𝘌𝘯𝘥 𝘰𝘧 𝘊𝘩𝘢𝘱𝘵𝘦𝘳 𝘚𝘶𝘮𝘮𝘢𝘳𝘪𝘦𝘴

Question 1

What are the three types of unconditional jump instructions?

Answer 1

short, near, far, wherever you are

Question 2

allows a branch to within +127 and -128 bytes

Answer 2

Short Jump

Question 3

allows a jump to any location in the current code segment

Answer 3

Near Jump

Question 4

allows a jump to any location in the memory system

Answer 4

Far Jump

Question 5

Whenever a label appears with a JMP instruction or conditional jump, the label, must be followed by a ______

Answer 5

Colon

Question 6

The _____ that follows a short or near jump is the distance from the next instruction to the jump location.

Answer 6

Displacement

Question 7

jump to the location stored in a memory word

Answer 7

Near Indirect Jump

Question 8

jump to the location stored in a memory doubleword

Answer 8

Far Indirect Jump

Question 9

Are all short jumps that test one or more of the flag bits

Answer 9

Conditional Jumps

Question 10

A special conditional jump instruction that decrements CX and jumps to the label when CX is not 0.

Answer 10

LOOP

Question 11

The _______ instruction jumps if CX is not 0 and if an equal condition exists.

Answer 11

LOOPE

Question 12

The _______ instruction jumps if CX is not 0 and if an not equal condition exists.

Answer 12

LOOPNE

Question 13

are groups of instructions that perform one task and are used from any point in the program.

Answer 13

Procedureq

Question 14

instruction that links to a procedure

Answer 14

CALL

Question 14

instruction that returns from a procedure

Answer 14

RET

Question 15

directive that defined the name and type of procedure

Answer 15

PROC

Question 16

declares the end of the procedure

Answer 16

ENDP

Question 17

is a combination of a PUSH and a JMP instruction

Answer 17

CALL

Question 18

places the contents of IP on the stack

Answer 18

Near CALL

Question 19

places both IP and CS on the stack

Answer 19

Far CALL

Question 20

removes the return address from the stack and placing it into IP

Answer 20

Near Return

Question 21

removes the return address from the stack and placing it into IP and CS

Answer 21

Far Return

Question 22

are either software instructions similar to CALL or hardware signals used to call procedures

Answer 22

Interrupts

Question 23

returns control to the interrupted software

Answer 23

IRET

Question 24

How many interrupt vectors exist in the first 1KB of memory?

Answer 24

256 interrupt vectors

Question 25

How many interrupt vectors are defined by Intel?

Answer 25

32

Question 26

How many interrupt vectors are user interrupts?

Answer 26

224

Question 27

must be used to return from an interrupt service procedure

Answer 27

IRET

Question 28

a conditional interrupt that calls an interrupt service procedure if the overflow flag is 1

Answer 28

INTO

Question 29

tests the condition of the BUSY or TEST pin on the microprocessor

Answer 29

WAIT

Question 30

passes instruction to the numeric coprocessor

Answer 30

ESC

Question 31

compares the contents of any 16 bit register against the contents of two words of memory

Answer 31

BOUND

Question 32

holds local memory variables for the procedure

Answer 32

stack frame

Question 33

creates the stack frame

Answer 33

ENTER

Question 34

removes the stack frame from the stack

Answer 34

LEAVE

Question 35

The ____ clock generator provides the system clock (CLK), READY synchronization, and RESET synchronization

Answer 35

8284A

Question 36

is used by the microprocessor to send the address to the memory or I/O and the ALE signal to the demultiplexers

Answer 36

T1

Question 37

is used to send data to memory for a write and to test the READY pin and activate control signals RD or WR

Answer 37

T2

Question 38

allows the memory time to access data and allows data to be transferred between the microprocessor and the memory or I/O

Answer 38

T3

Question 39

is where data are written

Answer 39

T4

Question 40

A bus cycle that consists of ___ clocking periods act as the basic system timing.

Answer 40

4

Question 41

Stretch the bus cycle by one or more clocking periods to allow the memory and I/O additional access time.

