Intoduction to Computer Organization 1 Write an assembly lan

Intoduction to Computer Organization

1. Write an assembly language program to fill a block of ten bytes starting at memory 31H with characters 2A.

Step 1:Move bytes from location 31h downwards

Source program:

LXI H,31H :Initialize pointer at the last location of array

LXI D,33H :Initialize another pointer to point the last location of array after insertion

Again :MOV A,M :get character

STAX D D :store at the new location

DCX :decrement destination pointer

DCX H :decrement source pointer

MOV A,L :move a to l

CPI 05 H:check whether desired bytes are shifted or not

JNZ AGAIN :if not repeat the process

INX H :adjust the memory pointer

LXI D,31H :intialize the memory pointer to point the string to be inserted

REPE :LDAX D:get the character

MOV M,A :store it in array

INX D :increment destination pointer

INX H :increment source pointer

MOV A,E :check

CPI 04 :check whether the bytes are inserted

JNZ REPE:if not repeat the process

HLT :stop