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GATE 2019: Digital Electronics Quiz 4
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Question 1
Maximum number of 
memory chips that can be interfaced with INTEL 8085 Microprocessor are _________.
memory chips that can be interfaced with INTEL 8085 Microprocessor are _________. Question 2
The logic circuit given below is used to generate chip select signal by INTEL 8085 Microprocessor to address a peripheral. The peripheral will respond to address in the range.
Question 3
In order to retrieve the relearn address from the stack memory, what instruction is used by every interrupt?
Question 4
In INTEL 8085 Microprocessor after execution of XRA A instruction bits present in flags
are _________.
For Example:
If
Then answer is abcde
are _________. For Example:
If
Then answer is abcde
Question 5
Consider the following 8085 Microprocessor assembly language program.
1- LXI SP, 0200 H
2- LXI B, 1028 H
3- LXI H, 42FF H
4- PUSH H
5- LXI D, 20FE H
6- DAD B
7- X CHG
8- DAD D
9- HLT
After execution of above program content of HL register pair is ________ H.
1- LXI SP, 0200 H
2- LXI B, 1028 H
3- LXI H, 42FF H
4- PUSH H
5- LXI D, 20FE H
6- DAD B
7- X CHG
8- DAD D
9- HLT
After execution of above program content of HL register pair is ________ H.
Question 6
The following set of instructions are executed in INTEL 8085 Microprocessor.
LXI B, 0020 H
LOOP DCX B
MOV A, B
ORA C
JNZ LOOP
HLT
The number of times the instruction ORA C executed is __________.
LXI B, 0020 H
LOOP DCX B
MOV A, B
ORA C
JNZ LOOP
HLT
The number of times the instruction ORA C executed is __________.
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