code segment main proc far assume code segment start main proc fa push ds assume mov ax 0 start push ax ret mov ax. 4c00h main endp int 21h code ends main endp end start code ends end start6 …… code segment main proc far assume …… start: push ds mov ax, 0 push ax …… ret main endp code ends end start …… code segment main proc far assume …… start: …… …… mov ax,4c00h int 21h main endp code ends end start