microprocessor - 1B

[logistic_guy]

\(\displaystyle \bold{1.}\) What are program-visible registers?
\(\displaystyle \bold{2.}\) The \(\displaystyle 80286\) addresses registers that are \(\displaystyle 8\) and _________ bits wide.
\(\displaystyle \bold{3.}\) The extended registers are addressable by which microprocessors?
\(\displaystyle \bold{4.}\) The extended \(\displaystyle \text{BX}\) register is addressed as _________.
\(\displaystyle \bold{5.}\) Which register holds a count for some instructions?
\(\displaystyle \bold{6.}\) What is the purpose of the \(\displaystyle \text{IP/EIP}\) register?
\(\displaystyle \bold{7.}\) The carry flag bit is not modified by which arithmetic operations?
\(\displaystyle \bold{8.}\) Will an overflow occur if a signed \(\displaystyle \text{FFH}\) is added to a signed \(\displaystyle 01\text{H}\)?
\(\displaystyle \bold{9.}\) A number that contains \(\displaystyle 3\) one bits is said to have _________ parity.
\(\displaystyle \bold{10.}\) Which flag bit controls the \(\displaystyle \text{INTR}\) pin on the microprocessor?

 

[logistic_guy]

\(\displaystyle \bold{1.}\) What are program-visible registers?

\(\displaystyle \textcolor{blue}{\text{Program-visible registers are those that are directly accessed or used within an instruction.}}\)

 

[logistic_guy]

\(\displaystyle \bold{2.}\) The \(\displaystyle 80286\) addresses registers that are \(\displaystyle 8\) and \(\displaystyle \textcolor{blue}{16}\) bits wide.

 

[logistic_guy]

\(\displaystyle \bold{3.}\) The extended registers are addressable by which microprocessors?

\(\displaystyle \textcolor{blue}{\text{The 80386 through the Core2}}\)

 

[logistic_guy]

\(\displaystyle \bold{4.}\) The extended \(\displaystyle \text{BX}\) register is addressed as \(\displaystyle \textcolor{blue}{\text{EBX}}\).

 

[logistic_guy]

\(\displaystyle \bold{5.}\) Which register holds a count for some instructions?

\(\displaystyle \textcolor{blue}{\text{CL, CX, ECX, or RCX}}\)

 

[logistic_guy]

\(\displaystyle \bold{6.}\) What is the purpose of the \(\displaystyle \text{IP/EIP}\) register?

\(\displaystyle \textcolor{blue}{\text{Holds the offset address of the next step in the program.}}\)

 

[logistic_guy]

\(\displaystyle \bold{7.}\) The carry flag bit is not modified by which arithmetic operations?

\(\displaystyle \textcolor{blue}{\text{INC and DEC}}\)

 

[logistic_guy]

\(\displaystyle \bold{8.}\) Will an overflow occur if a signed \(\displaystyle \text{FFH}\) is added to a signed \(\displaystyle 01\text{H}\)?

\(\displaystyle \textcolor{blue}{\text{No, if you add} +1 \ \text{and} \ –1 \ \text{you have zero which is a valid number.}}\)

 

[logistic_guy]

\(\displaystyle \bold{9.}\) A number that contains \(\displaystyle 3\) one bits is said to have \(\displaystyle \textcolor{blue}{\text{odd}}\) parity.

 

[logistic_guy]

\(\displaystyle \bold{10.}\) Which flag bit controls the \(\displaystyle \text{INTR}\) pin on the microprocessor?

\(\displaystyle \textcolor{blue}{\text{The I-flag.}}\)