Re: TI-82 Bug
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I tried this on my ROM 18 and I got lots of different things happening.
Also at my school they have TI-82's with ROM 19, this bug does not work
with them.
When I put a program in memory first sometimes when it messes with the
memory I looked at the program and it had some weird symbols in it.
I hope you can find a way to use asm on it. Bye
---------------------------------------------------------
Andrew Brenner
aibrenner@juno.com
abrenner@hotmail.com (attachment mail)
On Sun, 27 Oct 1996 01:53:03 GMT GTS <gts@CAIS2.CAIS.COM> writes:
>after quite a bit of testing, i'm writing preliminary reports on an
>interesting TI-82 bug. i'm doing this so some of you with more time
>out
>there can see what can be done with this.
>
>WARNING: testing this will most likely cause the loss of ALL memory on
>your calculator
>
>now, if you put an equation in Y1 (i don't think the actual equation
>matters, just its existence), then use the shade command, and break
>the
>SHADE as it is drawing the graph of the equation, you can get some
>very
>interesting results.
>
>for example:
>Y1=X
>Shade(1,1,7 //no closing parenthasies.
>then hit ON to break the function as it is displayed, the message "Mem
>cleared" appears on the home screen, with a blinking cursor, and the
>program indicator (the line in the upper right hand corner of the
>screen)
>is running, indicating that there is some program in prgress. here's
>the
>kicker: the memory isn't cleared!!
>-the first two digits of the shade command don't seem to matter, but
>the
>third digit can be either a 4,5,6, or 7, to get interesting results.
>5
>just locks up the calculator, 4 puts a cursor on the graph screen, and
>displays the current x-coordinat in small type somewhere on the screen
>(it
>varies). 6 does many different things. occasionally, it returns me
>to
>the home screen and displays the number 3.2E-128 in small type with a
>regular cusor below.
>occasionally, after doing one of the above, if you look at the memory
>information, it will say that there are between 22000 and 65000 bytes
>of
>programs, with 28000 bytes free, but there won't be any programs in
>the
>PROG menu!! if there are about 22K bytes in programs, and you run the
>Shade(1,1,6. then break it and repeatedly hit last entry, you will
>get a
>huge memory dump to the screen, faster than the display or output
>functions could ever do it. once, i got random horizontal lines
>appearing
>and disappearing on my screen, probably 10 or 20 lines flashing per
>second!
>
>some believe it possiblle to somehow enter assembler commands/mchine
>code
>using this bug.
>i would appreciate any information regarding this bug, and i encourage
>all
>to experiment (BACK UP YOUR MEMORY FIRST!!!!!!!!!)
>it has been known to work on ROM version 16 and 18, i haven't tried
>others.
>i take no responsibility for harm to your calculator.
>
>any feedback is welcome at msimmons@lan.tjhsst.edu with subject:TI-82
>bug.
>have fun
>
>--
>gts@cais.cais.com
>
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