Omron 860MX
Brief History
Omron closed the financial year 1975 with a very serious loss of 15 million yen, not least as a result of the price explosion of calculators. The following year, the aim was to rationalize production and revise the product structure. Unfortunately, the simpler, cheaper-to-manufacture models did not solve Omron’s problems, so the production of pocket calculators ceased in 1976.
One of the last models was 860X and 860MX (with memory) with an extremely simplified design, which — similarly to the highly successful 86 and 88 series — was available in several color variations: in addition to the usual black and orange colors, there were green and blue versions, too. The most interesting feature of the 860MX is how it calculates powers: the base can be any number, but the exponent can only be an integer. The explanation is simple: the calculation of power is performed by series of multiplications.
| Manufacturer: | Omron Tateisi Electronics Co. (Japan) |
| Mfg. date: | 1976 |
| Size: | 7,4×11,7×2,4 cm |
| Weight (ready for operate): | n.a. |
| Type: | extended four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Sharp LI2013 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent Ffloating-point notation Sqrsquare root yxraising to power |
| Display: | 9 digit VFD (Itron DP95P) |
| Power: | 2×AA battery or adaptor |
860MX
Inside of the 860MX
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