Arithmetic registers allow the full set of computational instructions including all floating point operations.
2.
Four of the arithmetic registers are also index registers ( the sets overlap index register X12 is arithmetic register A0 ).
3.
Four of the arithmetic registers are also index registers ( the sets overlap index register X12 is arithmetic register A0 ).
4.
{{ Quote | text = " The arithmetic registers of the ALWAC computer are circulating loops of information one word in length.
5.
Some machine instructions can be executed directly by the hardware, since their effects are entirely contained within the elements managed by the control program, such as memory locations and arithmetic registers.
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In addition to four one-word registers, the drum has four 32-word channels of working storage from which instructions are picked up to be carried out and data picked up to be operated on in the arithmetic registers.
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The most interesting feature of the AN / UYK-1 instruction set was that the machine-language instructions had two operators that could simultaneously manipulate the arithmetic registers, for example complementing the contents of one register while loading or storing another.
8.
Arithmetic registers were provided for both halves of the data word and included an accumulator, an A register that held the data value retrieved from memory, and a B register that held the least significant bits of a multiplication, the magnitude of a division, as well as shifted bits.
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