Instruction set of 8085 microprocessor | Instruction set | What is instruction set ? | Types of instructions | Data transfer instructions |Arithmetic instructions |Logical instructions | Branch instructions | Machine control instructions |
-: Instruction Set :-
Instruction set is defined as - Instruction is the commands given by user to the microprocessor and need to be get executed by the processor, then these group of instruction is known as instruction set.
-: Types of Instruction :-
There are some types of instructions of 8085 microprocessor these are-
1-Data transfer instructions
2-Arithmetic instructions
3-Logical instructions
4-Branch instructions
5-Machine control instructions
Ex-MOV source,destination
MVI(move immediate data)-This instruction is used to move immediate data into the specified register.
Ex-MVI R,8-bit data
LXI(load register pair immediate)-This instruction load 16 bit data in the register pair BC,DE and HL with the data byte available immediate.
Ex-LXI Rp, 16 bit address.
LHLD(Load H and L register direct)-This instruction copies the content of memory location pointed by 16 bit address in register L and copies the content of next memory location in register H.
Ex-LHLD 16 bit address
LDA(load accumulator direct)-This instruction copy the data of the given memory location in accumulator.
Ex-LDA 16 bit address
LDAX (load accumulator indirect)-This instruction copies the content of memory location whose address is specified by register pair into the accumulator.
Ex-LDAX, Rp
SHLD (store H and L register direct)-This instruction store the content of register in the memory location given within the instruction and content of H register at address next to it
Ex- SHLD, 16-bit address
STA(store accumulator direct)-The content of accumulator is copied into memory location is specified by operand(16 bit address).
Ex-STA, 16 bit address
STAX(store accumulator indirect)-the content of accumulator are copied into memory location is specified by register pair.
Ex-STAX 16 bit address
2. Arithmetic instructions:-These instruction are used for arithmetic operations like addition subtraction increment/decrement.
SUI(subtract immediate data from accumulator)-The 8 bit data are subtracted from the content of accumulator and result is stored in accumulator.
XRI(XOR immediate with accumulator)-the output data are XOR with the content of accumulator and result Store in same place.
Ex-XRI 8 bit data
-: Instruction Set :-
Instruction set is defined as - Instruction is the commands given by user to the microprocessor and need to be get executed by the processor, then these group of instruction is known as instruction set.
-: Types of Instruction :-
There are some types of instructions of 8085 microprocessor these are-
1-Data transfer instructions
2-Arithmetic instructions
3-Logical instructions
4-Branch instructions
5-Machine control instructions
Ex-MOV source,destination
MVI(move immediate data)-This instruction is used to move immediate data into the specified register.
Ex-MVI R,8-bit data
LXI(load register pair immediate)-This instruction load 16 bit data in the register pair BC,DE and HL with the data byte available immediate.
Ex-LXI Rp, 16 bit address.
LHLD(Load H and L register direct)-This instruction copies the content of memory location pointed by 16 bit address in register L and copies the content of next memory location in register H.
Ex-LHLD 16 bit address
LDA(load accumulator direct)-This instruction copy the data of the given memory location in accumulator.
Ex-LDA 16 bit address
LDAX (load accumulator indirect)-This instruction copies the content of memory location whose address is specified by register pair into the accumulator.
Ex-LDAX, Rp
SHLD (store H and L register direct)-This instruction store the content of register in the memory location given within the instruction and content of H register at address next to it
Ex- SHLD, 16-bit address
STA(store accumulator direct)-The content of accumulator is copied into memory location is specified by operand(16 bit address).
Ex-STA, 16 bit address
STAX(store accumulator indirect)-the content of accumulator are copied into memory location is specified by register pair.
Ex-STAX 16 bit address
2. Arithmetic instructions:-These instruction are used for arithmetic operations like addition subtraction increment/decrement.
For Addition instruction
ADD(ad register / memory data to accumulator)-this instruction add the content of register or memory with the content of accumulator and result is store in accumulator.
ADD(ad register / memory data to accumulator)-this instruction add the content of register or memory with the content of accumulator and result is store in accumulator.
Ex-R/M
ADI(Add immediate data to accumulator)-date with data are added to content of accumulator and result store in accumulator.
ADI(Add immediate data to accumulator)-date with data are added to content of accumulator and result store in accumulator.
Ex-ADI 8 bit data
ACI(Add immediate data to accumulator with carry)-this instruction at the 8 bit data and carry flag with akinator content and result store in accumulator.
Ex-ACI 8 bit data
ADC(Add register data to accumulator with carry)-the content of register or memory are carry flag are added to contents of accumulator and result is placed in accumulator.
Ex-ADC R/M
DAD(add register pair to H and L register)-this instruction is used to add the 16 bit contents of specified register with content of register pair HL and sum is saved in HL register.
Ex-Rp
SUB(subtract register or memory from accumulator)-this instruction is used to to subtract the content of register or memory from accumulator and result student accumulator.
Ex-SUB R/M
Ex-SUB R/M
SUI(subtract immediate data from accumulator)-The 8 bit data are subtracted from the content of accumulator and result is stored in accumulator.
Ex- 8 bit data
SBB(subtract source and borrow from accumulator)-the content of register or memory and the borrow flag are subtracted from the contents of accumulator and result are placed in accumulator.
Ex- R/M
SBI(subtract immediate with borrow)-the 8 bit data and borrow are subtracted from the content of accumulator.
Ex-SBI, 8 bit data
INR(instrument content of registers / memory by 1)-this instruction used to tu increment the content of register / memory by 1 and result store in same place.
Ex-INR R/M
INX(increment register pair by 1)-this instruction used to increments the content of specified register pair by 1.
Ex-INX,Rp
DCR (requirement source by 1)-the content of designated register / memory is decrement by 1 and Store the result in same place.
Ex-DCR, R/M
DCR (requirement source by 1)-the content of designated register / memory is decrement by 1 and Store the result in same place.
Ex-DCR, R/M
DCX(decrement register pair by 1)-this instruction used to determine the content of register pair by 1.
Ex-DCX,Rp
3. Logical instructions-These are the instruction used to perform the logical operation like AND,OR and XOR.
ANA(logically AND with accumulator)-the content of accumulator are logically AND with the content of register or memory location and result stored in accumulator.
ANA(logically AND with accumulator)-the content of accumulator are logically AND with the content of register or memory location and result stored in accumulator.
Ex-ANA,R/M
ANI(AND immediate with accumulator)-this instruction used to ANDed the contents of accumulator with specified 8 bit data and result is placed in accumulator.
Ex-ANA, 8 bit data
XRA(XOR with accumulator)-the content of a specified register or memory definition are XOR with the contents of of accumulator and result is placed in accumulator.
Ex-XRA,R/M
XRI(XOR immediate with accumulator)-the output data are XOR with the content of accumulator and result Store in same place.
Ex-XRI 8 bit data
ORA(logically OR with accumulator)-this instruction used to logically ORthe contents of accumulator with content of register or memory location.
Ex-ORA,R/M
ORI(logically OR immediate)-the contents of accumulator are logical OR with the 8-bit data in operand and result is Store in accumulator.
Ex-ORI, 8-bit data
CPI(logically compare immediate)-this instruction used to compare data with the content of accumulator of less than equal to or greater.
CMP (logically compare)-this instruction used to compare the content of memory with the content of accumulator of less than equal to or greater than.
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