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Calculators: Handheld: Homeland 8101
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Size (approx): | 80mm
(max) x 123mm x 21mm (max) (w,h,d) Weight 114g excluding batteries |
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Power: |
3V DC, 2 x AA size battery, 0.3W. Also accepts adapter/ (undefined) through bottom side socket on the right. | ||
| Case: | Stylish calculator case in two-piece black (or very dark brown) gloss and matt plastic. It is dominated by a wrap around brushed aluminium panel on the front. This is printed with black text for the brand, model name and on/off switch label. A slightly proud but flat green display filter also wraps over the left hand edge. They keys are long travel, squishy and very reminiscent of Casio keys. | ||
| Display: | 8 digit green VFD with a ninth digit used for negative, error and memory indication | ||
| Features: | Standard four function with percentages, sign change and three function memory | ||
| Age: | 1976 | ||
| Manufacturer: | Has the text "Toshiba Business Machine Co. Ltd." and "Teal", made in Japan . Serial No. 845390 | ||
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Comments:
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High quality calculator with a stylish design. The original cover is soft black plastic with an open top and half-moon cut-outs. The logic is good as there is excellent recovery (using the (C) rather than (CE) key though) and only let down by the negative zero bug. Homeland was the brand used by Toshiba in the UK (and probably elsewhere). It appears that they may have made these calculators for Prinztronic (Dixons) as well. |
| Components: | 1 x cpu: Mitsubishi M58618 81P
5566, 28 pin DIL, 0.6" width 1 x 9 digit VFD unit: round faced single tube: Toshiba E6532A 5J9H2B? 2 x transistors 6 x diodes 6 x capacitors 0 x resistor arrays 21 x resistors 1 x transformer unit: 510 |
| Boards: | The main cpu board sits on the base of the calculator held in place by four plastic posts and adapter socket whilst the keyboard assembly is fixed to the front. The boards are joined by a 15-way block of wires. |
| Construction: | Very difficult to open as it is sealed using internal lugs only and the sides of the case are very stiff. There is what looks like a coin slot at the top - but this appears to be useless. You have to try and squeeze in the rear of the case and pop the easiest lug. Damage is highly like so if in doubt - don't do it. The front will eventually hinge up but not off. |
| Logic comments: | The (CE) button is used to clear entry of a number, whilst (C) clears the calculator |
| Overflow on number input is suppressed, keying in a ninth digit is ignored | |
| There is automatic constant on multiplication and division only | |
| Negative numbers are shown with a “-“ sign in the far left (ninth) digit thereby allowing full eight digit negative numbers | |
| The sign change key (+/-) can be used in mid number entry | |
| Overflow shows the result and “C” (or “E” if negative) in the far left (ninth) digit and is recoverable using (C) | |
| Divide by zero shows zero result and “C” in the far left (ninth) digit and is recoverable using (C) | |
| The (M=) keys is actually a memory-plus function, adding the contents of the display to the current memory | |
| Memory store is indicated by a decimal point in the far left (ninth) digit | |
| It suffers the negative zero bug: key in (1)(-)(2)(=) to give “-1” then (+)(1)(=) will give “-0” |
