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stack operationstack is a group of memory locations which are part of the same read write memory used for storing data
rim read interrupt mask instructionthis instruction is used to read the status of interrupts and read the serial
sim set interrupt mask instructionthis instruction is used to mask unmask 8085 interrupts and send serial output data the
di disable interrupts instructionthe interrupt enable flip flop is reset and all the interrupts of 8085 microprocessors except
ei enable interrupts instruction the interrupt enable flip flop is set and all the interrupts of 8085 microprocessor are
cmc complement carry instruction this instruction complements the carry flag i e if the carry flag is 1 before the execution of
stc set carry instruction this instruction sets the carry flag to 1 the instruction format isstc flags except carry no
nop no operation instruction no operation is performed when this instruction is executed the instruction format is
hlt halt instruction the microprocessor halts the execution of the program and enters into the wait state the address and
machine control instructions instructions used to control various machine operations are kept in this
rst restart instructions restart instructions are one byte call instructions called location for each restart instruction is predefined on
for parity flag pre return on parity even and rpo return on parity odd instructionsrpe returns from the subroutine to the calling
for sign flag rp return on plus and rm return on no minus instructions rm returns from the subroutine to the calling program if sign flag
for zero flag rz return on zero and rnz return on no zero instructions rz returns from the subroutine to the calling program if
for carry flag rc return of carry and rnc return on no carry instruction rc returns from the subroutine to the calling program if
condition return similar to conditional jump and call instructions there are conditional return instructions also based on
unconditional returnret instruction this instruction is used to transfer the program sequence from subroutine to the calling program
return instructions these instruction are used to transfer the program sequence from subroutine to the calling program basically it
for parity flag cpre call on parity even and cpo call or parity odd instruction cpe calls the subroutine from the specified
for sign flag cp call on plus cm call on minus instruction cp call the subroutine from the specified memory location
for zero flag cz call on zero cnz call on no zero instructions cz call the subroutine from the specified memory
for carry flag cc call on carry and cnc call on no carry instructions cc calls the subroutine form the specified memory
conditional call instructionsimilar to conditional jump instructions there are conditional call instructions also based on
unconditional call instructioncall unconditional call instructions this instruction calls the subroutine program stored at memory location
call instructionscall instruction are used to call a subroutine program in assembly language procedure and functions are called