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CASIO: H1B
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Product number (P/N): H1B,
Keywords/Tags: H1B
Date of intro: ~1980, Origin: Japan (List), Dimensions: 136x77x20mm, Weight: 142g,
Power: 3V: (AA x2) + Adaptor, Adaptor: CASIO_adaptors: AD2S,
Display: Type = Display (VFD) (List), Digits = 8,
Number of keys: 23, #Key-Black: 16, #Key-Grey: 6, #Key-Orange: 1,
Classification: / Pocket,
Featuring: Procent, Square root, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Main Components: CASIO: G1G1B,
Serie-members: CASIO: H1; CASIO: H1B,
Collector value: 7/10,
Info: DUDEK Emil:
You just know this is a CASIO!.
Only let down by the lack of a ninth digit - hence you can only have seven digit negative numbers and you can have negative roots.
Boards:
Main board is connected by 16 copper wires to the (and sits on top of the) keyboard board. The latter is secured to the front by 5 screws.
Construction: Remove the single screw from the back and gently prize from the bottom.
Logic comments:
[C] is used to clear last entry of a number and [AC] to clear the whole calculator.
Overflow on number input is suppressed, typing in a nine digit number ignores the ninth digit.
An overflow error is flagged with an ‘E’ in the first (right most) digit, negative or positive. Number is not recoverable.
Divide by zero results in a ‘E’ which is also not recoverable.
There is constant on all functions by double-hitting the operator.
Square roots of negative numbers are allowed.
[AC]cancel the memory as well, there is no indication of memory store - you have to remember it.
Negative numbers are flagged by a ‘-‘-sign in the immediate left digit, limiting you to seven digit negative numbers.

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Created: 15-may-2019, Manual-update: 15-may-2019, Batch-update: 25-feb-2024             

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