Casio MEMORY-8F: Difference between revisions
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[[Category:Pocket calculator]] | [[Category:Pocket calculator]] | ||
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{{Infobox calculator|name=Casio MEMORY-8F|manufacturer=Casio Computer Co.|processor=NEC μPD977C|entry=Algebraic|ports=5.5x2.5mm barrel connector|prog_lang=N/A|dimensions=140(l) x 77(w) x 24(h) mm}} | {{Infobox calculator|name=Casio MEMORY-8F|manufacturer=Casio Computer Co.|processor=NEC μPD977C|entry=Algebraic|ports=5.5x2.5mm barrel connector|prog_lang=N/A|dimensions=140(l) x 77(w) x 24(h) mm|image=Image:Casio MEMORY-8F.jpg|weight=123g|display_type=VFD|precision=7+0 (up to 8+0 when entering numbers)}} | ||
The Casio MEMORY-8F is a 6 function basic calculator produced by Casio in Japan. The main features of this calculator are its memory functionality and small size. A version of this calculator with white number keys and black text is also in existence. | The '''Casio MEMORY-8F''' is a 6 function basic calculator produced by [[Casio]] in Japan. The main features of this calculator are its memory functionality and small size. A version of this calculator with white number keys and black text is also in existence. | ||
== Internal design == | ==Internal design == | ||
The calculator is based around the NEC μPD977C, a calculator ASIC, which integrates arithmetic, display control, and keypad input reading all into a single chip. The display used is a Toshiba E6535A, a eight digit 8 segment vacuum fluorescent display module. The power supply for the vacuum fluorescent display is housed on a separate daughter board. | The calculator is based around the NEC μPD977C, a calculator ASIC, which integrates arithmetic, display control, and keypad input reading all into a single chip. The display used is a Toshiba E6535A, a eight digit 8 segment vacuum fluorescent display module. The power supply for the vacuum fluorescent display is housed on a separate daughter board. | ||
The keypad on this calculator uses an interesting mechanism, where each key has its own conical spring, which makes contact directly with the PCB when the keys are pressed. Thus, no conductive pads are required, which leads to greater long term reliability in the key mechanism and consistent key feel as the calculator ages. | The keypad on this calculator uses an interesting mechanism, where each key has its own conical spring, which makes contact directly with the PCB when the keys are pressed. Thus, no conductive pads are required, which leads to greater long term reliability in the key mechanism and consistent key feel as the calculator ages. | ||
== Gallery == | ==Gallery== | ||
<gallery> | |||
File:Casio MEMORY-8F board top.jpg|Top of the main board | |||
File:Casio MEMORY-8F keypad bottom.jpg|Bottom of the keypad board | |||
File:Casio MEMORY-8F sleeve.jpg|Faux leather sleeve | |||
File:Casio MEMORY-8F board bottom.jpg|Bottom of the board | |||
File:Casio MEMORY-8F rear.jpg|Rear case | |||
</gallery> | |||
== See also == | ==See also== | ||
* [[Casio J-3]] | *[[Casio J-3]] | ||
* [[Casio 122-F]] | *[[Casio 122-F]] | ||
Revision as of 05:24, 30 May 2022
 | |
| Manufacturer | Casio Computer Co. |
|---|---|
| Calculator | |
| Entry mode | Algebraic |
| Precision | 7+0 (up to 8+0 when entering numbers) |
| Display type | VFD |
| CPU | |
| Processor | NEC μPD977C |
| Programming | |
| Programming language(s) | N/A |
| Interfaces | |
| Ports | 5.5x2.5mm barrel connector |
| Other | |
| Weight | 123g |
| Dimensions | 140(l) x 77(w) x 24(h) mm |
The Casio MEMORY-8F is a 6 function basic calculator produced by Casio in Japan. The main features of this calculator are its memory functionality and small size. A version of this calculator with white number keys and black text is also in existence.
Internal design
The calculator is based around the NEC μPD977C, a calculator ASIC, which integrates arithmetic, display control, and keypad input reading all into a single chip. The display used is a Toshiba E6535A, a eight digit 8 segment vacuum fluorescent display module. The power supply for the vacuum fluorescent display is housed on a separate daughter board.
The keypad on this calculator uses an interesting mechanism, where each key has its own conical spring, which makes contact directly with the PCB when the keys are pressed. Thus, no conductive pads are required, which leads to greater long term reliability in the key mechanism and consistent key feel as the calculator ages.
Gallery
Top of the main board
Bottom of the keypad board
Faux leather sleeve
Bottom of the board
Rear case
