Tandy Color Computer 3 TRS-80 User Manual

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
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Tandy Color Computer 3 TRS-80 Specifications

General

Brand	Tandy
Model	Color Computer 3 TRS-80
Category	Desktop
Language	English