ISA Ext

Question 1

Fetch

Answer 1

Instructions are fetched from the memory address,
the memory address is stored in the program counter
and then stored into the instruction register,
the program counter at the end of the instruction the moves to the next instruction.

Question 2

Decode

Answer 2

the decoder decodes the instruction in the instruction register and interprets it for the machine.

Question 3

Execute

Answer 3

The control unit then passes the decoded information
as a sequence of signals
to relevant parts of the CPU
and performs actions.

Question 4

What is Assembly?

Answer 4

Low - level language designed for systems so we dont have to use machine language.

Question 5

What is an assembler?

Answer 5

Translates assembly code into machine code

Question 6

Instruction Cycles

Answer 6

To get instructions to the control unit

Question 7

Memory Hierarchy levels

Answer 7

*Fastest*
Registers
Cache
Main Memory
Magnetic disk
Optical disk
*Slowest*

Question 8

6 architecture levels

Answer 8

0 digital logic level
compiler
1 microarchitecture
assembler
2 instruction set level
OS
3 operating system machine level
microprogram
4 assembly level
hardware
5 problem oriented Level

Question 9

How do the 6 levels or architecture work together

Answer 9

• Program runs in level 05,
• is compiled and ran through an assembler (level 04),
• Partial interpretation with the OS (Level 03),
• which uses instructions (level 02)
• to transform into binary code which interprets into micro architecture (level 01)
• and then uses logic to work with hardware into logic gates (level 0) and signalling.

Question 10

ISA proper def

Answer 10

Instruction set architecture is how the machine operates, this includes how memory, data types registers and I/O devices operate