Consider a $6-$bit twos complement representation of integers. Show an example of each

of the following:

i$.$ Adding two numbers together with a carry out of $1$ with overflow.

ii$.$ Adding two numbers together with a carry out of $1$ but no overflow.

iii. Adding two numbers together with a carry out of $0$ with overflow.

iv$.$ Adding two numbers together with a carry out of $0$ but no overflow.

$2.$ Find the single precision floating point representation of $86\mathrm{.}1.$ Give answer in

hexadecimal form.

$3.$ Find the double precision floating point precision of $1012\mathrm{.}125.$ Give answer in

hexadecimal form.

DEBUG EXERCISES

$4.$ Get into DEBUG.

a$.$ Enter the command: e $20$A $40$

Explain what this command does.

b$.$ Enter the command: d $20$A

What does this command do$?$ How does what you see on the screen relate back to the

command in a$.?$

c$.$ Enter the command: u $20$A$,20$A

Explain what this command does.

Exit from DEBUG.

$6.$ Write an assembly language program suitable for DEBUG that adds the following four

hexadecimal numbers together and puts the result in AX:

$154$BB $0$B $2$

Exit from DEBUG.

$7.$ Get into DEBUG and enter the following assembly language instructions using the A

command:

mov ax$,-10$

mov bh$,-21$

mov bl $17$

nop

Run the program using the T command.

a$.$ Notice the value placed in ax$.$ CLEARLY EXPLAIN how was that hexadecimal value arrived

at$?$ Show your work.

b$.$ How is the final value arrived at in BX$?$ Again, show.

Exit DEBUG

$8.$ Get into DEBUG.

a$.$ Execute the following command: e $1005$d $3$c $0$f $50$

What did this command do$?$

b$.$ Use the A command to enter the following program:

mov ch$,[101]$

mov cl$,5$

mov bx$,0$

mov bl$,[100]$

inc bx

mov ax$,[102]$

inc ax

nop

Execute the program using the T command.

c$.$ Show the final values of ax$,$ bx and cx$.$ Explain in detail how each arrived at their particular values