#CX PROGRAMMER MEMORY MOV INSTRUCTION CODE#

REP: repeat until value of CX is not equal to zero and decrement the value of CX by one at each step.INC SI: increment the value of SI by one.

MOV CH, 00: load value 00 into CH register.

MOV CL, : load the data of offset SI into CL register.

MOV ES, AX: load the value of AX register into ES (extra segment).

MOV DS, AX: load the value of AX register into DS (data segment).

MOV AX, 0000: load the value 0000 into AX register.

MOV DI, 600: load the value 600 into offset DI.

MOV SI, 500: load the value 500 into offet SI.

Transfer the data from source to destination memory location

transfer the data from source memory location to destination memory location and decrease the value of CX by one.

check the value of CX, if not equal to zero then repeat step 10 otherwise go to step 11.

clear the directional flag so that data is read from lower memory to higher memory location.

load the data of offset SI into CL register and load value 00 into CH register.

load the data of AX register into ES(extra segment).

load the data of AX register into DS(data segment).

set the value of offset DI equal to 600.

set the value of offset SI equal to 500.

Here, value of SI and DI is updated automatically. MOV SI, CX 89 0C INC AX 40 MOV SI, DX 8914 INC BX 43 MOV SI, 2000H BE 00 20 INC CX 41.

#CX PROGRAMMER MEMORY MOV INSTRUCTION CODE#

MOVSB instruction is used to transfer bytes only from source memory location (MADS) to destination memory location (MAES). 8086 Instructions hex code In this Page find the 8086 Microprocessor Instruction Hex Code we provide for you. REP instruction is used to repeat the step until value of CX is not equal to zero and value of CX is decremented by one at every step, i.e., CX=CX-1 Now, value of SI and DI will be increased. The value of DS and ES is taken equal to 0000.Д¬LD instruction is used to clear the directional flag, i.e., DF=0.The data is transferred to a continous memory location starting from 600.The 8-bit data which have to be transfer is stored in continuous memory location starting from 501.The value of counter which tells the number of bytes to be transferred is stored at offset 500.The block of data which is stored from memory location starting from 501 to 504 offset is transferred to another memory location which is starting from 600 to 603 offset.In this example, the counter value stored in CX register is 4.Problem вЂ“ Write an assembly language program to transfer a block of bytes from one memory location to another memory location by using string instruction.

Cx programmer memory mov instruction