MOS stands for ____________________

• Material Operating Semiconductor

• Metal Oxide Semiconductor

• Metal Operating Segment

• None of the mentioned

In register address mode, the operand is stored in

• 8-bit general purpose register

• 16-bit general purpose register

• si or di

• all of the mentioned

The bus is available when the DMA controller receives the signal

• HRQ

• HLDA

• DACK

• All of the mentioned

The number of clock cycles required for an 8257 to complete a transfer is

• 2

• 4

• 8

• NONE

The register of 8257 that can only be written in is

• DMA address register

• Terminal count register

• Mode set register

• Status register

All the functions of the ports of 8255 are achieved by programming the bits of an internal register called

• data bus control

• read logic control

• control word register

• none of the mentioned

Which of the following is not a Features of 8086?

• It uses two stages of pipelining

• It is available in 3 versions based on the frequency of operation

• Fetch stage can prefetch up to 6 bytes of instructions

• It has 512 vectored interrupts.

8086 can access up to?

• 512KB

• 1Mb

• 2Mb

• 256KB

. 8085 microprocessor is an 8-bit microprocessor designed by?

• IBM

• DELL

• INTEL

• MOTOROLA

In 8085, 16-bit address bus, which can address upto?

• 16

• 32

• 64

• 128