.386p
locals

public  MB_ALLOC

_TEXT           segment byte public use32 'CODE'
assume  cs:_TEXT

MB_ALLOC:
        push ebx esi edi

        mov cx,[esp+4+12]
        mov bx,[esp+4+12+2]
        mov ax,501h
        int 31h
        jc short @@00

        mov edx,[esp+4+12+4]
        mov [edx],cx
        mov [edx+2],bx
        mov [edx+8],di
        mov [edx+10],si
        mov eax,[esp+4+12]
        mov [edx+4],eax

        xor eax,eax
        jmp short @@01

@@00:
        movsx eax,ax
        cmp ah,80h
        je short @@01
        mov eax,-32768

@@01:
        pop edi esi ebx
        ret 8

_TEXT           ends
end