[Ti-83plus Asm Utilities] Teacher Guard

[pugboy]

File Name :: Teacher Guard
Author :: pugboy
Category :: Ti-83plus Asm Utilities
Screenshot :: [img]http://www.unitedti.org/index.php?act=downloads&do=imgss&id=326[/img]
Description ::
Features
--------
1. A fake RAM Reset Screen
2. A fake Mem Reset Screen
3. Both with YOUR calculator model and OS version
4. No entries faker
5. Fake Prgm and Apps menu that behave normally (Create programs, use the Finance app)
6. Compatibility with the TI-nSpire 84+ mode (Will show correct OS, but not "TI-nSpire" above 84+ Silver)

NOTES
-----
Teacher Guard will NOT protect from RAM clears through the memory menu, and will NOT show a fake memory menu. Both of

these features are for the next release.

I am not responsible for any calculator confiscation if this App fails to work or crashes.

Updated Sun, Jan 27 2008 12:12 am

View File

[pugboy]

Now updated to 1.51:

Will fake memory clears from the memory menu

Also, if I how do I update this in the archive? :blush:


[attachment=2144:attachment]

[luby]

Pm it to Darkerline. Also, bug him to make it an automated process to update files.

[DarkerLine]

The file archive system already has an update feature. Unfortunately, if I let people do that, they invariably set the "remove file" option (after all, if you're adding a new file, you're removing the old file, right?) which messes up the file so no one is able to download it. To prevent people from doing this I disabled that option.

A new file archive system would fix this and other problems.

[pugboy]

Ok then... The file is attached

[Igrek]

I'm currently working on a similar project (when I have time...), which will be called 'Admin'. It has the following features:
-Fake RAM and full MEM reset from the reset menu (works correctly even on Npire)
-Hiding all variables (strings, real, list, prog,...) + Store last Entry, current Entry and Ans. => 'Fake' Matrix/Prog/List menus
-Creating variables without any problems (even if the variable with the name already exists). => All variables are erased (not the hidden) when you are going back to unhidden mode.
-Fake free RAM/Arc which changes when you create/archive a file.

Yet to implement:
-Fake arc-variable resets (Medium)
-Fake appsmenu (easy)
-Hide apps from variable menus (Hard)
-Disable/reenable hooks (Medium)
-Avoid reserving apps (or do something else about it).

If you have questions about how I did/planning to do something, mail me.

[Ph34r_my_l33t_skillz]

When I do fake mem clear, it shows "R" up in the corner... [s]and it doesn't work with CalcUtil[/s] (OK nevermind. I didn't chain the hooks). But other than that, it's a rly cool app.

[pugboy]

Oh! I thought I fixed that... One sec, and I will reupload.

Great... When you press "No" on the memory menu, it will still fake reset.

I would like to learn how to hide programs and apps instead of a fake menu, so I wouldn't have to make a complicated fake mem menu... (Like brandonw's Fake Reset app, but without messing up the VAT)

[magicdanw]

I wanted to do the same thing with my AntiClr application a while ago, but eventually I gave up. I just have fake program and app menus, and I don't do anything for the memory menu. I think the only ways to hide programs are to mess with the VAT, and you can't even hide apps. You'd have to just write a complicated memory menu.

[JoostinOnline]

[pugboy]

The whole VAT

You have to do a RAM reset or your calculator will do it for you.

[JoostinOnline]

I don't remeber having a problem with it :confused:
Are you sure you used the latest version, and that you used the code to get out of it?

[magicdanw]

Regardless of whether the VAT is "messed up," the fact is that you can't hide programs without modifying the VAT, and applications can't be hidden at all (since they aren't named in the VAT, but rather in their first page, which is read-only of course.) So, the only solution (I'm 99% sure) is to write fake menus.

[Ph34r_my_l33t_skillz]

[pugboy]

No. Omnicalc will uninstall this App if you install Teacher Guard first... I would have to learn how to chain hooks, or wait for the 2007 Summer Of Code hook app (look at detached solutions).

Both of my menus are fake, but the memory menu will be tough to replicate.

I am just wondering, what version are YOU using?!? I have to clear my RAM anyways after unhiding programs! Lucky! (I am using .2 on brandonw.net)

[JoostinOnline]

[pugboy]

It works, but then I will get a RAM clear after a while.

[magicdanw]

What do you mean, "after a while?" The app is probably designed to only be installed for a short period of time (during the ram/memory clear attempt.) It's probably best not to keep it installed for extended periods of time, and to not do unnecessary operations on the calculator while it's running.

[pugboy]

Even on his site, it says you should clear the RAM because the VAT gets messed up. I tried installing, fake reseting, then unlocking, and when I look at the menus where you can view programs, and exit those, I will get a RAM cleared.

[brandonw]

Since people are using that thing, I really ought to revisit it and get it stable and fix stuff.

I just jumped in to say that you can determine if a calculator is an Nspire (for your About screen thing, if I skimmed over it correctly) by checking the boot code for bytes 0EDh,0EFh in succession. The Nspire boot code is guaranteed to have this, but not the real boot code. Scanning 16KB for those bytes does leave a tiny little delay, so that's the downside, but it's something you can do once and then set a flag for later.