Path: utzoo!mnetor!uunet!husc6!uwvax!umn-d-ub!umn-cs!shamash!rosevax!pwcs!stag!trb
From: trb@stag.UUCP ( Todd Burkey )
Newsgroups: comp.sys.apollo
Subject: Re: Writing device drivers
Message-ID: <372@stag.UUCP>
Date: 10 Apr 88 18:57:55 GMT
References: <66*e_holen@vax.runit.unit.uninett>
Reply-To: trb@stag.UUCP ( Todd Burkey )
Organization: Mindtools ST Access Group, Plymouth, MN
Lines: 21

In article <66*e_holen@vax.runit.unit.uninett> e_holen%vax.runit.unit.uninett@TOR.NTA.NO (Endre Holen) writes:
>
>The documentation for using GPIO calls are rather poor, (or maybe I am stupid), but I have a bit problems with finding out how to get access to the CSR page.
>
I have had similar problems dealing with the Aegis GPIO docs. For the
life of me, I can't figure out how to get the PBU Control call to work
correctly (I want to swap words). All I can figure out is that it may
be a NOP command when combined with the PBU map controller command
(the 20 bit call option...I am writing this from home, so can't
remeber the exact call syntax's). The docs reference manual made no
mention of what sequencing was necessary for the calls and the example
sets didn't include the swap words/bytes options. Guess I will have to
break all my datastructures down to the

a.xref_point.value.up:=b.point.value.up
a.xref_point.value.lo:=b.point.value.lo

level of coding...what a waste.

-Todd Burkey
 trb@stag.UUCP