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Calculators: Handheld: Hanimex BCM901S
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Size (approx): | 84mm x
143mm x 24mm (max) (w,h,d) Weight 142g excluding batteries |
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Power: |
3V DC, 2 x AA size batteries, 100mA. Does accept an adapter (3V DC 100mA, centre negative) through socket on the top side to the far left. | |
| Case: | Lower part of the case is matt black plastic whilst the top consists of a brushed aluminium keyboard surround and large wrap around plastic display filter. The latter is painted black except over the display and painted company and model name have survived well. A small piece of metal trim is painted green – which hasn’t survived well. Keys are small with short travel and a positive click. | |
| Display: | 8 digit blue VFD, ninth digit for minus sign and error flags | |
| Features: | Standard four functions, percentages and four function memory | |
| Age: | 1976 | |
| Manufacturer: | Hanimex. Serial No. E-58 003518, made in Hong Kong. | |
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Comments:
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Clean and simple wedge-shaped design feels quite heavy. Original cover is black soft plastic with open top and Hanimex embossed on the front. It is also wedged-shaped. |
| Components: | 1 x cpu: CF-595 7614 (week 14 of 1976)
28 pin DIL 1 x nine digit flat faced VFD display 2 x transistors 7 x diodes 5 x capacitors 2 x resistor arrays 5 x resistors 1 x coil transformer |
| Boards: | The keyboard board (Ref M056) is fixed to the front with 6 screws and attached to the CPU board by a 17-way ribbon cable. CPU board has a lot of extra holes, it looks like a generic or heavily revised board. |
| Construction: | Remove the two screws at the back and ease off the keyboard section. |
| Logic comments: | (CE/C) is used once to cancel the last number entered and a second time to clear the whole calculator. |
| There is automatic constant on all four functions | |
| Input overflow is suppressed, inputting a ninth digit is ignored | |
| Negative sign is shown in the immediate left hand digit travelling into the ninth to allow full eight digit negative numbers | |
| Divide by zero shows zero and "C" in the far left (ninth) digit and is recoverable using (CE/C) | |
| Overflow is shown by "C" (or "E" if negative) in the far left (ninth) digit and is recoverable using (CE/C) | |
| You can trip up the trailing zero suppression, try this; key in "0.0000000" then (-)(2)(=) and it gives you the answer "-2.0000000". This stays until you multiply or divide. | |
| There is no indication of memory – you have to remember it |
