Découverte écran mauve debug TI-83 Premium CE 5.0.0.0062

My calculator programs · by **Adriweb** » 09 Jun 2017, 17:12

Yes, I meant, it's a separate thread.
But I didn't pay enough attention to the follow up... "too bad" it got deleted, but it's probably not a huge loss, if it didn't even behave properly to Asm programs, it's probably quite an unusable version...

→ **MyCalcs** profile · by **parrotgeek1** » 09 Jun 2017, 17:19

Adriweb wrote:Yes, I meant, it's a separate thread.
But I didn't pay enough attention to the follow up... "too bad" it got deleted, but it's probably not a huge loss, if it didn't even behave properly to Asm programs, it's probably quite an unusable version...

I think they just disabled assembly programs, but once they realized the test LED security was good enough, they enabled them again.

More interesting would be to try to figure out where it is crashing.

I wonder if the development boot code even checks the signature of the OS?

→ **MyCalcs** profile · by **critor** » 09 Jun 2017, 19:39

I've attached something for you.
A backup of the DVT-EVT2 prototype apps :

TI-83 Premium CE 5.0.0.0187 EVT Apps & Archived Vars.ZIP

It may help us understanding what's so different with the ASIC.

Yours to discover...

→ **MyCalcs** profile · by **parrotgeek1** » 09 Jun 2017, 19:59

critor wrote:I've attached something for you.
A backup of the DVT-EVT2 prototype apps :
TI-83 Premium CE 5.0.0.0187 EVT Apps & Archived Vars.ZIP

It may help us understanding what's so different with the ASIC.

Yours to discover...

how did you extract these?

→ **MyCalcs** profile · by **critor** » 09 Jun 2017, 20:04

The owner did, with TI-Connect CE, before the bricking of course.

→ **MyCalcs** profile · by **parrotgeek1** » 09 Jun 2017, 20:08

critor wrote:The owner did, with TI-Connect CE, before the bricking of course.

Interesting

POLYNOMIAL ROOT FINDER andSIMULTANEOUS EQUATION SOLVER
Pre V5.0 build 07

→ **MyCalcs** profile · by **critor** » 09 Jun 2017, 20:11

And the Inequalz app is anormally small...

→ **MyCalcs** profile · by **parrotgeek1** » 09 Jun 2017, 20:16

critor wrote:And the Inequalz app is anormally small...

yes, it is blank, the code just quits the app

this is a REALLY early firmware

→ **MyCalcs** profile · by **critor** » 09 Jun 2017, 20:29

I can't install the EVT2 apps on a real calculator.

K-ELG2-DVT prototype with Boot Code 5.0.0.0082.

I can install any app with a version 5.0.0.0082 or newer.
But apps with a version 5.0.0.0062 or older, including the ones attached above, just get rejected at the validation step.

Either the RSA signing keys are different...
Either there are some additional checks for the targeted hardware/ASIC.

→ **MyCalcs** profile · by **parrotgeek1** » 09 Jun 2017, 20:36

critor wrote:I can't install the EVT2 apps on a real calculator.
K-ELG2-DVT prototype with Boot Code 5.0.0.0082.

I can install any app with a version 5.0.0.0082 or newer.
But apps with a version 5.0.0.0062 or older, including the ones attached above, just get rejected at the validation step.

Either the RSA signing keys are different...
Either there are some additional checks for the targeted hardware/ASIC.

1) can k-elg2-dvt install production OSes?

2) do you have any program like imgmanip but for 8eu/8ek files? Like that can dump the keys, extract code, print info, etc?