Answer 41

Wait states (Tw)

Question 42

How many combinations can 10 address pins have?

Answer 42

1024

Question 43

is programmed by an EPROM programmer and can be erased if exposed to ultraviolet light

Answer 43

EPROM

Question 44

is programmed in the system by using a 12 V or 5.0 V programming pulse.

Answer 44

Flash Memory (EEPROM)

Question 45

retains data for as long as the system power supply is attached.

Answer 45

Static RAM (SRAM)

Question 46

retains data for only a short period, usually 2–4 ms.

Answer 46

Dynamic RAM (DRAM)

Question 47

3-to-8 line decoder

Answer 47

74LS138

Question 48

2-to-4 line decoder

Answer 48

74LS139

Question 49

The ______ address decoder for microprocessors like the 8088 through the Pentium 4 reduce the number of integrated circuits required to complete a functioning memory system.

Answer 49

PLD

Question 50

Many EPROMs available today have an access time of _______, which is too slow for the 5 MHz 8088. In order to circumvent this problem, a wait state is inserted to increase memory access time to _______.

Answer 50

450 ns, 660 ns

Question 51

________ features are also available for memory systems, but these require the storage of many more bits.

Answer 51

Error-correction

Question 52

The __________ of memory is enabled by the BHE control signal

Answer 52

High Bank

Question 53

The __________ of memory is enabled by the A0 address signal or by the BLE control signal

Answer 53

Low Bank

Question 54

The 8086–Core2 microprocessors have two basic types of I/O instructions:

Answer 54

IN and OUT

Question 55

inputs data from an external I/O device into either the AL (8-bit) or AX (16-bit) register

Answer 55

IN

Question 56

outputs data from AL or AX to an external I/O device and is available as a fixed, variable, or string instruction.

Answer 56

OUT

Question 57

sometimes called direct I/O

Answer 57

Isolated I/O

Question 58

uses a separate map for the I/O space, freeing the entire memory for use by the program.

Answer 58

Isolated I/O

Question 59

uses a portion of the memory space for I/O transfers

Answer 59

Memory-mapped I/O

Question 60

is either built into a programmable peripheral or located separately.

Answer 60

Buffer

Question 61

All input devices are ______ so that the I/O data are connected only to the data bus during the execution of the IN instruction.

Answer 61

buffered

Question 62

All output devices use a _____ to capture output data during the execution of the OUT instruction

Answer 62

latch

Question 63

is the act of two independent devices synchronizing with a few control lines.

Answer 63

Handshaking or Polling

Question 64

are required for most switch-based input devices and for most output devices that are not TTL-compatible

Answer 64

Interfaces

Question 65

decodes only a l6-bit address for variable port instructions and often an 8-bit port number for fixed I/O instructions

Answer 65

I/O port decoder

Question 66

decodes the entire address

Answer 66

Memory Address Decoder

Question 67

is a programmable peripheral interface (PPI) that has 24 I/O pins that are programmable in two groups of 12 pins each (group A and group B).

Answer 67

82C55

Question 68

Mode 0 of 82C55

Answer 68

Simple I/O

Question 69

Mode 1 of 82C55

Answer 69

Strobed I/O

Question 70

Mode 2 of 82C55

Answer 70

Bidirectional I/O

Question 71

The ________ device requires a fair amount of software, but it displays ASCII-coded information

Answer 71

LCD Display

Question 72

The ______ is a programmable interval timer that contains three l6-bit counters that count in binary or binary-coded decimal (BCD)

Answer 72

8254

Question 73

Modes of 8254

Answer 73

0 - Events Counter 1 - retriggerable, monostable multivibrator 2 - pulse generator 3 - square-wave generator 4 - software-triggered pulse generator 5 - hardware-triggered pulse generator

Question 74

The _______ is a programmable communications interface, capable of receiving and transmitting asynchronous serial data

Answer 74

16550

Question 75

The ________ is an 8-bit digital-to-analog converter that converts a digital signal to an analog voltage within 1.0 μs

Answer 75

DAC0830

Question 76

The _______ is an 8-bit analog-to-digital converter that converts an analog signal into a digital signal within 100 μs.

Answer 76

ADC0804