[A83] Re: 83p os


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[A83] Re: 83p os



I think you fail to realize how few people sit up at night dreaming 
of overwriting an OS on a severly limited z80 system with a 64x96 
screen and an impossible keyboard.

;)

> robvanwijk@gmx.net wrote:
> 
>>The trick in loading your own OS is this: make sure that in your 
OS
>>file, these bytes already have the right value. Then, when the 
OS
>>loader is verifying it, pop the batteries. That way, the next time 
you
>>start it, it sees
>>these bytes have the correct values and will assume it's valid.
>>  
>>
> Haha! So that is the secret! that is so wonderfully simple!
> I can't belive it took so long before anyone thought of that. 
Maybe it 
> works on the TI89 too.
> Because it really took a long time before anyone figured out how 
to 
> change the rom on the Ti83, compared to how long it took 
before someone
>  cracked the ti89 protection.
> Or at least before anyone told in public that they had done it.
> 
> --Olle





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