Question 1:
a) If the data bus width of a processor is 16 bits what would you state about its complexity and capability?
b) If the address bus of a processor is 16-bits wide, then what is its address space?
c) If the system uses a 5 MHz clock what is its clock period? How does the system clock frequency affect the speed of processing?
Question 2:
a) Why is 8085 called an accumulator based processor.
b) Write brief notes on the register set of 8085.
Question 3: Write an ALP for the given: (By using the instruction set of 8085)
a) Bring data from the location 4567h, add 56h to it and store the sum in location 0567h.use immediate and direct addressing modes for the same.
b) ADD an immediate data 05h to data in memory addresses 0987h.store the sum in next address in memory.
c) Two bytes are stored in the consecutive memory locations beginning from 2000h.add these numbers and if their sum is greater than 255, send a value ‘0’ to the output port with an address 78h and ‘1’ or else.
d) Compare the data stored in location 4566h and 4567h .Send the least of them to an output port numbered 67h.
Question 3:
a) Write a short note on the importance of the segmented memory.
b) Describe the functions of EU and BIU.
c) Why does a Pipeline speedup program execution? Are data bytes placed in pipeline through the BIU?
Question 4: How does a logical address distinct from a physical address and how does an offset address distinct from a logical address?
Question 5: List out the flags and the situation that exists if a flag is ‘0’ or ‘1’. How many address lines to 8086 have and what is the address space does this number permit the 8086 to access directly. At any given time what is the number of segments 8086 is permitted to work with and what is the size of each.