Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!pasteur!ucbvax!TOR.NTA.NO!e_holen%vax.runit.unit.uninett
From: e_holen%vax.runit.unit.uninett@TOR.NTA.NO (Endre Holen)
Newsgroups: comp.sys.apollo
Subject: Writing device drivers
Message-ID: <66*e_holen@vax.runit.unit.uninett>
Date: 6 Apr 88 09:59:00 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 12

I want to write a device driver to a graphics board that sits in the AT-compatible bus in a DN3000. The driver should only do the following :
Read and write to the Status port 
Read and write to the data port 

These two ports are at base adress and base+2 .

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.

Has anybody done something similar ?

Endre Holen
Super Computing Centre
University of Trondheim