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Categories >> Software >> Embedded Systems >> 86 Family
 
 


 

 
 86 Family interview questions  86 Family Interview Questions (53)
 VLSI interview questions  VLSI Interview Questions (200)
 DSP interview questions  DSP Interview Questions (9)
 Embedded Systems AllOther interview questions  Embedded Systems AllOther Interview Questions (24)
Question
What is PSW?
 Question Submitted By :: 86-Family
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
program status word.... a reg in the
microcontroller/microprocessor s showing the current current
status of alu operation

eg: if a carry is generated after an alu operation ,the
corresponding carry flag bit in this reg will set 1.

like if the result is a zero, then the zero flag is set...
 
Is This Answer Correct ?    67 Yes 22 No
Geo
 
Answer
# 2
5 bits indicate the 5 status flags and 3 bits are
undefined. The combination of these 8 bits is called
Program status Word(PSW). PSW and the accumulator are
treated as a 16 bit stack pointer
 
Is This Answer Correct ?    65 Yes 21 No
Pratik
 
 
 
Answer
# 3
PSW is program status word. it contains various flags like
sign, zero, carry, auxillary carry, and parity . these
flags are affected by result of ALU.
 
Is This Answer Correct ?    18 Yes 5 No
Saravanan
 
Answer
# 4
PSW stands for Program Status Word, it is 16-bits hardware
register that maintains the status of program being
executed. It shows the current status of ALU operation.
[psw]<- [A]+[flag]
 
Is This Answer Correct ?    16 Yes 5 No
Mahim Nimbawat
 
Answer
# 5
The Program Status Word (PSW) contains status bits that
reflect the current CPU state
 
Is This Answer Correct ?    7 Yes 3 No
Santhoshi
 
Answer
# 6
program status word.... a reg in the
microcontroller/microprocessor s showing the current current
status of alu operation

eg: if a carry is generated after an alu operation ,the
corresponding carry flag bit in this reg will set 1.

like if the result is a zero, then the zero flag is set...
 
Is This Answer Correct ?    12 Yes 11 No
Md Riyaz Alam
 
Answer
# 7
PSW stands for Program Status Word, it is 16-bits hardware
register that maintains the status of program being
executed. It shows the current status of ALU operation.
 
Is This Answer Correct ?    7 Yes 6 No
Noor
 
Answer
# 8
In computer ,the program status word is an area of memory or a hardware register which contains information about program stateused by the operating system and the underlying hardware.It will normally include a pointer(address)to the next instruction to be executed. 
Is This Answer Correct ?    3 Yes 6 No
Dhananjay Mishra
 
Answer
# 9
program status word.... a reg in the
microcontroller/microprocessor s showing the current current
status of alu operation

eg: if a carry is generated after an alu operation ,the
corresponding carry flag bit in this reg will set 1.

like if the result is a zero, then the zero flag is set...
 
Is This Answer Correct ?    3 Yes 8 No
Vikrant Devendra Musale
 
Answer
# 10
PSW is a 8-bit register. 5 bit indicates status of 5 flags.
3 bits are user definable.
 
Is This Answer Correct ?    21 Yes 27 No
Nandhini. R
 

 
 
 
Other 86 Family Interview Questions
 
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Where can i find the sample ASSEMBLY LANGUAGE programs????? plz tell me the site or forum......anything which can have the sample codes/programs of assembly language???? TCS 5
What are set up time & hold time constraints What do they signify Which one is critical for estimating maximum clock frequency of a circuit? AMD 1
8085 is how many bit microprocessor?   18
What happens during DMA transfer?   9
What is the difference detween ISR & function call Bosch 16
Give the truth table for a Half Adder, Give a gate level implementation of the same? Wipro 4
What is flag, bus?   8
Give a circuit to divide frequency of clock cycle by two ?   6
Explain the working of a binary counter?   2
Suppose you have a combinational circuit between two registers driven by a clock. What will you do if the delay of the combinational circuit is greater than your clock signal? Wipro 3
In a processor these are 120 instructions . Bits needed to impliment this instructions [a] 6 [b] 7 [c] 10 [d] none Wipro 2
Which line will be activated when an output device require attention from CPU?   3
 
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