|Re: HP 25 question (again...)|
Message #5 Posted by Vieira, Luiz C. (Brazil) on 21 May 2003, 12:40 a.m.,
in response to message #4 by Ellis Easley
thanks for your help. I have mine in hnads right now and it's convinientely without the two small screws.
On the top of the smallest IC, 18-pins, I read
The other one, 20-pins, allows the reading of a faded "20" and nothing else. This "20" comes from 1820, I guess.
May I consider this 1818-0163 the ROM chip, with almost all HP25 internal resources? I want to xchange the 25 ROM with the 25C's to verify if the 25C's can be repaired. AFAIK, they are interchangeable, right? If so, I prefer having an HP25C in hands and save the HP25 as for spare parts. It also has a damaged LED display.
Thanks again, Ellis.
Luiz C. Vieira - Brazil