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Path: utzoo!mnetor!seismo!rutgers!cbmvax!carolyn
From: carolyn@cbmvax.cbm.UUCP (Carolyn Scheppner CATS)
Newsgroups: comp.sys.amiga
Subject: Re: gameport
Message-ID: <2021@cbmvax.cbmvax.cbm.UUCP>
Date: Fri, 12-Jun-87 18:16:57 EDT
Article-I.D.: cbmvax.2021
Posted: Fri Jun 12 18:16:57 1987
Date-Received: Sat, 20-Jun-87 18:38:24 EDT
References: <431@milob.UUCP>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner CATS)
Organization: Commodore Technology, West Chester, PA
Lines: 30

In article <431@milob.UUCP> ds@milob.UUCP (David Sanborn) writes:
>
>[]
>The fire button pin 6 of port 1 (right port) is connected to bit 7 of cia A.
>Bryce Nesbitt not long ago posted information from the RKM about the 68000
>structure for accessing cia.resource. How do you do it from C ? (ie. the
>equivalent structure in C). I should be able to OpenResource("ciaa.resource")
>then read and write this bit much like you can (atleast now) the PotGo bits
>(pins). Can I access the other input pins (pin 4) without using the 
>gameport.device?

  Not too long, Phil Lindsay posted a parallel resource example which
used both the misc.resource and the cia.resource for safe direct control
of the parallel port.  His example could probably give you the shell
you need.  Check out comp.amiga.sources (?) - it may be there.  It is
also on Fish Disk #73.

  The cia register definitions, by the way, are in the 1.2 header
hardware/cia.h.  I believe you declare (for instance)

extern struct CIA ciaa;

and reference registers like:  c = ciaa.ciaprb

-- 
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Carolyn Scheppner -- CBM   >>Amiga Technical Support<<
                     UUCP  ...{allegra,caip,ihnp4,seismo}!cbmvax!carolyn 
                     PHONE 215-431-9180
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