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| {{Distinguish|bit|One instruction set computer}} | {{Distinguish|bit|One instruction set computer}} | ||
| ⚫ | {{multiple issues| | ||
| ⚫ | {{refimprove|date=August 2012}} | ||
| ⚫ | {{primary sources|date=August 2012}} | ||
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| {{Computer architecture bit widths}} | {{Computer architecture bit widths}} | ||
| A '''1-bit''' ] is an ] for a processor that has ] widths and ] widths of 1 bit (1/8 ]) wide. | A '''1-bit''' ], also called '''Boolean processor''', is an ] for a processor that has ] widths and ] widths of 1 bit (1/8 ]) wide. | ||
| An example of a 1-bit architecture actually marketed as a CPU is the ] Industrial Control Unit.<ref>{{cite web|publisher=]|title=MC14500B Industrial Control Unit. Semiconductor Technical Data, Rev. 3|url=http://www.brouhaha.com/~eric/retrocomputing/motorola/mc14500b/mc14500brev3.pdf|year=1995|accessdate=August 1, 2012}}</ref> There are also several design studies for 1-bit architectures in academia, and corresponding 1-bit logic can also be found in programming. | An example of a 1-bit architecture actually marketed as a CPU is the ] Industrial Control Unit.<ref>{{cite web|publisher=]|title=MC14500B Industrial Control Unit. Semiconductor Technical Data, Rev. 3|url=http://www.brouhaha.com/~eric/retrocomputing/motorola/mc14500b/mc14500brev3.pdf|year=1995|accessdate=August 1, 2012}}</ref> There are also several design studies for 1-bit architectures in academia, and corresponding 1-bit logic can also be found in programming. | ||
| Other examples of 1-bit architectures are ]. | Additional ''boolean processors'' are integrated in ]s, for example the ] ] to ]/]/] ] families and derivatives. Other examples of 1-bit architectures are ]. | ||
| A typical sequence of instructions from a program for a 1-bit architecture might be: | A typical sequence of instructions from a program for a 1-bit architecture might be: | ||
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| ==References== | ==References== | ||
| ⚫ | {{multiple issues| | ||
| ⚫ | {{refimprove|date=August 2012}} | ||
| ⚫ | {{primary sources|date=August 2012}} | ||
| ⚫ | }} | ||
| {{Reflist}} | {{Reflist}} | ||
Revision as of 18:03, 8 May 2013
Not to be confused with bit or One instruction set computer.| Computer architecture bit widths |
|---|
| Bit |
| Application |
| Binary floating-point precision |
| Decimal floating-point precision |
A 1-bit computer architecture, also called Boolean processor, 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 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.
Additional boolean processors are integrated in microcontrollers, for example the 8-bit Intel MCS-51 to 8-bit/16-bit/32-bit Intel MCS-251 families and derivatives. 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.
References
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- "MC14500B Industrial Control Unit. Semiconductor Technical Data, Rev. 3" (PDF). Motorola. 1995. Retrieved August 1, 2012.
External links
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