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AKA (Label): MODEL MARK 1, Product number (P/N): 1,
Keywords/Tags: 1 | MARK 1
Date of intro: ~1974, Origin: Japan (List),
Power: AC,
Display: Type = Display (VFD) (List), Brand = ISEDEN: DP82A1,
Number of keys: 18, #Key-Blue: 2, #Key-Red: 2, #Key-White: 14,
Keyboard Array (Rows x Columns): 04x05, Keyboard Layout: [7] [8] [9] [CE] [C] - [4] [5] [6] [x] [(Division)] - [1] [2] [3] [+] [-] - [0] [.] [=],
Decimal switch: [5-4-3-2-F], Miscellaneous switch: [K-(ArrowUp)],
Classification: / Desktop with Display,
Featuring: Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: (Unknown manufacturer): E46473,
Resemblance with: (Resemblance 506),
Known Serial-numbers: A26651 (A 26651) | A30024 (A 30024) | A35480 (A 35480) (List of all S/Ns from COMPUTEX)
Collector value: 7.5/10,
Courtesy of: DEWITT Jonathan,

Item

Display
(Courtesy of: DEWITT Jonathan)

Internals
(Courtesy of: DEWITT Jonathan)

Internals (keyboard)
(Courtesy of: DEWITT Jonathan)

Internals (power supply) / Switch (power)
(Courtesy of: DEWITT Jonathan)

Label, name plate / Examples of use / Bottom
S/N: A35480 (A 35480)
(Courtesy of: DEWITT Jonathan)

Created: 14-may-2011, Manual-update: 28-aug-2021, Batch-update: 25-jan-2022             

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