Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!ucbvax!ICAEN.UIOWA.EDU!dbfunk
From: dbfunk@ICAEN.UIOWA.EDU (David B. Funk)
Newsgroups: comp.sys.apollo
Subject: Re: pbu_$enable_device problem
Message-ID: <8904080705.AA00567@icaen.uiowa.edu>
Date: 8 Apr 89 06:51:08 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: Iowa Computer Aided Engineering Network, University of Iowa
Lines: 20

WRT posting 8904071351.AA02833@umix.cc.umich.edu>,

Scott,
    You say that you are having GPIO problems with a DN4000 & sr9.7,
two questions:

1)  Is it sr9.7 or sr9.7.some.thing (such as sr9.7.0.4 or sr9.7.1.2)
    There is a patch tape out to fix some bugs in sr9.7 (no suffix)
    related to I/O & DMA problems. If you have sr9.7 (no suffix), I
    recommend sr9.7.0.4 (patch #133). Don't use sr9.7.0.6 (patch #143),
    it introduces a bug that can cause it to crash when you try to
    mount a floppy volume.

2)  Do you have the correct GPIO manual? You should be using manual
    000959 Rev 10, plus the DN4000 update pages (or newer?). The older
    manuals (including rev 10, sans update) only have the DN3000 GPIO
    calls. The DN4000 (and DN3500, DN4500) must use a different set
    of GPIO system calls for DMA because it has an I/O page map.

Dave Funk