Some logic in the keyboard encoding provides for detection of simultaneousĭepression (rollover) of adjacent keys, to catch some user entry errors.Īs the 1960s ended and headed into the 70s, one branch of popular design headed off into the tacky. With another trick of shortening the long loop by one bit, the bit interleave of the long-loop registers varies in relation to the short-loop register,Īnd it becomes possible to vary one of the operands in add/subtract cycles simply by making a selection in time rather than doing a full multiplex/demultiplex of all the registers. One of the registers cycles on the short loop while the others cycle on the long loop. There are two write transducers on the delay-line, at different positions on the line, making a short loop and a long loop. This model uses a magnetostrictive delay-line for memory, but more exceptionally a novel technique with the delay-line is employed for register management. However, it suffers from a poorly designed user interface which limits it's With it's programmability and 4 memories. This calculator model appears to be very sophisticated for its age, Of a discrete-component calculator from the 1960's. I was not inclined to try to recreate a full case, rather this unit serves as a display of the internals What I received was actually just the card cage and a chopped off keyboard.Ī replacement power supply was constructed and some plexiglass and aluminum used to hold it all together. The unit shown in the photo is my reconstituted unit. Notably the displays are mounted on the circuit boards in the 130S,Īvoiding the large bundle of wires from the boards to displays present in the 130. The printed circuit boards and mechanical design were redone. The 130S is essentially a repackaging of the Canon 130. Jean traced the faults to some bad Ge diodes and was successful in repairing the unit to full function. Information for this unit was supplied by Jean Campioni in Belgium.Īnd after performing some more reverse engineering of portions of the 130S, There are some minor alterations in the keyboard layout as well. The Canola 120 is a variation on the Canon 130, the 120 having 12 digits instead of 13. Masuda was able to use the Canon 161 schematic to assist in servicing the 120, and then sent along the information presented here. Much as Jean Campioni with his Canon 130S, ![]() ![]() Information for this unit was provided by Shigeru Masuda of Japan. It is nonetheless rather lack-lustre in its thoroughness, leading to some odd and confoundingly erratic behaviour. While a considerable amount of logic and complexity is dedicated to achieving this facility, ![]() There is no switch to set the decimal point position, in contrast to most electronic calculators of this era. In which both operands for an operation may be shifted up or down to bring them into alignment. The 161 and 130 are unusual for their period in that they implement a full floating decimal point The first calculator from Canon and one of the first electronic calculators.Ĭonstructed from discrete Germanium transistors and diodes.Ī slightly enhanced version of the Canon 130:ġ6 digits instead of 13, and an additional accumulating memory. Gallery 1 | Gallery 2 | Gallery 3 | Gallery 4Ĭlick on a photo for a larger version in a new window.Ĭlick on a model name for more details in a new window.
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