Deck 16: Bios-Level Programming Assessment

Question 1

In text mode,each character is assigned a separate attribute byte that determines its color.

Answer 1

True

Question 2

The BIOS data area includes the current video mode.

Answer 2

True

Question 3

INT 16h permits characters to be redirected,so input can be read from a file.

Answer 3

False

Question 4

The fastest way to write characters to the video display is by calling INT 10h.

Question 5

When a key is pressed at the keyboard,the keyboard controller chip produces an 8-bit scan code and sends it to the keyboard port.

Question 6

Keys stored in the keyboard typeahead buffer can only be retrieved by calling INT 16h.

Question 7

MS-Windows cannot run MS-DOS programs in full-screen mode.

Question 8

Memory-mapped graphics in Mode 13h permits 128 different integer values for each color.

Question 9

The BIOS data area includes the keyboard typeahead buffer.

Question 10

The default MS-DOS video display is 80 columns by 25 rows.

Question 11

INT 10h function 9 displays a character and attribute at the current cursor position.

Question 12

Character colors use 4 bits for the foreground color,and 4 bits for the background color.Blinking is controlled by a 9th bit that is not part of the attribute byte.

Question 13

If you mix the colors red and green in the same attribute byte and set the intensity bit to 1,the resulting color is yellow.

Question 14

INT 16h provides a way to inspect the keyboard buffer without actually removing a key.

Question 15

The INT 8h service routine retrieves the keyboard scan code and looks up the corresponding ASCII code.