3.4 Assembly Language Flashcards

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1
Q

Assembly language

A
  • Uses mnemonics to represent the operation codes and addresses
  • Typically 2, 3, 4 character mnemonics are used to represent all the machine code instructions
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2
Q

Assembler

A

Translates the assembly language program into the machine code for execution

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3
Q

How can the flow of the program be changed?

A

Different conditionals

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4
Q

Give some examples of conditional

A
  • BRP
  • BRA
  • BRZ
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5
Q

Why can’t the same assembly language be used for different CPU’s?

A

CPU’s have slightly different forms of assembly language

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6
Q

What determines the addressing mode

A

The 2 bits in the opcode

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7
Q

4 different types of addressing modes

A
  • Immediate
  • Direct
  • Indirect
  • Indexed
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8
Q

Immediate addressing

A

Operand is the actual value to be operated on

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9
Q

Direct adressing

A

The operand holds the memory address of the value to be operated on

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10
Q

Indirect addressing

A

Operand is usually the location (typically a register) which holds the address of the data that needs to be used

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11
Q

Indexed addressing

A

The address of the operand is obtained by adding to the contents of a general register a constant value

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