Pin Diagram
Interrupts
Instructions
Flags
Registers
100
8085 microprocessor has how many pins
40
100
Which one of the following is not a vectored interrupt ?
INTR
100
HLT opcode means ?
end of program
100
Processor status word of 8085 microprocessor has five flags ?
S, Z, AC, P, CY
100
The stack pointer register in a microprocessor ?
holds the address of the top of the stack
200
The program counter in a 8085 micro-processor is a 16-bit register, because ?
There are 16 address lines
200
The address bus of any microprocessor is always ?
Unidirectional
200
The cycle required to fetch and execute an instruction in a 8085 microprocessor is which one of the following ?
Instruction Cycle
200
The highest priority in 8085 microprocessor system is ?
TRAP
200
Address line for TRAP is ?
0024H
300
A microprocessor is ALU ?
register unit and control unit on a single chip
300
The word size of 8085 microprocessor is ?
8 bits
300
In an intel 8085A, which is the first machine cycle of an instruction ?
Opcode fetch cycle
300
What addressing mode is used in the instruction RET ?
Register-indirect
300
A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the ?
accumulator
400
An 8-bit microprocessor signifies that ?
8-bit data bus
400
Which instruction in an 8085 processor can clear the accumulator 8085 ?
XRA A
400
Total no. of instruction for 8085 microprocessor assembly language is ?
246
400
Maximum number of I/O that can be addressed by the INTEL 8085 is ?
256
400
A microprocessor is generally ?
single chip LSI
500
In microprocessor based system DMA refers to ?
Direct memory access for the i/o devices
500
level triggering interrupts are
RST 6.5 and RST 5.5
500
In the register indirect addressing mode of 8085 microprocessor, data is stored Register ?
at the address contained in the register pair
500
ALE stands for ?
Address Enable Latch
500
In 8085 processor, which type of instruction does not affect the flag ?
Data transfer instruction