I tried resetting HP48S based on opinions from Mr.Rysgaard via comment. On the contrary, I hadn't known the reset switch exists from the very beginning.
So I had to find the reset switch out. Also I used web search-engine, finally I got information about the reset switch. The reset switch was located at inside of a top-right rubber feet. I felt it was very special location.
Be that as it may. I pushed it few seconds several times. But nothing improved...
I seem that an on-board battery for backing up memory had been dead or something like that, because I had not turned it on over 5 years.
...With such thoughts running through my mind, I operated a Mac OS X calculator without any purpose. Then I found out interesting function of the Mac OS X calculator.
I clicked the key-pad in the following order.
Also I was thought that this key order will be parsed as the following formula. (This is normal calculator) But the Mac OS X calculator displayed 31. This means that the Mac OS X calculator performs mathematical calculations.
I felt it was interesting, so I tested the same method with the Windows calculator. Then it became an interesting result.
I report as follows.

• Windows calculator (normal mode)
  (5 * 2 + 7) * 3 = 51
• Windows calculator (scientific mode)
  5 * 2 + 7 * 3 = 31
  
  
• Mac OS X calculator (normal mode)
  5 * 2 + 7 * 3 = 31
• Mac OS X calculator (scientific mode)
  5 * 2 + 7 * 3 = 31
• Mac OS X calculator (programmer mode)
  5 * 2 + 7 * 3 = 31

The calculation result is depending on the mode with the Windows calculator! while on the other hand, my Mac OS X calculator is so smart!
During testing like this, I found out more big feature is implemented on Mac OS X calculator. The Mac OS X calculator had been supporting RPN! (PRN menu had been existing!)
I didn't realize that... What should I do?
(to be continued)

tag : calculator

I used to use a calculator for my job. But now, almost calculations are computed by Excel or special software, so I didn't use a calculator for a long time. My job is FA (Factory automation) and LA(Laboratory automation), so I used to use so-called scientific calculator.
Today I was cleaning out my desk in my office, I found the calculator shown in an upper left icon of this topic which I was using before. (click an icon to see a larger image.)
This is the calculator which is HP48S of Hewlett-Packard Co. I remember the price was over 30,000 yen. It was expensive for me when I bought it. Despite this, my colleagues said "the useless calculator", because this calculator does not have a "=" key. It has a "Enter" key instead of a "=" key.
The reason is that my calculator is based on RPN input method. However I love RPN input method.

For person who doesn't know the RPN...
Anyway above-mentioned explanation tells you how I strongly love to RPN.

I decided reuse the RPN calculator for the first time in many years. Of course, my calculator batteries are dead, so I changed new batteries. Then I powered-on my PRN calculator!
But... nothing happened... Is my calculator dead? Any electric company is not manufacturing the RPN calculator today!
I searched out the customer service of the Hewlett-Packard Japan immediately, but my calculator was already out of support in Japan. And Hewlett-Packard Japan announced on this web-site that the customer support relegated to another oversea company (Broadwin). So I have to contact the Broadwin for repairing my RPN calculator. What should I do?
(to be continued)

tag : calculator

Yesterday, I visited cherry-blossom viewing with my wife according to annual custom. Cherry trees fully blossomed on this weekend, so today is best day for viewing. It was warm in this week, but it was a little cold and gloomy yesterday. Anyway we enjoyed beautiful cherry-blossoms.
This year we enjoyed not only cherry-blossoms but also the special Japan style cafe that is named RAFU. This cafe is not only a cafe but also a gallery, and it's parallel establishment with Japanese green tee shop. So we enjoyed a green powdered tea that called Matcha. Also it's really Japanese taste.
As a matter of course I made a photo album. Please enjoy spring in Japan.

For something completely different,
I used the NeoOffice to make a budget schedule sheet for my wife after a long interval today. The version of the NeoOffice I used was v1.1. Before starting operation, I checked newest version of the NeoOffice with a sudden thought. Then, I found the NeoOffice v2.1 has been released ! I went straight to downloading it. The user interface of the new NeoOffice is like a real Cocoa application! and it supports Office 2007 Word documents and Excel macros!
Great job!!!

tag : cherry-blossom viewing