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Found some documentation listing the two middle switches as the rounding switch (up fraction down) and the decimal switch (auto? 0 to 6 then hex?). No idea on the other two.
http://www.calcuseum.com/SCRAPBOOK/BONUS/32853/1.htm
Decimal switch: [A-0-2-3-4-6-F], Round switch: [(ArrowUp)-5/4-(ArrowDown)], Miscellaneous switch: [(Blank)-K .-(Sigma)],
The first one lets you turn K on or off
K.
Damn, it worked.
The right-most switch lets you turn on sigma mode.
I would assume that’s summation mode, so everything you enter is treated as a running total. This looks like a business calculator.
