Posts: 4,027
Threads: 172
Joined: Aug 2005
Hi, Tien;
in fact there is a small jumper that acts like this switch you mention. As you know, the 'E'-series Spices do not have continuous memory as the 'C'-series units have. Each model has a different DC converter: the one in the 'C'-series allows the RAM to be fed while the calculator off.
Some time ago (more than two years) Katie Wasserman added an image to one thread showing that the 'comma-or-dot' jumper was placed in the very DC converter PCB. I`m adding an image of mine (scanned) showing the jumper as it's seen in one of the DC-converter PCB's, but I do not remember which one is it: a 'C'-series or an 'E'-series Spice.
I also do not remember if having it closed means dot as radix mark or the opposite; please, forgive me.
I think that adding a small dip-switch (or smthng like it) that could be accessed through a small cut in the back of the calculator would actually do the job of easily switching from one mode to the other.
Thanks to Katie for showing the path...
Cheers.
Luiz (Brazil)