Question

INTEL 80x86 ASSEMBLY LANGUAGE CODE

Write a windows32 assembly language program that utilizes a recursive procedure.

The main (_MainProc) procedure should: accept, from the user, a positive integer.

Guard against non-positive integers being entered using a loop.

call the sumseries sub-procedure using the cdecl protocol, receive the results of the sub-procedure, and display the results.

The sumseries sub-procedure should: recursively find the sum of the series: 1*2 + 2*3 + 3*4 + ... + i*(i+1) (This is an iterative definition. Change it to a recursive definition. Refer to your CSC 250 notes if you're not sure how to do this.) return the value back to the main procedure.

Notes: Some representative examples are: sumseries(1) = 2, sumseries(2) = 8, sumseries(3) = 20.

Both main and sumseries must follow the cdecl protocol. If they do not, don't bother turning in the assignment.

It will get a grade of 0! There are ways to do this iteratively, and to even find a closed form expression, but that is not the point of this assignment.

Your program must use a recursive sub-procedure.

Answer 1

To write a Windows 32 assembly language program it utilizes the "Recursive Procedure".

The main procedure should involves:

1.Accept from the user, a positive integer.Guard using a loop to the non-negative integers.

2.Call the sum series subprocedure using the CDECL protocol.

3.Recieve the results of the sub procedure.

4.Finally display the results.

Program:

LDA 2200H

MOV C, A : " Initalize Counter"

MV1 B , 00H : " Sum = 0"

LX1 H,2201H : " Initialize Pointer"

BACK : MOV A ,M : "Get the number"

ANI 01H : " Mask Bit 1 to Bit 7"

JNZ SKIP : " Dont add number is ODD"

MOV A,B : " Get the sum"

ADD M : " SUM=SUM+data"

MOV B,A : "Store result in B register"

SKIP : INX H : "Increment pointer"

DCRC : " Decrement Counter"

JNZ BACK : " Counter 0 repeat"

STA 2210H : "Store Sum"

HLT : " Terminate program execution"