Re: TI-H: fargo fterm
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> >The internal ROM routines on the 85 (and probably the 92, given that it
> >uses the same GRAPH-LINK cable and CBL as the 8x series calculators) use
> >one line for DATA and the other line for ACK (which is which depends on
> >the bit currently being sent).
>
> Well that's close. Both lines are used to send and receive data. The 'W'
> is a "1" and the 'R' is a "0" (I think that is the order). If you send a 1,
> the W wire is pulled low. The receiving end acks the bit by pulling the R
> low. Then, both ends release both lines to high. This completes the
> transmission of one bit. Now if you are sending a 0, the R wire is pulled
> low. The receiving end acks the bit by pulling the W low. Then, both ends
> release both lines to high again.
You guys are saying the same thing. :)
He is saying the DATA line for a "1" is 'W', and therefore 'R' is the
ACK. The DATA line for a "0" is 'R', and therefore 'W' is the ACK.
(The "1" and "0" lines might be reversed in my explanation. I was
just trying to rephrase what you said.)
shakal@ns.net
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