Re: Ti-86 wierdness


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Re: Ti-86 wierdness



Yeah, that's exactly what I thought.  Here's what this guy e-mailed me:

About 86's sending programs to 85's... TI did _not_ intend for programs
to be sent this way. Think of all the extra commands that an 86 has that
an 85 doesn't! Attempting to execute these commands on an 85 would
probably lock up the calculator.

I told him syntax error or undefined variable error is the only thing that
would happen.  He replied:

However, you are incorrect in
assuming that it wouldn't lock up; if incorrect TI-BASIC is executed it
can very well lock up the calculator (I've done it by changing a single
byte in a program)

I figured he was full of it, but it's fun knowing that you've proved me
right.

>I have looked at your [excellent] FAQ.  Without actually going through
>that process of doing all that you mention,  I can tell you that I have
>found no commands that are 86 specific that harm the 85 in anyway.
>Logically, you could make the arguement that TI could not know the
>commands that they would be putting into the 86 when they made the 85,
>so why would anything be put into the rom about them?
>
>For example, if a program transferred to the 85 had the command PlOn (an
>86 only stat command), the 85 would error with 07 ERROR SYNTAX.  Unless
>the 85 had a variable named PlOn.  Then the variable would be put into
>the Ans variable.  If there was a program on the 85 named PlOn, it
>would  be exucuted as a sub-program.  The 85 does not crash.  I have
>tried it.
>
>I hope I answered your question,
>Todd

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