how can I turn on super vga?

[David Jaffe]

I want to turn on super vga (mode 54h) on my 386 (runnin xenix 2.3.2).
How can I do it?  The following routine gives a segmentation fault,
which is not too surprising, since I have no idea what I am doing.

_turn_on_super_vga	proc near
        push ebp
        mov ebp,esp
        push es
        mov al,54h
        mov ah,12h
        mov bx,5506h
        int 10h
        mov ax,bp
        pop es
        leave
        ret
_turn_on_super_vga 	endp

David Jaffe (jaffe at hoss.unl.edu)
University of Nebraska  --  Lincoln