MFP lab9

1. divide by 0 int


;file1.asm--------------------------------
public  str1

    extrn DIVERROR : Far

    Data Segment
        str1 db 'We can not do this $'

    Data Ends

    Code Segment

        assume cs:code ,ds:data
        mov ax,data
        mov ds,ax
        xor ax,ax

        mov ax,0
        mov es,ax

        mov word ptr es:0000 ,offset DIVERROR
        mov word ptr es:0002 ,SEG DIVERROR

        mov ax,10
        mov bl,0
        DIV bl
        int 3h
    Code Ends
    End




;file2------------------------------------------

extrn str1: Byte
public DIVERROR

c4 segment
    assume cs:c4
    DIVERROR proc far

    lea dx, str1
    mov ah,09h
    int 21h
    mov bl,10
    Iret

    DIVERROR Endp
c4 Ends
End


2. overflow int
3. implement a macro which will evaluate nCr and include the macro using include.h file