Color Attributes Subtest (80 x 25)The 80-column x 25-line color attributes subtest displays a pattern of 16 rows and 16 columns in 80-column by 25-line text mode. Each row has a hexadecimal number in a unique foreground color and each column has a unique background color. Where the same foreground and background color intersect, the hexadecimal number is not visible. Type y if each character is displayed correctly; otherwise, type n. Table 1 indicates the color in each of the rows and columns
Color Attributes Subtest (40 x 25)The 40-column x 25-line color attributes subtest is the same as the previous subtest except that the characters are displayed in 40-column by 25-line (double-wide) text mode. Type y if each character is displayed correctly; otherwise, type n. Color Bars SubtestThe color bars subtest displays 16 bars in different colors with background intensity enabled. Under each bar is the name of the color that should be displayed. Type y if each color bar is displayed correctly; otherwise, type n. Text Mode Pages TestThe Text Mode Pages Test checks the video subsystem’s ability to map and present all available video pages on the monitor screen, one page at a time. The test displays eight successive screens, the first of which contains 21 lines of 77 zeros. The remaining seven screens are identical to the first, except that each screen substitutes a different numeral (1 through 7) for the zeros. Type y if all the rows of numbers on each screen are displayed correctly; otherwise, type n. Figure 7 shows an example of the first of these screens. Figure 7. Text Mode Pages Test Screen
Graphics Mode TestThe Graphics Mode Test checks the video subsystem’s ability to present graphics mode data and colors. This test displays nine different screens, each of which allows you to check some aspect of graphics mode data and colors. The following subsections describe Graphics Mode Test screens in the order in which they appear.
320 x 200 Graphics Mode
Screens 320 x 200 Graphics Mode ScreensThe Graphics Mode Test displays two successive 320- x 200-pixel graphics mode screens: The first screen displays three pyramids in red, green, and yellow. The second screen displays three pyramids in magenta, cyan, and white. Type y if all the pyramids are the correct colors; otherwise, type n. 640 x 200 Black/White Graphics Mode ScreenThe 640- x 200-pixel black/white graphics mode screen displays a black rectangle and a white rectangle on a gray background. Type y if the boxes are displayed correctly; otherwise, type n. Figure 8 shows an example of this screen. Figure 8. 640 x 200 Black/White Graphics Mode Screen
640 x 480 Monochrome Graphics Mode ScreenThe 640- x 480-pixel monochrome graphics mode screen displays three chess pieces. Type y if all the chess pieces are identical and displayed correctly; otherwise, type n. Figure 9 shows an example of this screen. Figure 9. 640 x 480 Monochrome Graphics Mode Screen
320 x 200 16-Color Graphics Mode ScreenThe 320- x 200-pixel 16-color graphics mode screen displays a series of Xs in 16 different colors with the name of the color beneath each X. Type y if all the Xs are the correct colors; otherwise, type n. 640 x 200 16-Color Graphics Mode ScreenThe 640- x 200-pixel 16-color graphics mode screen displays a series of hexagons in 16 different colors with the name of the color beneath each hexagon. Type y if all the hexagons are the correct colors; otherwise, type n. 640 x 350 16-Color Graphics Mode ScreenThe 640- x 350-pixel 16-color graphics mode screen displays a series of octagons in 16 different colors with the name of the color displayed beneath each octagon. Type y if all the octagons are the correct colors; otherwise, type n. 640 x 480 2-Color Graphics Mode ScreenThe 640- x 480-pixel 2-color graphics mode screen displays three chess pieces. Type y if all the chess pieces are identical and displayed correctly; otherwise, type n. Figure 10 shows an example of this screen. Figure 10. 640 x 480 2-Color Graphics Mode Screen
640 x 480 16-Color Graphics Mode ScreenThe 640- x 480-pixel 16-color graphics mode screen displays a series of stars in 16 different colors with the name of the color beneath each star. Type y if all the stars are the correct colors; otherwise, type n. 320 x 200 256-Color Graphics Mode ScreenThe 320- x 200-pixel 256-color graphics mode screen displays a series of squares in 256 different color hues and intensities. Type y if all the squares are the correct colors; otherwise, type n. 640 x 480 256-Color Graphics Mode ScreenThe 640- x 480-pixel 256-color graphics mode screen displays a series of squares with two colors in each square. Type y if all the squares appear to be correct; otherwise, type n. 800 x 600 16-Color Graphics Mode ScreenThe 800- x 600-pixel 16-color graphics mode screen displays a series of pyramids in 16 different colors. Type y if all the pyramids appear to be correct; otherwise, type n. 800 x 600 256-Color Graphics Mode ScreenThe 800- x 600-pixel 256-color graphics mode screen displays a series of squares with four colors in each square. Type y if all the squares appear to be correct; otherwise, type n. 1024 x 768 16-Color Graphics Mode ScreenThe 1024- x 768-pixel 16-color graphics mode screen displays a series of hourglasses in 16 different colors. Type y if all the hourglasses appear to be correct; otherwise, type n. 1024 x 768 256-Color Graphics Mode ScreenThe 1024- x 768-pixel 256-color graphics mode screen displays a series of asterisks with four colors in each asterisk. Type y if all the asterisks appear to be correct; otherwise, type n. 1280 x 1024 16-Color Graphics Mode ScreenThe 1280- x 1024-pixel 16-color graphics mode screen displays a series of squares in 16 different colors located in various positions on the screen. Type y if all the squares appear to be correct; otherwise, type n. Color Palettes TestThe Color Palettes Test checks the video subsystem’s ability to display all available colors. The test displays two screens that allow you to check the quality of different shades of the basic colors and to test the monitor’s ability to vary the intensity of these colors. The first screen contains four sets of 64 squares, one for gray and one for each of the three basic colors (red, green, and blue). Each square contains a different shade of its associated color, ranging from very light to very dark. Type y if all the squares are the correct colors; otherwise type n. The second screen is the red/green/blue (RGB) color combination screen. This screen allows you to test the monitor’s ability to increase or decrease the intensity of the three basic colors. The RGB color combination screen displays an RGB box in the top center of the screen with individual red, green, and blue boxes beneath it. Underneath the individual color boxes are three lines that show the intensity of each color. Type r, g, or b to adjust the intensity of the corresponding color; then press the right-arrow key to increase the color intensity, or press the left-arrow key to decrease the intensity. The RGB box should be able to display 262,144 different colors when you adjust the intensity levels of red, green, and blue. Type y if all the squares are the correct colors; otherwise type n. Solid Colors TestThe Solid Colors Test checks whether the video subsystem is displaying the correct colors. This test also lets you check for missing pixels. When this test is running, four screens appear sequentially—a red screen, a green screen, a blue screen, and a white screen. Check each screen for missing pixels, and verify that the correct color is being displayed. When the test is complete, a message asks if you are satisfied with the quality of the colors. Type y if all the pixels were present and if the correct colors were displayed; otherwise, type n. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
