Casio Mini CM-604
Brief History
Launched in 1972, the first truly inexpensive Japanese pocket calculator designed for households, the Casio MINI, has been a great success worldwide. Its development did not stop, and as competition with similar machines emerged, more and more usable models introduced: the CM-604 version, released in late 1973, was almost the same as normal calculators except for its six-digit display. The price of the machine has also been reduced: instead of the 12,800 yen that was valid from the beginning, it cost only 8,900 yen. The following year, some MINI variations were manufactured, but slowly the price of eight-digit machines fell so much that, with a few exceptions, it was not worth making six-digit machines.
| Manufacturer: | CASIO Computer Co., Ltd. (Japan) |
| Mfg. date: | 1973-74 |
| Size: | 16,1×8×3 cm |
| Weight (ready for operate): | n.a. |
| Type: | four-function |
| Capacity: | 6 digits (input) 6 (5) digits (display) 6 (12) digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Hitachi HD32170P |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) |
| Features: | Ffloating-point notation |
| Display: | 6 digit VFD (NEC LD8084) |
| Power: | 4×AA battery or AD-4145 adaptor |
Mini CM-604
Inside of the CM-604 with disassembled keyboard
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