Commodore 4109
Brief History
One of the first calculator with the well-known famous Commodore-design was the rechargeable model 4109 with 10-digit capacity, which provided some semi-scientific functions in addition to standard features. Commodore, who hasn’t yet been committed to MOS Technology, utilized a circuit made by Western Digital Corporation, and a LED display from National Semiconductor Corporation. This machine was proudly holds the label on the back: Made in U.S.A. Later, Commodore — among with other manufacturers — moved the production to countries have lower labor costs, e.g. Japan and Hong Kong, however, the factories in US and UK had been equipped with state-of-the-art automatic production lines.
| Manufacturer: | Commodore Business Machines (USA) |
| Mfg. date: | 1974-75 |
| Size: | 8,1×15,2×3,4 cm |
| Weight (ready for operate): | n.a. |
| Type: | extended four-function |
| Capacity: | 10 digits (input/display) 10 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Western Digital LC1692B |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Sqrsquare root x2square 1/xreciprocal |
| Display: | 12 digit LED (NSC NSA5120) |
| Power: | 3×AA NiCd rechargeable battery (built-in) |
Commodore 4109
Inside of the 4109
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