I am thinking about doing a hardware hack on the TI-83 (standard) which would involve burning a new rom. I am mainly wondering if the MX-ROM in the TI-83 is a one time writeable, or Flash so I could just rewrite it. In either case, I need to find a pinout for the chip which has been nearly impossible. If not the ROM chip, a processor pinout might work, as I may be able to trace the connections to the ROM, but I have also been unsucessful in finding that.
Here are some numbers off the chips in case anybody knows where to find info about them:
Processor:
TOSBIBA T6C79
Rom:
MX S001438
I know this is a difficult area to find info, but if anyone knows anything I would greatly appreciate it. Thanks
2
I've found (finally!) the datasheet for the ROM- there's no real part number printed on it but it's actually an MX23C2000.
I've uploaded the datasheet at
http://axdf.net/~abrasive/ti83mx.pdf
You've probably lost interest in the project but it might help someone else
I've uploaded the datasheet at
http://axdf.net/~abrasive/ti83mx.pdf
You've probably lost interest in the project but it might help someone else
3
Well, unused but available information is always better than necessary yet absent documentation 
