You can find this project, connecting a CS8900 to a PIC, at
www.embeddedethernet.com , last I checked.

Also, the PicoWeb uses the RealTek 8019 chip, which seems to be in most
every cheap-o Ethernet card out there. Supply shouldn't be too much of a
problem for it.

-Randy Glenn
PICxpertANTISPAM@techie.com (remove ANTISPAM)
http://i.am/PICxpert

"My Finder has died of fits, chokin',
My Finder has quite ceased to be.
OS X's new Finder looks broken,
Please bring back my Finder to me!" - A concerned Mac user

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-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of David Kott
Sent: Monday, May 08, 2000 1:13 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: [PICLIST] EtherNet with a PIC (Was: PIC > NE2000 [OT])


> I've seen a project on Circuit Cellar that used a microcontroller
connected
> directly to a NE2000 card making it network-enabled, but there were
> insuffecient circuit and firmware details to build one (some of the
project
> was proprietary).
>
> Does anyone have the pin/signal details for a standard NE2000-compatible
> card, and perhaps the command set for setup and tx/rx? I can make my way
> through the Linux drivers I find on the net (that's all the info I find
> software-wise), but none of those offer detailed explanations of the
> signals or commands.
>
> JB
>

I saw a circuit for a Crystal Semiconductor CS8900 standalone ethernet
interfaced directly to a PIC16C74.  I don't know much about the host
interface to a NE2000 NIC, but, I don't think the CS8900 is compatible.  At
least the documentation on the device said nothing about NE2000
compatibility.
If simple ethernet connectivity is what you are interested in, you may want
to look at this IC.  Basically, the CS8900 is a highly integrated single
chip10bX ethernet NIC.  Two of the very nice things about this package was
the integrated 4 K of onboard RAM, and integrated bus drivers.  You didn't
need any external RAM or much of it on your microcontroller, and only a
simple surface mount transformer and you have a NIC capable of residing on a
10b2 network.

You can get  information about the CS8900 here at
http://www.cirrus.com/ftp/pubs/8900.pdf

You may also wish to look at Ethernet Controller Technical Reference Manual
at http://www.cirrus.com/ftp/pubs/an83.pdf

The creator of this design used a PIC16C74, just because "... becuase it had
the needed 16 I/O pins and I had a few here on hand..."

The design and code he supplied generated an ICMP echo reply when pinged.
This is really pretty sophisticated and an excellent place, IMHO, to start.

The website that used to host this gentleman's pages no longer has them
available.

I serendipitously mirrored the pages before they disappeared.  The bottom of
the page listed his contact information as "Gary T. Desrosiers
desrosi@pcnet.com"

He used to sell unstuffed PCB's for mounting the '8900 and support hardware
for the reasonable price of US $59.00.  I purchased one, but the project
acquired a lower priority and I wasn't able to finish debugging my proto.

-d


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