Re: IIgs and OS X filesharing solutions

[mjmahon@aol.com (Michael J. Mahon)]

Lee Cremeans asked:

>Rob Steinmetz wrote:
>
>> Michael J. Mahon wrote:
>
>>>
>>> But I stick to my contention that 64KB addressing will make
>>> a set of TCP protocols quite difficult on an 8-bit Apple II.  (OK,
>>> that's the invitation for someone to prove me wrong.  ;-)
>>> 
>> 
>> Contiki runs of the 8 bit Commodore 64 and several other 8 bit machines. 
>> A TCP IP stack is possible, if someone would only port it to the Apple 
>> ][. I wish I had enough programming knowledge to tackle it.
>
>Last I heard, Chris Morse was working on it, but the question of how to 
>get an interval timer into the II was brought up; I don't know if this 
>was ever resolved.

AFAIK, no clear need was ever demonstrated to port Contiki, since
it was only used for approximate timeouts.

If a 60Hz "heartbeat" interrupt is needed, using VBL to generate
an IRQ is the easiest way (of course, you'd probably want to use an
annunciator to gate it so software could enable it only when needed).
That would be 1 DIP and five wires, including power.  A VBL interrupt
would also be useful for animation, and was implemented in the IIc.

A slot plug-in solution is a little more complex to build (using a counter
chain), but easier to install.  Probably easier just to use a mouse card.

-michael

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