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Machine instructions and addressing modes


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1: A low memory can be connected to microprocessor by using

A.
INTER
B.
RESET IN
C.
Both (a) and (b)
D.
READY
  Answer Report Discuss

2: To put the microprocessor in the wait state
A.
lower the HOLD input
B.
lower the READY input
C.
raise the HOLD input
D.
None of these
  Answer Report Discuss

3: A basic instruction that can be interpreted by a computer generally has

A.
An operand and an address
B.
A decoder and an accumulator
C.
Sequence register and decoder
D.
None of these
  Answer Report Discuss

4: In a microprocessor system with memory mapped I/O
A.
Devices have 8-bit addresses
B.
Devices are accessed using IN and OUT instructions
C.
There can be a maximum of 256 input devices and 256 output devices
D.
Arithmetic and logic operations can be directly performed with the I/O data.
  Answer Report Discuss

5: The addressing mode used in an instruction of the form ADD X, Y, is

A.
absolute
B.
immediate
C.
indirect
D.
Relative
  Answer Report Discuss

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