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A 1-bit computer architecture is an instruction set architecture for a processor that has datapath widths and data register widths of 1 bit (1/8 octet) wide. An example of a 1-bit architecture that was actually marketed as a CPU is the Motorola MC14500B Industrial Control Unit. There are also several design studies for 1-bit architectures in academia, and corresponding 1-bit logic can also be found in programming. Most calculators used a bit serial design before using 4-bit and later up to 32-bit processors. Other examples of 1-bit architectures are programmable logic controllers. A typical sequence of instructions from a program for a 1-bit architecture might be: * load digital input 1 into a 1-bit register; * OR the value in the 1-bit register with input 2, leaving the result in the register; * write the value in the 1-bit register to output 1. 1-bit CPUs can be considered obsolete now, not many kinds have been produced (MC14500B and WDR-1 known) and none known to be available in any computer component store (except, , a few on Ebay〔http://www.ebay.com/itm/Motorola-IC-MC14500B-MC14500BCL-100-NEW-/320837692605〕). ==See also== * Bit slicing 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1-bit architecture」の詳細全文を読む スポンサード リンク
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