INSTRUCTION SET

INSTRUCTION SET

INSTRUCTION SET 1 

MOV A,B :- It is a very common instruction to transfer data from accumulator(A) to register B .

MVIM A2H :- It immediately move the data A2H in respected memory location .

LDAX B :- It is used to load data to A from memory location whose address is stored in register B and C .

STAX B :- This instruction store data a to memory location whose address is contain in register B and C .

LXIH 4000 :- This instruction load register H with 40 and register L with 00 .

XCHG :- It exchanges the data stored in pairs i,e, HL<=>DE .

XTHL :- This instruction is used to exchange data in register H with location (SP-1) and data in register L with location (SP) .

INR , DCR :- Increment or decrement of data stored in a register or accumulator by 1 .

INX , DCX :- This instruction increase or decrease the data stored in register respected pair by 1 .

RAL :- This instruction is used to rotate the content of carry and accumulator towards left . Carry occupies the LSB position of acc and MSB of acc goes towards left and occupies carry .

RAR :- To shift the content of carry and acc by one bit position towards right so that the LSB enters into CY   and the content of CY enters into MSB of acc .

RLC :- It is used to store MSB of acc at CY and at LSB of acc while other bitsof acc shifted towards left .

RRC :- Due to this instruction LSB of acc stores at both CY and MSB of acc .

STC :- This instruction set the content of carry to 1 .

CMC :- This instruction complement the content of the carry .

CMA :- This instruction is used to complement the content of acc .

CMPM :- This instruction compare the content of memory with the content of acc .

DAA :- DAA means decimal adjust in addition . This instruction convert the content of acc inti decimal number after the binary addition of two numbers .

ADD B :- It is used for addition of the content of register B with the content of acc and the result is stored in acc .

ADC B :- It add the content of acc with carry and register B and after addition the result is stored in acc . 

ADI :- For direct addition of data with the content of acc  this instruction is used .

DAD B :- For 16 bit addition this instruction is used . The said instruction will add the content of BC pair with the content of HL pair and the result is stored in HL register pair .

SUB C :- It subtracts the content of register C from acc and the result is stored in acc .

SUI 30H :- This instruction is used for direct subtraction of 30H from the content of acc and the result is stored in acc .

SBI 30H :- This instruction subtracts the data 30H along with the content of CY from the acc .