Assembly and Computer org final

smallest signed byte

-128

smallest unsigned byte

0

General-purpose architectures are divided into three groups:

1. memory-memory 2. register-memory 3. load-store

real10

10 byte ieee extended real

largest signed byte

127

largest unsigned byte

255

dword

32 bit unsigned integer

tbyte

80 bit integer

LOAD 800 using direct addressing

900

Multi-line comments begin with ___________

COMMENT directive

T/F An object file is commonly read as input by the assembler.

False

T/F The following is a valid data definition statement:

True

A "subtract" statement is an example of:

an arithmetic instruction

b

binary

Consider the postfix (reverse Polish notation) 10 5 + 6 3 - / The equivalent infix expression is:

(10+5)/(6-3)

What will be the value in ax after running the following code: .datamyBytes BYTE 90h, 77h, 0B9h.codemain PROCmov bx, 0movzx ax, myBytesmov bl, [myBytes+1]add ax, bxmov bl, [myBytes+2]add ax, bxINVOKE ExitProcess,0main ENDP

01C0

An instruction contains:

1. mnemonics 2. operand 3. comment 4. label

Instruction sets are differentiated by which feature?

1. operand storage and location 2. number of operands 3. operations

Flags that are affected by Arithmetic are:

1. overflow 2. zero 3. sign 4. carry

Examples of hazards in pipelines include:

1. resource conflicts 2. data dependencies 3. conditional branch statements

There are three basic ISA architectures for internal storage in the CPU:

1. stack 2. accumulator 3. general-purpose registers

LOAD 800 using indirect addressing

1000

sword

16 bit signed integer

word

16 bit unsigned integer

Given the following code, what is the value in al: .data arrayB BYTE 10h,20h,30h,40h .code mov al, arrayB+1

20h

If the opcodes field for an instruction has n bits, that means there are _______ potential distinct operations.

2^n

sdword

32 bit signed integer

real4

4 byte ieee short real

qword

64 bit integer

LOAD 800 using indexed addressing

700

sbyte

8 bit signed integer

byte

8 bit unsigned integer

real8

8 byte ieee long real

LOAD 800 using immediate addressing

800

Suppose we have the instruction LOAD 800. Given memory as follows: What would be loaded into the AC if the addressing mode for the operating is immediate?

800

Suppose we have the instruction LOAD 800. Given memory as follows: What would be loaded into the AC if the addressing mode for the operating is direct?

900

Consider the infix expression: A-B+C*(D*E-F)/(G+H*K). The equivalent postfix (reverse Polish notation) expression is:

AB-CDE*F-*+GHK*+/

Which of the following cannot be a destination for the mov instruction.

All

In JK Flip Flop, when both inputs are 1, the circuit does the following:

Complements the current state

Which of the following is a representation of computer memory

D flip-flop

______________ , commands that are recognized and acted upon by the assembler

Directives

T/F A string literal must be enclosed in double quotes.

False

T/F Flip-flops are examples of combinational circuits

False

T/F The listing file is generated by the linker.

False

Circuits that change state when the clock voltage reaches its highest or lowest level are called:

Level-triggered

Which instruction that does not affect the flags

MOV

The instruction that fills the upper half of the destination with zeros is:

MOVZX

T/F A JK-FF has no Invalid State

True

T/F D flip-flop is the fundamental circuit of computer memory.

True

T/F If the source code for an assembly language program is modified, you must run both the assembler and linker to update the program's executable code.

True

T/F In the following statement, EAX is called the source operand:

True

T/F Latch is level triggered, whereas a flip-fop is edge triggered.

True

T/F State changes occur in sequential circuits only when the clock ticks.

True

T/F The SDWORD directive is used when defining 32-bit signed integer.

True

T/F sequential circuits rely on feedback to retain their state values.

True

A "store" statement is an example of:

a data movement instruction

Fill in the black for the following code: .data arrayW WORD 1000h,2000h,3000h .code mov ax,[_______________] ; AX = 2000h

arrayW+2

The term endian refers to a computer architecture's ______?

byte order

d

decimal

r

encoded real

h

hexadecimal

Given the following code, which line is invalid because of size mismatch? .data bVal BYTE 100 bVal2 BYTE ? wVal WORD 2 dVal DWORD 5 .code mov ds,45 ;Line #1 mov esi,wVal ;Line #2 mov eip,dVal ;Line #3 mov 25,bVal ; Line #4 mov bVal2,bVal ;Line #5

line #2

A = (A + B) - (C + D).

mov eax, 3d ;register a mov ebx, 10d ;register b mov ecx, 7d ;register c mov edx, 4d ;register d add eax, ebx add ecx, edx sub eax, ecx

Fixed-length instructions:

waste space but are fast and perform better than variable length instructions