Message #1 Posted by Mike T. on 15 Aug 2007, 1:54 p.m.
I don't remember noticing this mentioned here before but I recently noticed some 'odd' behaviour on my HP25 (s/n 1603********).
An arithmetic operation that results in an overflow results in, as expected
' 9.9999999 99'
However when a register operation results in an arithmetic overflow then, rather than the expected error message,the calculator displays
' 0F '
As my HP21 behaves in the same way I presume that this is intended, but as I don't have the manual I can't double check this. (I find it interesting is that unlike the normal error conditions the register value is updated and the error state is cleared if CHS is pressed).
The questions I have are
-Does the HP29C' behave in the same way..?
-Are there any other 'odd' error codes..?
-Does the HP29C return an error number as well as the error message..?
-How is the i register used to indirectly address store and (I assume) program locations..?