On Sun, 6 Dec 2009, Maximilian H wrote:
> Date: Sun, 06 Dec 2009 21:15:15 +0100
> From: Maximilian H <mhemc2nos...@googlemail.com>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <emc-users@lists.sourceforge.net>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] What parport chipsets are working ?
>
>
> Hello Peter,
>
> why is the linux pp driver important with the pci parallel port card ? I
> mean I have disabled the parport_pc, parport, ppdev and lp modules in
> /etc/modprobe.d/emc2, so these pci parallel ports do not get claimed by
> the linux pp driver at all. Or am I missing something ?
The problem is that with add-in PCI parallel ports, you somehow need to set
them to the proper mode (EPP in this case) Unfortunately for some parallel
chips this requires chip specific register frobbing, and often all the card
comes with is a windows driver (and chip documetation is hard or impossible to
get)
>
> I'll try to get a SUN1888 and an Oxford PIC952 based card tomorrow
> morning, then I can test, the cable length of <2 feet is not a problem
> for me at all. Problem is that all "normal" shops around have these darn
> moschip based cards.
Ya, with MosChip it looks like a case of the bad pushing out the good....
>
> Cheers
> Max
>
>
>>
>> I suspect the reason that the linux PP driver has troubles is related to
>> this.
>>
>> That is, on many chips, theres no good register level setup information for
>> selecting different modes.
>>
>>
>>
>> Peter Wallace
>> Mesa Electronics
>>
>> (\__/)
>> (='.'=) This is Bunny. Copy and paste bunny into your
>> (")_(") signature to help him gain world domination.
>>
>>
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>
>
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Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
------------------------------------------------------------------------------
Join us December 9, 2009 for the Red Hat Virtual Experience,
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