Tim,
The base address is 0x378. I had my BIOS set up to use IRQ 5 for the parall=
el
port, but when I changed that to IRQ 7 and made the driver use the same IRQ
the performance drastically increased!
It's weird that it's so slow using IRQ 5, while for as far as I know there a=
re
no conflicts with that IRQ.
Anyway, thanks a lot for your help!
Best regards,
Alex Adriaanse
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Date: 27 Jan 99 00:46:56
From:Tim Waugh <tim@cyberelk.demon.co.uk>
To:Alex Adriaanse <AMADRIAA@us.oracle.com>
Subject:Re: Horrible parport performance when IRQ enabled
Cc:linux-kernel@vger.rutgers.edu
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On 26 Jan 1999, Alex Adriaanse wrote:
> When I load all these modules the printing is fast, but when I enable
> interrupt-driven operations through procfs or by specifying irq=5 when I load
> the parport_pc module, the printer performance becomes horrible. It prints
> for a few seconds, then pauses for about a minute, then resumes for a few
> seconds, etc.
Are you sure that the IRQ is 5? What is the port's base address? You
might want to see if 7 works any better.
Tim.
*/
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