Modify the sample program to subtract 1000 from the number stored at number. Hint: Copy number to EAX, and then use sub eax,1000 to subtract 1000. Store the difference in memory at diff. Assemble, link, and execute the program. Explain the changes that are displayed in registers and memory after execution of each instruction.

fig3-1.asm - Notepad File Edit Format View Help Example assembly language program Author: R. Detmer 6/2013 adds 158 to number in memory ; Date: .586 .MODEL FLAT STACK 4096 ; reserve 4096-byte stack ; reserve storage for data .DATA number DWORD sum DWORD -105 ? .CODE main ; start of main program code PROC mov add eax, number eax, 158 sum, eax ; first number to EAX ; add 158 ; sum to memory mov eax, o ; exit with return code MOV ret ENDP main END ; end of source code