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Old calculator with reverb ram
12-03-2017, 12:44 AM
Post: #10
RE: Old calculator with reverb ram
Very cool! I am always amazed throughout history at what engineers could do with the technology that was available at the time.
More information on the Friden EC-130 (1964) and 132 (1965) calculators:
http://www.oldcalculatormuseum.com/friden130.html
http://www.oldcalculatormuseum.com/friden132.html

1965 was a very interesting year for electronic calculators that saw several breakthroughs in technology.

There was the Toshiba BC-1441 Electronic calculator that used discrete capacitors to form an early type of the Dynamic memory that is used for RAM in all modern computers, phones, tablets, etc. Just like today's SDRAM, each capacitor had to be periodically "refreshed" to keep its charge (or lack of charge) for storage of its one bit.

More importantly, 1965 also saw the introduction of the Victor 3900, the first calculator (or any type of consumer device) to use Large Scale Integration Metal Oxide Semiconductor (LSI MOS) integrated circuits for all of the logic of the machine. This was a true milestone in technology that helped pushed forward the upcoming microprocessor revolution.
http://www.oldcalculatormuseum.com/d-victor3900.html

Calculator History Timeline:
http://www.oldcalculatormuseum.com/timeline.html
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Messages In This Thread
Old calculator with reverb ram - Tugdual - 12-01-2017, 06:57 AM
RE: Old calculator with reverb ram - jebem - 12-01-2017, 04:33 PM
RE: Old calculator with reverb ram - jebem - 12-03-2017, 12:34 PM
RE: Old calculator with reverb ram - BobVA - 12-02-2017, 06:36 PM
RE: Old calculator with reverb ram - Steve Simpkin - 12-03-2017 12:44 AM



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