On Fri, Apr 14, 2000 at 01:44:19PM +0200, Sylvester Drozdik wrote:
> David Schleef wrote:
>
> > How are you slowing down IO? Linux has macros specifically for
> > this, that is, outw_p() and inw_p(). This slows down ISA I/O by
> > putting a fake bus access after the real one, which is useful if
> > the board can't handle back-to-back I/O.
>
> For slowing down, I tried outw_p ( with and without REALLY_SLOW_IO defined)
> - nothing.
> Also tried three methods (below) with or without input command (before
> or/and after output) - nothing. I adjusted the WAIT STATE jumper on the
> board - nothing.
You said that you are using a PCL-823. Did you mean PCL-832?
Have you tried a really long wait, e.g., 1 ms or more? Then you could
methodically decrease the wait to see if there is a limit. Also, a
very long wait will show if this is a timing problem, or a problem
with the order or way that outw() is called. It's hard to tell with
neither a board nor full source.
dave...
-- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
---
For more information on Real-Time Linux see:
http://www.rtlinux.org/rtlinux/
