Re: A85: x-stat and delete protection
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Re: A85: x-stat and delete protection
you are correct. ive done this a couple times. i like to use &name, jsut
for usgard similartiy, although it means nothing similar at all, so it
doesnt really matter :)
kaus
----- Original Message -----
From: Richard Lewis <RichardLewis@CedarCity.net>
To: <assembly-85@lists.ticalc.org>
Sent: Thursday, March 04, 1999 6:59 PM
Subject: Re: A85: x-stat and delete protection
>
>If you make the first character of any variable a number, or any character
>the TI-85 won't let you use in names, it will hide the var. It won't even
>create a problem anywhere. That's why ! and # are hidden.
>
>At 07:17 PM 3/4/99 -0500, you wrote:
>>
>>The problem with xStat and yStat is that most of the statistical data is
>>stored in the user mem, and even though you can use them as normal vars
they
>>are not located in the VAT. The only exception to this is xStat and yStat
>>which can not be stored in the user mem because the length of both of them
>>can change, and they can be very long. I have never tried to hide
variables
>>my self, but by playing around with the VAT data it might be possible to
do
>>so. The only thing I can think of is trying to make the var start with a
>>wierd char, but what effect that has I dont know. Just do not try to
change
>>the length of the name to something >8, there is a loop in the ROM which
>>will make the calc hang if this is detected (it does a jr $ if length of
>>name is >8).
>>
>>Dines
>>----- Original Message -----
>>From: Richard Lewis <RichardLewis@CedarCity.net>
>>To: <assembly-85@lists.ticalc.org>
>>Sent: Wednesday, March 03, 1999 12:37 PM
>>Subject: Re: A85: x-stat and delete protection
>>
>>
>>>
>>>That won't work. It's not an area of memory that's special, but the
>>>varibales are. Ans, xStat, yStat, #, and ! all have special status on
the
>>>85. They cannot be deleted. # and ! are invisible, too.
>>>
>>>If you play with a shell backup, you can delete the shell. It's located
as
>>>the very first variable in the RAM.
>>>
>>>At 10:23 AM 3/3/99 -0500, you wrote:
>>>>
>>>>> Just a quick question, but one that has the potential to
>>>>> be useful. I know that the x-stat and y-stat lists
>>>>> can't be deleted on the TI-85, although you can still
>>>>> edit them. What I want to know is if there is a way to
>>>>> add this attribute to other variables, either on a
>>>>> computer or through an assembly program.
>>>>I'm going out on a limb here, but from what I remember of
>>>>hand-hacking the 85 oh so many years ago, xstat and ystat
>>>>live very close to the bottom of the variable heap and
>>>>probably have priveleged status. It's right up there with
>>>>Ans.
>>>>
>>>>Now, there *might* be some way to do this, if you manage to
>>>>push your program to that general area and change something
>>>>which defines where the "normal" heap starts. I'd say the
>>>>only thing to do is to try it. Dump a backup to your
>>>>computer and start twiddling the bits in a hex editor.
>>>>
>>>>--Jon, N9RUJ jnieho38@calvin.edu www.calvin.edu/~jnieho38
>>>>`finger jnieho38@calvin.edu` for geek code block.
>>>>
>>>>There are only two products to come out of Berkely:
>>>>UNIX and LSD.
>>>>We don't believe this is a coincidence.
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>>
>>
>
>