Disassembly of HP41C ROMs


I am looking for information on how to disassemble the plug in ROM modules of HP41C. Thanks,


If you mean physically opening them, you'll generally need to use a sharp knife to cut them open, as they are ultrasonically welded. They are not intended to be opened. As they say, "no user serviceable parts inside." Of course, some of us aren't normal users.


There is some information about opening the module in PPC Journal V6N7 (October 1979)

I will email you a picture of the extract.

Good luck


Thanks Roger and Eric.

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