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.[1] There are also several design studies for 1-bit architectures in academia, and corresponding 1-bit logic can also be found in programming.
Some microprocessors or microcontrollers, for example the Intel MCS-51 to Intel MCS-251 families and derivatives, include a boolean processor. 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.
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