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Re: NEC VR4181A

Subject: Re: NEC VR4181A
From: Stuart Hughes <>
Date: Fri, 14 Feb 2003 08:41:14 +0000
Cc: 'Jun Sun' <>,
Organization: MetroWerks
Original-recipient: rfc822;
References: <02c101c2d362$f9e2eed0$3501a8c0@wssseeger>
Steven Seeger wrote:
> >Osprey uses Vr4181, which is a different chip from vr4181a.
> >Interesting.  I was trying to get RT-Linux working at one time
> >but aborted that effort in the middle.
> Getting RTAI working wasn't easy. Took over a week and it was supposedly
> already "ported." One of these days I really must find the time to check in
> my changes to that project. It works very well and is quite stable. I think
> 46 us worst-case interrupt response off one of the VR4181's interrupts from
> an external source is very good.

Hi Steve,

Can you send what you have (or a patch) to Paolo at the rtai mailing
list, then he can merge this in with the existing mips stuff that's in

Regards, Stuart

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