Denote by \"source-x\" a list of data located at address 0041 8000h, and by \"de

Question

Denote by "source-x" a list of data located at address 0041 8000h, and by "dest-y" the destination in memory located at 00AF A000h. Our application calls for a transfer of source-x to dest-y using the corresponding move string instruction. Recall that these instructions use registers esi and edi to point to the source and destination locations, respectively. Write the necessary assembly instructions to initialize registers esi and edi to point to the required data before the transfer takes place.

Explanation / Answer

ESI and EDI are the general purpose registers in assembly language.These registers are used for string operation.

Opcodes like MOVSB and MOVSW that efficiently copy the data from memory pointed to by ESI to memory pointed to by EDI.

Following code shows the assembly instructions to initialize registeers esi and edi.

mov esi , 0041 8000h

mov edi , 00AF A000h

mov ecx , byte_count

cld

rep movsb; fast!

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