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Re: Virtual serial drive

Egan Ford wrote:
> On 9/6/12 5:43 PM, David Schmidt wrote:
>> The firmware?  The firmware of what?  ;-)
> 
> I assumed that Uthernet had some type of firmware.
>

It's entirely controlled by the $Cxxx I/O addresses. The real work is done
by the IP Dragon module whose data sheet is following. It's got a 4K on-chip
buffer, and from the Apple, you poke a byte at a time to send an Ethernet
datagram, or peek a byte at a time to read a datagram.

http://www.invector.se/downloads/IET8900DOC.PDF

The rest of the Uthernet card is just an interface to the Apple II bus. 

-- 
]DF$
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