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Calculators: Handheld: Casio Memory-10 (aka H-1010)
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Size (approx): |
75mm
x 135mm x 22mm (w x h x d) |
| Power: | 3.0V DC using 2 x AA size batteries. It accepts an adapter (AD-2S 3V 0.3W) through a socket on the top side to the far left. The on/off switch is on the left side by the Casio logo. | ||
| Case: | The case is three-piece smooth plastic with a white base and black and white front. A white blue and black printed label sits in its own recess on the top panel. The neutral display filter is flat and slightly recessed and gives a clean bright image. The typical Casio keys are squishy but work well. They keys are surrounded by a brushed aluminium panel which sits in its own recess with black plastic escutcheons for each key. There is a front switch for floating / 2 decimal rounded display. | ||
| Display: | 10 digit blue VFD with no eleventh digit | ||
| Features: | Standard four functions with percentages, square root and three function memory. Floating point and two decimal point modes. | ||
| Age: | 1976 | ||
| Manufacturer: | Casio Computer Company Ltd, made in Japan. Serial number 3448524 on sticker inside the battery compartment, with another on the compartment cover 2174715. | ||
| Comments: | Solid slab shaped calculator that is slightly different from the normal Casio design but maintains a lot of the familiar features. The display is rather small to accommodate the ten digits. The logic is quite poor with no recovery, negative square roots and limited negative numbers. The original case is soft black plastic with an open top and subtle curves on the front and rear edges. It has Casio embossed on the front and Made in Japan on the back. Very similar in design to the Casio Memory-8A |
| Components: | 1 x cpu: Hitachi HD3692A
5L 11 (November 1975), 40 pin DIL 0.6" width black plastic 1 x 10 digit VFD; single tube round face LD8139 2 x transistors 5 x diodes 17 x capacitors 5 x resistors 2 x resistor arrays 1 x transformer |
| Boards: | The keyboard assembly (IOW-E4B) is attached to the front with 6 screws. It links to the main cpu board (IOW-1B) via 13 strong wires. There is a small transformer board that piggy-backs on the main cpu board. |
| Construction: | Remove the screw from within the battery compartment and the back lifts off easily - hinge from the bottom as there are two lugs there. |
| Logic comments: | The (C) key is used to cancel an entry whilst the (AC) key clears the whole calculator |
| Input overflow is suppressed inputting an eleventh digit is ignored | |
| Negative numbers are shown with a "-” in the immediate left digit but as there is no eleventh digit you are limited to seven digit negative numbers | |
| There is an selectable constant on all multiply and divide only by double-hitting the operator; i.e. (3)(X)(X)(=) gives "9", (=) gives "27" though squares can be performed by keying in (3)(X)(=) to give "9". | |
| Negative square roots are allowed and result in a negative number | |
| Divide by zero shows “E” in the far right (first) digit and is not recoverable | |
| Overflow shows just “E” in the far right (first) digit and is not recoverable | |
| Memory storage is not indicated – you have to remember it and (AC) clears the memory too. | |
| You can switch between full floating (F) and two digit round down notation | |
| No other bugs found |
