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From: Søren Schmidt <sos@sos.freebsd.dk>
Message-Id: <199708060637.IAA01471@sos.freebsd.dk>
Subject: Re: Parallel port bus code?
In-Reply-To: <199708060142.LAA01723@genesis.atrad.adelaide.edu.au> from Michael Smith at "Aug 6, 97 11:12:11 am"
To: msmith@atrad.adelaide.edu.au (Michael Smith)
Date: Wed, 6 Aug 1997 08:37:41 +0200 (MEST)
Cc: terry@lambert.org, msmith@atrad.adelaide.edu.au, hackers@FreeBSD.ORG
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In reply to Michael Smith who wrote:
> Terry Lambert stands accused of saying:
> > > Looks like it's my week to be ignored.  I've had exactly one response
> > > to my announcement last week of the new parallel port 'bus' code. 
> > > 
> > > Should I take this as an implicit go-ahead and splat it in?
> > 
> > If you think it works, I'd say "go for it".  Have you worked out
> > any PLIP/ZIP-driver/LAPlink issues already?
> 
> The current ppbus code layers so :
> 
> 	+--------------+---------+-----+------+
> 	| ppa3/vp0/Zip | new_lpt | ppi |  ??  |
> 	+--------------+---------+-----+------+
> 	|        ppbus primitives             |
> 	+--------------------+----------------+
> 	| ppc (ISA chipsets) |        ?       |
> 	+--------------------+----------------+
> 
> ppc	ISA parallel port access code	(works, need more chipset support)
> ppbus	Bus code			(works)
> ppa3	Parallel Zip driver		(works)
> new_lpt	Traditional printer driver	(works, polled mode only)
> ppi	User-space parallel port access	(under development)

NICE !!

> Notably, there is no 'lp' replacement yet.  The new code will coexist
> (but not share ports) with the old 'lpt' driver, so I think it's time
> to give it some wider exposure, particularly if this shakes any more
> bugs (or developers) out.

Well, I use an awfull hack here to communicate with small LCD displays
via the parallel port, this seems like the opportunity to get some
support for that too..

> 	ftp://smith.net.au/ppa/ppbus-970730.tgz

I'll take a look..
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt               (sos@FreeBSD.org)               FreeBSD Core Team
                Even more code to hack -- will it ever end
..