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Casio 101-S Desktop Calculator
Casio 101-S
The Casio 101-S is one of a lengthy series of calculators in
Casio's 101 line that began all the way back in the early days of
Casio calculators with the original discrete transistor
Casio 101. As with all of
the calculators in Casio's 101-series, the 101-S has a capacity of
ten digits, using individual vacuum-fluorescent tubes
for display. The 101-S was introduced in mid-1972, and sold for
$279 at introduction.
The 101-S provides the four basic math functions along with a single
accumulator-style memory register with individual keys to add [M+]
and subtract [M-] the content of the display
to/from the memory. The [T] key recalls the content of the memory register
to the display and clears the memory register. The [C] key acts
as a clear entry key, providing for erasing any incorrectly entered number
provided it is pressed before any function key.
Pressing both the [T] key and the [C] key simultaneously will clear the
entire machine. The calculator operates with fixed decimal point which is
slide-switch selectable at 0, 1, 2, 3, 4 or 6 digits behind the decimal point.
A rounding-mode switch provides 5-up/4-down roundoff or truncation modes.
The brains of the machine are made up of a five-chip LSI chip-set made
by Hitachi. A number of small-scale Hitachi-made chips provide glue logic
and interfacing functions. Along with the ICs, there's a small number of
discrete transistors(clock generator), a few diodes, and a sprinkling of
capacitors and resistors as well as some hybrid inline multi-resistor
packages. The power supply uses a conventional transformer, with linear
Zener-diode/pass-transistor regulation for the logic
power supplies, along with a small switching power supply to generate the
higher grid voltage needed by the Vacuum-Fluorescent display tubes.
Manufacturer: | Casio Computer Co., Ltd. |
Model Number: | 101-S |
Introduced: | Mid-1972 |
Price: | $279 at Introduction, $225 by February, 1973 |
Manufactured In: | Japan |
Display Technology: | Individual Vacuum-Fluorescent Eight-Segment Display Tubes with Right-Hand Decimal Point |
Logic Technology: | Hitachi HD32xx-series five-chip microcoded LSI chip-set |
Numerous Hitachi Small-Scale Glue ICs | |
Digits of Capacity: | 10 |
Decimal Modes: | Fixed. Switch selectable at 0, 1, 2, 3, 4, or 6 digits behind decimal point |
Math Functions: | Four Function |
Memories: | One accumulator-style memory register |
Size: | 7" wide, 8 1/10" deep, 2 3/5" high |
Weight: | 3 pounds |
Power Supply: | 115V AC, 60Hz, 6 Watts |
Performance: | (Mfg. Claimed Maximums) |
Addition/Subtraction: | 40mS (0.04 Second) |
Multiplication/Division: | 300mS (0.3 Second) |
Memory Recall: | 50mS (0.05 Second) |
Notes: | Unusual half-sized zeroes |