Today, we will be having a close look at the software Serial Port Monitor to connect to embedded UART serial ports. While there is other software available to display the data received via serial port such as PuTTY or Termite, none of these was able to provide me with the detail that Serial Port M...

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I have been working on the RPN-Calculator some more and decided that it needs a faceplate to look better. So I went ahead and designed one based on the CAD drawings I made earlier. I made the sides thicker where the keypad is to make it overlap the gap between the keypad and the case'es plastic. The...

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I just started working on an RPN-calculator. Even though my HP 100LX has an awesome built-in RPN calculator, I really always wanted to build a calculator myself. RPN, for those of you who are not aware, is a way superior (for many people) and parentheses-free way of writing mathematical expressions....

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The biggest problem with the HP 100LX and the HP 200LX is getting information on them. Unfortunately, many of the old websites that contained useful and important information went down. Luckily some are still available on Archive.org (such an awesome website!), but they can't be found on Google or D...

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So I reassembled the unit again today and most of my fixes seem to work. One of the screw posts I glued the other day came loose again, but apart from that everything seems to hold together. And to the most important thing, it BOOTS!

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I can't wait to test some applications on it such as Borland...

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