video mode question

[Brian Stupar]

does anyone know how to set the video mode to 80 x 43?  i have
tried using int 10 func 00, but any values over 11 result in
no change in the screen mode.  the interrupt list documents
mode values up to around 70, but any over 11 have no effect.
is there something i'm missing, something i've done wrong, or
is this mode not available for use?  the machine is 386 based
with VGA graphics.

any help would be greatly appreciated.
brian