Re: NadaNet and AppleCrate

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

Glenn Jones wrote:

>> I encourage others to think about other interconnects and how
>> they might be used to extend the "laboratories" of our Apple II's.
>>
>
>I read your descriptions of bit bashing but I am not complety clear on what
>you are saying ... when you get a chance ..tying that to some code examples
>would be much apprciated ...
>
>:O)  Glenn
>
>and I will go back and read it a few more times   ...

You are correct, the documentation was meant to supplement the
code, not describe it completely.

I'll try to get the SENDPKT and RCVPKT source up on the web
page pretty soon, and you can look it over.

The basic idea is that by referencing the softswitches to turn
the selected (AN1) annunciator on and off, one can send a
signal with transitions timed precisely by the LDA or STA
that is used to flip the softswitch.

On the receiving end, one can sample the current value of
the pushbutton input (PB1) at precise times and shift the
values into a data byte.

The trick is doing it fast, and doing it so that synchronization
is maintained between the sender and the receiver.

-michael

Check out parallel computing for 8-bit Apples on my
Home page:  http://members.aol.com/MJMahon/