On the TI-84 Plus, getting the calculator ID using Doors CS libraries will return 0434000000 in jsTIfied. I was wondering if 0434000000 is used for invalid ids and if the ID is invalid, that
Code: det(3,4
will always return 0434000000, or if this is just in jsTIfied.
I think, if you obtained the ROM legally from your calculator, the ID should be the same as that of the calculator you took the ROM from.
lirtosiast wrote:
I think, if you obtained the ROM legally from your calculator, the ID should be the same as that of the calculator you took the ROM from.
Every emulator I use will have invalid IDs, so I don't believe that it works that way. I think it is pulled from the hardware.
Calculator ID is stored in the certificate, which no ROM dumper (to my knowledge) dumps. I believe emulators typically pretend it doesn't exist (blank sectors), which affects how apps must be loaded since without a certificate signature verification will not succeed either.
I know that 04XXXXXXXX means it is a TI-83 Plus (which is weird because it should be 0A, not 04, because I was emulating a TI-84 Plus) and that XX3XXXXXXX means version 3, and that XXX4000000 is the serial number. But the question is: will it always be XXX4000000 if it's invalid?
Define "invalid"; all-zero may indeed be a valid serial number. I'd guess that what happens internally is there's a call into an OS routine that would fill a previously-zeroed buffer with a serial number from the certificate which fails and leaves everything zeroed. It's probably stable enough to depend on.
Tari wrote:
Define "invalid"; all-zero may indeed be a valid serial number. I'd guess that what happens internally is there's a call into an OS routine that would fill a previously-zeroed buffer with a serial number from the certificate which fails and leaves everything zeroed. It's probably stable enough to depend on.
But what about the 4 in front of those six 0s?
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