[Contiki-developers] Atari Contiki Port & Ethernet Cart

[<tx...@xs...>]

>Well, the Atari Ethernet Cart prototype is somewhat working now.  (I know
>most everyone here is concerned with the C64, but I do have a few
>questions.)
>
>Here is what I have working:
>(1) Contiki 1.0 (with ctk-conio & telnet app only) with an Atari 130XE and
>an embeddedether.net cart prototype.
>(2) The Atari connects in Half duplex only for both 10 and 100.

This is very cool! I did play around with that together with Christian a
longtime ago but I couldn't get it to work well...
I used an embedded-ethernet controller based on the CS8900A chip.
What did you use and what's the price? Mine is 10Mbp and did cost about
$75.00 excluding shipping...

>(3) I am able to ping, but not every ping packet returns.  And, when the
>ping packets do return it takes approximately 20ms. (Not too bad, really.)

No that's pretty good...

>(4) I am able to telnet out, but it disconnects after about half a screen
>full of text (but this could be because of collisions in half duplex or
>the dropped packets).

Hmm there are a few things that could cause problems I think. My version
with the CS8900A chip was using polling instead of interupts. This way it
could work in 8-bit mode. The problem is that on the 8-bit the Antic
steals about 30% cpu time and in this time no polling is done. This caused
the miss of packets I think. Maybe there is a good way to stop the
ethernet controller from recieving data when the processor is halted.
Secondly could you send me a schematic of this. I would like to help you
by testing it aswell.

>Is there a way to force 100full mode?

This is very useless I think, 10Mb/half duplex is already hard enough I
think... You never can send more then 50Kb/sec max on an 8-bit... would
even be slower I think 2 - 5 kb/sec would be max.

>
>Many thanks to Christian Groessler and to all who have helped so far!
>
>--Chris

Yes Christian I didn't know about this project but seems to go to the
right direction. As you know there is now this incredible Flash-cartridge
(1Mbyte flash) available. Http://www.atarimax.com my idea was when an
ethernet version would be working to make a full software package for such
cartridge and build the ethernet controller inside the cartridge aswell
:-)