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Microprocessors > Notes in Assembly Language > Flashcards

Notes in Assembly Language Flashcards

1
Q

How many columns does a typical video screen have

A

80

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2
Q

How many rows does a typical video screen have?

A

25

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3
Q

Code for clearing screen

A

MOV AX,3
INT 10H

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4
Q

MOV AH,0 (0000)

A

Video Mode

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5
Q

MOV AH,1 ;(0100)

A

Single Character Input

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6
Q

MOV AH,2 ;(0200)

A

Single Character Output

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7
Q

MOV AH,6 ;(0600)

A

Monitor Screen Processing

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8
Q

MOV AH,8 ;(0800)

A

Single Character Input No Echo

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9
Q

MOV AH,9 ;(0900)

A

String Output

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10
Q

MOV AH,10 ;(0A00)

A

String Input

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11
Q

How many colors can background display?

A

8

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12
Q

How many colors can be used as text color?

A

16

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13
Q

What does the msb of the background color represent?

A

Blinking

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14
Q

What does the msb of the text color represent?

A

Intensity

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15
Q

Is used to compare character data, as well as, numeric data fields

A

CMP

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16
Q

The main use is in decision making in conjunction with conditional jump instructions

A

CMP

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17
Q

These are instructions that transfer control depending on the setting of CMP instruction whether a certain condition is met or not.

A

Conditional Jump

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18
Q

Is considered an unconditional jump instruction because the machine always executes it

A

JMP

19
Q

Make it possible to break a large program down into smaller pieces so that each piece can be shown to work correctly without reference to any of the others

A

Procedure

20
Q

Used for filling in time or filling space on tape when there is no data

A

NUL (null)

21
Q

Used when there is need to call human attention

A

BEL (bell)

22
Q

Indicates that the code combinations, which follow, shall be interpreted as outside of the standard character set until SHIFT IN character is reached

A

SO (Shift Out)

23
Q

Used to obliterate unwanted characters

A

DEL (delete)

24
Q

A nonprinting used to separate words, or to move the printing mechanism or display cursor forward by one position

A

SP (space)

25
Q

A character which shall change the meaning of one or more contiguously following characters.

A

DLE (Data Link Escape)

26
Q

It can provide supplementary controls, or permits the sending of data characters having any bit combination

A

DLE (Data Link Escape)

27
Q

Character for the control of auxiliary devices or special terminal features

A

Device Controls

28
Q

Indicates that the data which precedes it in message or black, should be disregarded

A

CAN (cancel)

29
Q

Indicates the physical end card, tape or other medium, or the end of the required or used portion of the medium

A

EM (End of Medium)

30
Q

Substitute for a character that is found to be erroneous or invalid

A

SUB (Substitute)

31
Q

A character intended to provide code extension in that it gives a specified number of continuously following characters an alternate

A

ESC (Escape)

32
Q

Indicates movement of the printing mechanism or display cursor backwards one position

A

BS (Backspace)

33
Q

Indicates movement of the printing mechanism or display cursor to the next pre assigned “tab” or stopping position

A

HT (Horizontal Tab)

34
Q

Indicates movement of the printing mechanism or display cursor to the start of the next line

A

LF (Line Feed)

35
Q

Indicates movement of the printing mechanism or display cursor to the next series of pre-assigned printing lines

A

VT (Vertical Tab)

36
Q

Indicates movement of the printing mechanism or display cursor to the starting position of the next page, form or screen

A

FF (Form Feed)

37
Q

Indicates movement of the printing mechanism or display cursor to the starting position of the same line

A

CR (Carriage Return)

38
Q

Used to indicate the start of a heading, which may contain address or routing information

A

SOH (Start of Heading)

39
Q

Used to indicate the start of the text and also indicates the end of the heading

A

STX (Start of Text)

40
Q

Used to terminate the text, which was started was started with STX

A

ETX (End of Text)

41
Q

Indicates the end of a transmission, which included one or more “text’s” with their headings

A

EOT (End of Transmission)

42
Q

A request for a response from a remote station

A

ENQ (Enquiry)

43
Q

A character transmitted by a receiving device as an affirmation response to sender

A

ACK (Acknowledgement)

44
Q

A character transmitted by a receiving device as a negative response to polling messages

A

NAK (Negative Acknowledgement)

Microprocessors (28 decks)

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