Chapter 6 - Notes Flashcards
Which one is easier to work with? Naked Machine or Virtual Machine?
Virtual Machine
Which one can you be more productive with? Naked Machine or Virtual Machine?
Virtual Machine
A low level programming language is also called a?
Assembly Language
What is a Pseudo-Op?
Commands in the program directed to the assembler, not converted to machine instructions.
What are .BEGIN, .DATA and .END examples of?
Pseudo-Ops
What are some advantages of Assembly Language?
- Easier to debug
- Readability
- Maintainability
- Symbolic labels
- Program clarity
How would you express X = Y + 3 in Assembly Language?
LOAD Y
ADD THREE
STORE X
END
X: .DATA 0 –X is initially 0
Y: .DATA 5– Y is initially 5
THREE: .DATA 3 – The constant 3
True or false? Pseudo-ops are instructions provided by assembler.
True
True or false? A pass is when the assembler chooses not to do anything with a particular program.
False
What does it mean to bind (tie together) a symbolic name with a memory address?
Associating the name with the address
What’t the purpose of the loader?
Loads the object file to the memory and then executes it
A program written in assembly language is called a:
source program.
How does an assembler use the symbol table?
In the first pass: collects symbolic labels and their position relative to start of the program
In the second pass: substitutes the position for the symbol
Which of these is the label in this sample code:
NEXTSTEP: LOAD X – Put X into reg.R
NEXTSTEP:
Which of these is the mnemonic in this sample code:
NEXTSTEP: LOAD X – Put X into reg.R
LOAD
