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TI-83+/84+ OS glitches compilation thread (all OSes)

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DJ Omnimaga:
for BASIC bugs, I forgot a bug about the "Then" instruction I think but the issue is that I don't remember exactly how it was triggered, but it involved getting an error when not supposed to

EDIT: added it to bug list.

EDIT 2: added ERR:BAD ADDRESS bug and the modified byte when grouping bug

mapar007:
I once had this BAD ADDRESS bug, never figured out what it was, though, since it was before I learned ASM xD

EDIT: The bad address thing was on my 84+ basic, so it does occur on such calcs. ( I already had OS 2.43 back then I think)



--- Quote ---Workaround: To prevent ERR:VERSION, always group your stuff twice then ungroup each groups to make sure everything is correct or update to latest OS. For the rest, you just need luck, altough this is much less frequent on newer OSes, if it happens at all.

--- End quote ---

Or get GroupTool (Look at Brandon Wilson's author profile at ticalc.org) I've successfully ungrouped such files with it.

Workaround No2: Edit the Version byte in the VAT with calcsys. (if you don't know where this version byte is, open up your calcsys manual and asmin28, day 21)

Builderboy:

--- Quote from: mapar007 on October 19, 2009, 11:00:45 am ---Or get GroupTool (Look at Brandon Wilson's author profile at ticalc.org) I've successfully ungrouped such files with it.

--- End quote ---

I've come to think that this is the reason for my massive Serenity corruption, as I used it frequently before, and since I stopped using it, have not had the problem again.  I ruled out TiConnect, because files that I had not transferred to my computer were later found to be corrupted too D:  Anyway, I've stopped using GroupTool, even though it is very very usefull.

DJ Omnimaga:
The For( glitch in action:



Notice the speed difference when the closing parhentesis is removed!

I really need to scan through Metroid II code one day... maybe THIS is what causes the game to suddently slow down after taking an elevator or to just run slow altogether. I mean, how can it run so slow when the walking loop is so small?

drummist:
OS 1.14 (I think) through 1.16
String STO glitch with matrix
Trigger: Store the symbol for matrix H to a string, as in: "[H]->Str1
Effect: Do a variable recall on the string (2nd, RCL), and you will get "lcm(" which also happens to be the 8th item in the MATH->NUM menu (coincidence, eh?).
Workaround: Waste a byte or two, and store the actual characters for '[' 'H' and ']'.

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