PROBLEMS

Which microprocessor, the $8088$ or the $8086,$ was released first?

If the $80286$ and $80386$ SX both have $16-$bit external data buses, what is the difference between them?

What does $"16-$bit" or $"32-$bit" microprocessor mean? Does it refer to the internal or external data path?

Do programs written for the $\frac{88}{86}$ run on $80286-,80386-,$ and $80486-$based CPUs?

What does the term upward compatibility mean?

Name a major difference between the $8088$ and $8086.$

Which has the larger queue, the $8088$ or $8086?$

State another way to increase the processing power of the CPU other than increasing the frequency.

What do "BIU" and $"$EU$"$ stand for, and what are their functions?

Name the general$-$purpose registers of the $8088/86.$

$($a$)8-$bit

$($b$)16-$bit

Which of the following registers cannot be split into high and low bytes?

$($a$)$ CS

$($b$)$ AX

$($c$)$ DS

$($d$)$ SS

$($e$)$ BX

$($f$)$ DX

$($g$)$ CX

$($h$)$ SI

$($i$)$ DI

Which of the following instructions cannot be coded in $8088/86$ Assembly language? Give the reason why not, if any. To verify your answer, code each in DEBUG. Assume that all numbers are in hex.

$($a$)$ MOV AX$,27$

$($b$)$ MOV AL$,97$F

$($c$)$ MOV DS$,9$BF$2$

$($d$)$ MOV CX$,397$

$($e$)$ MOV SI$,9516$

$($f$)$ MOV CS$,3490$

$($g$)$ MOV DS$,$BX

$($h$)$ MOV BX$,$CS

$($i$)$ MOV CH$,$AX

$($j$)$ MOV AX$,23$ FB $9$

$($k$)$ MOV CS$,$BH

$(1)$ MOV AX$,$DL

Name the segment registers and their functions in the $8088/86.$

If $CS=3499H$ and $IP=2500H,$ find:

$($a$)$ The logical address

$($b$)$ The physical address

$($c$)$ The lower and upper ranges of the code segment

Repeat Problem $14$ with $CS=1296H$ and $IP=100H.$

If DS $=3499H$ and the offset $=3FB9H,$ find:

$($a$)$ The physical address

$($b$)$ The logical address of the data being fetched

$($c$)$ The lower and upper range addresses of the data segment

Repeat Problem $16$ using DS $=1298H$ and the offset $=7CC8H.$

Assume that the physical address for a location is $0046$ CH $.$ Suggest a possible logical address.

If an instruction that needs to be fetched is in physical memory location $389$ F $2$ and $CS=2700,$ does the code segment range include it or not? If not, what value should be assigned to CS if the IP must be $=1282?$

Using DEBUG, assemble and unassemble the following program and provide the logical address, physical address, and the content of each address location. The CS value is decided by DOS, but use IP $=170H.$

MOV AL$,76$ H

MOV BH$,8$ FH

ADD BH$,$AL

ADD BH$,7$BH

MOV BL$,$BH

ADD BL$,$AL