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To: "'Jun Sun'" <>
Subject: RE: NEC VR4181A
From: (Steven Seeger)
Date: Thu, 13 Feb 2003 05:22:36 -0800
Cc: <>
Importance: Normal
In-reply-to: <>
Original-recipient: rfc822;
Reply-to: <>
>Osprey uses Vr4181, which is a different chip from vr4181a.

Yeah I didn't notice the A on there. We are looking into the possibility of
using the A in our board. Part of the problem is that the A only comes in
BGA and we don't like dealing with that.

>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.


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