It all started with this little programmable SR56 calculator. I bought it in 1976, build a small program for it and became a Philips software engineer one year later.
In 2013 I was cleaning my attic and found it. The first idea was to sell it.
I didn’t …………
Looking on the internet what would be a reasonable selling price for the SR56 I ran into the above small mechanical calculator.
What I found on the internet regarding this and other machines was very interesting. So, I bought it ..... and another one and a more complex one …………
How Semiconductors Changed The World
About 1970 the world of calculating machines rapidly changed from mechanical
to electronic. Using a slide rule most of the time and electronic calculators not being allowed at school, I wasn’t aware at all of the changes that took place.
Now I consider it my mission to setup a small collection of well preserved and operational calculators which are representative for the changes that took place in that period.
Added a Brother AX-430 typewriter
Added Texas InstrumentsSR56 & PC100A
Added Marchant 8ADX
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Texas InstrumentsSR56 & PC100A
This bulky heavy Canon 130s is a very early electronic calculator. When I bought it, it was functional. However, soon afterwards it didn’t function anymore. It just shows random digits.
There is some, but not much information available on the internet. I don’t know wether a repair is possible, but I’ll give it a try.