|Re: The *REAL* Self Tests For the 15C LE|
Message #11 Posted by Jeff O. on 12 Sept 2011, 8:51 a.m.,
in response to message #10 by Mike Morrow
The latest 12C+ firmware, or at least what I believe to be the latest firmware, dated 2009-11-19, does indeed retain the original self tests. Behavior is as follows:
'ON plus /' : Works fine if you start pressing keys quickly enough. If you press the keys out of order or wait too long, Error 9 is displayed.
'ON plus x' : Display flashes "running" once, then lights all segments except low-battery.
'ON plus +' : Display flashes "running" somewhat erratically. I got various results after pressing "any" key to stop the test, including Error 2, Error 6, and all segments lit, most often the latter.
To test for memory corruption with the latter two tests, I entered the following program:
This simple program was not corrupted by the self tests, I don't know if that proves that other programs would not be corrupted.
By the way, 'ON plus -' clears memory and resets the calculator as it has always done.