On Thu, 2002-10-24 at 10:23, Adam Sulmicki wrote: > > Some part of it comes form old sample code by our BIOS guy. Most of it > > from "The undocumented PC" by Van Gilluwe. > > sigh. I hoped for a datascheet. > > so there's no a definite reference then? > It is legacy device which remain unchanged over the 80s and 90s. I think the original datasheet were all gone. Ollie