Re: Rabbit 4k and ethernet
- From: "Monte Dalrymple" <monted@xxxxxxxxxxxxx>
- Date: Mon, 30 Jul 2007 21:09:31 GMT
"larwe" <zwsdotcom@xxxxxxxxx> wrote in message
news:1185828601.273164.59500@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jul 30, 4:32 pm, "Monte Dalrymple" <mon...@xxxxxxxxxxxxx> wrote:
The source code for the tcp/ip stuff is included, so it will be
[puzzlement] What parts of it are closed-source then? When I was
negotiating putting one of the Rabbit parts into a design, I was told
that various stuff (e.g. SSL) had been hand-optimized for specific
Rabbits, and couldn't be ported to other Rabbit parts.
It's not that it's closed-source, it's that some modules (SSL being the
one that I am aware of) use features that are not backwards-compatible
between generations. In particular, SSL uses the "array multiply"
instructions when targeting the R3000A or R4000. These instructions
were designed specifically for this application. Duplicating their
functionality in an R2000 or R3000 would be non-trivial if starting
from the source code targeted at the later parts.
Monte
.
- References:
- Rabbit 4k and ethernet
- From: sanjaysalunke1975
- Re: Rabbit 4k and ethernet
- From: Monte Dalrymple
- Re: Rabbit 4k and ethernet
- From: larwe
- Rabbit 4k and ethernet
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