|Re: HP97 crashing with trig and logs|
Message #10 Posted by Mark Edmonds on 2 Aug 2008, 6:10 a.m.,
in response to message #9 by Mark Edmonds
OK, finally had time to get on with this and test the keyboard fix results.
And they are .... no change. Damn.
Basically, any function related to logs, trig and pi causes the machine to hang. The rest of it works fine so I've got a nice "HP97-lite".
Not happy of course.
My hardware debugging skills are almost zero so I don't know where to look next.
My theory is that there is a corrupt ROM or maybe RAM. The basis for this being that the code for the dead functions exists in a section of the ROM which is bad or they require a section of RAM that is bad.
Unfortunately, I can't run the diagnostic program because I can't type it in without the calc locking up.
So... somewhat up a creek without a paddle. I can use the calc as an addition machine with stats but I am not happy to leave it at that.
I don't know if anyone has any brainwaves for things I can try both external and internal but I'll be really grateful for any suggestions. I want to get this working and I'm really not prepared to leave it neutered as it is now.
Thank you! :)