Re: TI-H: ti-calc schematics...
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Re: TI-H: ti-calc schematics...
Does that mean it uses some kind of MUX to transfer data? Rather
than a straight serial connection...
I guess that way you keep synchronization with the same clock speeds...
On Sun, 12 Jul 1998, Greg Hill wrote:
> There are three wires. One is a ground, used as a reference so the
> receiving calculator can tell if a signal is high or low. One of the wires
> represents a binary "1", and the other represents a binary "0". In other
> words, if the sending calc wants to send a "1" bit, it will take the "1"
> line low (0v) and wait for an acknowledgement (the receiver pulls the "0"
> line low). If the sending calc wanted to send a "0" bit, it would take the
> "0" line low and wait for the receiver to pull the "1" line low to
> acknowledge. I haven't had time to figure out which line is which,
> though..
>
> A series of 8 bits will be reassembled into a byte at the receiver, and
> then the discussion steps up to the actual protocol level. It's discussed
> in the documents I mentioned on ticalc. I think there is one called
> linkprot.txt and should be in the same place as the port7 stuff.
>
>
> On Sun, 12 Jul 1998, Eric M. Fiterman wrote:
>
> > What exactly is the TIP? Can it be changed at the assembly level?
> >
> > > No. Its TIP (TI PROTOCALL)
>
> --
> Greg Hill
> greg-hill@bigfoot.com
> www.comports.com/link
>
>
>
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