[State of Electronics] have released their latest video about ARCTURUS, the 14th video in their series The Computer History of Australia.
ARCTURUS was a research computer system developed on a shoestring budget at Sydney University in the 1960s, and was in service until 1975. Particularly the system was developed by [David Wong] as a part of his PhD thesis: The design and construction of the digital computers snocom, nimbus and arcturus (PDF). [David] worked in collaboration with [Kevin R. Rosolen] who is interviewed in the video.
The machine is described as a fixed-point, binary, parallel, single address, general-purpose digital computer using packaged diode-transistor circuits. Ferrite-core memory was used instead of drum memory because drum memory was too slow and performance was a high priority feature. For the same reason parallel features were implemented where serial might have been done more simply, if it hadn’t been so slow. In addition to the ferrite-core there were paper-tape peripherals and control panels.
The machine supported 32 distinct instructions and had a 13-bit address space allowing it to directly address 8,192 words, each word comprising 20-bits. Those word bits were one sign bit and nineteen magnitude bits for fixed-point two’s complement binary numbers.
We covered The Computer History of Australia by [State of Electronics] back when they released their 5th video in the series, Australia’s Silliac Computer, if you’re interested in more history of computing in Australia.
This articles is written by : Fady Askharoun Samy Askharoun
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