB test,
which programs
the color
palette
registers
for an RGB video monitor,
then displays
all
64 colors
on the
screen
in a grid
pattern.
Use the joystick
to move the cursor
over one of
the blocks
in the grid.
The background
color
of the screen
will
change
to
the color
of the block under the joystick
cursor.
Press
the fire
button
of
the joystick
to change
the border
color
of the screen
to the same as is
under the joystick
cursor.
Since
this
test
loads
the palettes
with RGB
values,
it is incompatible
with composite
video monitors.
Press
<BREAK> to exit
to the menu.
Pressing
<2> invokes
the CMP test,
which programs
the color
palette
registers
for a composite
video monitor,
then displays
all
64 colors
on the
screen.
These colors
are displayed
in rows.
Using the joystick,
move the
joystick
cursor
over one of these
color
blocks,
and press
the fire
button
of
the joystick
to change the border
color
of the screen.
Since this
test
loads
the palettes
with composite
values,
it
is incompatible
with RGB video
monitors.
Press
<BREAK) to exit
to the menu.
At the menu press
(3) exit
to Basic.
COLOR COMPUTER-3 DIAGNOSTICS
- 5 -
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