[Coco] Arduino question

[Mark Ormond]

Arduino is actually based off the Atmel AVR line. The standard is a MEGA8 and there is a MEGA version based on the ATmega2560.
There is talk of making a ARM based board that will work with some of the shields. The Ethernet is actually based on the Wiznet 5100 series chip that
Has the entire ip stack in the chip.

Here are the features of the wiznet.


Support Hardwired TCP/IP Protocols : TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE, Ethernet
 10BaseT/100BaseTX Ethernet PHY embedded 
Support Auto Negotiation (Full-duplex and half duplex) 
Support Auto MDI/MDIX 
Support ADSL connection (with support PPPoE Protocol with PAP/CHAP Authentication
 mode) 
Supports 4 independent sockets simultaneously 
Not support IP Fragmentation 
Internal 16Kbytes Memory for Tx/Rx Buffers 
0.18 μm CMOS technology 
3.3V operation with 5V I/O signal tolerance 
Small 80 Pin LQFP Package 
Lead-Free Package 
Support Serial Peripheral Interface(SPI MODE 0) 
Multi-function LED outputs (TX, RX, Full/Half duplex, Collision, Link, Speed)

So the arduino libs make it easier to use, but the real Ethernet magic is in the wiznet.

-----Original Message-----
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On Behalf Of gene heskett
Sent: Sunday, October 02, 2011 3:02 PM
To: coco at maltedmedia.com
Subject: Re: [Coco] Arduino question

On Sunday, October 02, 2011 02:39:11 PM Mark Ormond did opine:

> It's using the wiznet chip on the Ethernet shield.
> (I've got one of the original run that's a little different)
> 
> That alone is 45.00 over at sparkfun.

Are you at a place where you can talk about it?  I was under the 
impression, really from reading between the lines, that it was 100% flash 
code and a few of the arduino's relatively plentiful i/o pins.  Probably 
with the ethernets broadband baluns of course.  Arduino is I believe an ARM 
product, and ATM the ARM branch of linux seems to be the subject of a huge 
development project, with the ARM builds being every bit as functional as 
the X86 builds.

One of the problems with any of this much faster than the coco stuff is the 
coco's own limited memory bandwidth, which might be slightly alleviated by 
adding a DMA controller to the coco, something that gets smack in the 
middle of the hardware to be sure, but the only real problem would be the 
IRQ's, and the dma cycles delaying them.  I do not believe this can be 
accomplished from the game port as those pins on the 6x09's aren't normally 
tied to any active circuitry.  Nitros9 would of course need a new module to 
tie & sync the dma, which I'd assume would need at least 4 more getstt's 
and setstat's in order to handle the memory allocations and notices thereof 
to processes that would use the DMA'd data.

One of the enticements to look at ARM is the processing power per watt of 
power consumed, it is easily 10x more efficient than current X86 cpu's. 
90mhz chips use less than a watt from what I've read.

? for Steve B. How do the arm chips stack up to your stack test?

> Later,
> Dabone


Cheers, Gene
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