[A89] Re: AMS 2.05 upgrade problem

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[A89] Re: AMS 2.05 upgrade problem


I know that I can rewrite the flash ROM many times, but how would I
reinstall my old OS (1.00) if I installed an upgrade and decided I didn't
like it?  If I upgrade, will a kernal like DoorsOS will let me run
programs larger than 24k?  I ask because the Doors documentation didn't
say this, and because I recently gave Doors to a friend and it promptly
crashed his calc when installed (he may have had a HW2).

As for the antipiracy, I will quote the offical developer guide:

size <= 24 KB — The current version of the
heap manager cannot allocate any
chunk of memory larger than 64 KB.
The lower 24 KB limit is part of the
antipiracy mechanism.

This is the only mention of the antipiracy mechanism.  I still don't see
why they would need antipiracy protection for the RAM, though, nor why it
creates this infernal limit.  It doesn't make sense.  I always thought it
(the file size limit) made the calc more stable or something, but it
should be pretty obvious that I don't know what I'm talking about.

PS: The random timer worked.  Thanks for your help.

Jon K.


On Wed, 16 Jan 2002 10:08:32 -0600 "TJ" <comfortably_numb_@hotmail.com>
writes:
> 
> yeah you can flash it as much as the hardware can allow, id suggest 
> using
> 2.04 instead of 2.05 (for more compatibility). as for the 
> 'anti-piracy
> mechanism', i believe youre talking about the signatures that the 
> flash
> upgrades and flash apps have. it was actually so that people couldnt 
> make an
> os to write over ti-os, about the apps, im not sure if it is for 
> licensing
> reasons or for the protection to the system since you could easily 
> mess it
> up if you don't know what youre doing. it is definately not for 
> anti-piracy
> because they distrubute the rom unencrypted on the net! its the same 
> image
> you flash your calculator with, so you could disassemble, etc with 
> no
> problem.
> 
> >
> > If I upgrade the AMS, can I revert back to my old one if I decide 
> I don't
> > like the new one?  Also, what the devil does the anti-piracy 
> mechanism
> > do?  Is it there to prevent copying of registered apps?  Why does 
> it
> > require that stupid 24k limit?
> >
> > Jon K.?
> > ________________________________________________________________
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> 
> 
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