John Ruschmeyer wrote:

> I think it was actually this one:
> 
>     http://www.zilog.com/docs/z180/loctalk.pdf
> 
> entitled "Technical Considerations When Implementing LocalTalk".

Perhaps I read that document incorrectly, but doesn't it give a basic 
assembler version of how to manipulate the serial chip to do localtalk 
transactions? I think the missing pieces have more to do with the 
link-layer's frame information and other "software" style concerns.

Basically, couldn't this be used as a foundation for a really crude 
LocalTalk link-layer? If we had such a layer, wouldn't that be all we 
need to get AppleTalk over LocalTalk, since we already have the Network 
and Transport Layers for Appletalk?