MPMC CA2 quiz

Which is not the input signal to the bus controller 8288?

• CLK

• CEN

• IOB

• DEN

In 8086 microprocessor one of the following statements is not true .

• Coprocessor is interfaced in MAX mode

• Coprocessor is interfaced in MIN mode

• I/O can be interfaced in MAX/MIN mode

• Supports pipelining

List the three primary steps of the instruction execution cycle in sequential order

• Fetch, decode, memory write

• Fetch, memory read, execute

• Decode, fetch, execute

• Fetch, decode, execute

How many latch IC's are required to demultiplex the multiplexed lines in 8086?

• 1

• 2

• 3

• 4

Which of the following is an illegal 8086 instruction?

• IRET

• PUSH AX

• ADD BX, 2500H

• MOV AX,AY

CMP instruction modifies the

• Program Counter

• Instruction Register

• Flag Register

• Accumulator

The result of MOV AL,65 is to store

• 0100 0010 in AL

• ASCII code of 'A' in AL

• Store 42H in AL

• Store 1000 0001 in AL

A Conditional jump instruction

• Always causes a transfer of control

• Always involves the use of the status register

• Always modifies the program counter

• Always involves testing of Zero flag

The conditional branch instruction JNS performs the operation when

• ZF=0

• SF=0

• PF=0

• SF=1

What is the output of the following code? SI= 1000 0011 1010 1101, CF=0

SHR SI,1

• SI=56CF H, CF=1

• SI=41D6H, CF=1

• SI=7376 H, CF=1

• SI=71C5 H, CF=1