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{{Architecture sizes}} | {{Architecture sizes}} | ||
− | The '''4-bit [[architecture]]''' is a [[microprocessor | + | The '''4-bit [[computer architecture|architecture]]''' is a [[microprocessor]] architecture that has a [[datapath]] width or a highest [[operand]] width of 4 bits or a [[nibble]]. These architectures typically have a matching [[register file]] with [[registers]] width of 4 bits and 8-bit wide addresses. |
== Industry == | == Industry == | ||
− | Most of the first [[microprocessor]]s during the early 1970s had 4-bit [[word]] | + | Most of the first [[microprocessor]]s during the early 1970s had 4-bit [[word]] length. Both the Intel[[Intel 4004|4004]] and the [[Intel 4040|4040]] were 4-bits. The world's first single-chip microprocessor by Texas Instruments, the [[TMS1000]], was also a 4-bit CPU. 4-bit word were proven to be very limiting and by 1974 there was a shift to larger architectures such as [[8-bit architecture|8-]] and [[12-bit architecture]] architectures. |
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== Applications == | == Applications == | ||
− | Most | + | Most 4-bit [[microprocessor]]s were used almost exclusively in calculators and toys. 4 bits was a logical choice for many calculators that used [[binary coded decimal|BDC]] numbers representation. |
− | + | == 4-bit microprocessor == | |
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− | == 4-bit | ||
* {{amd|Am2900|AMD Am2900}} | * {{amd|Am2900|AMD Am2900}} | ||
− | * | + | * [[AMI 9209]] |
* {{fairchild|4700|Fairchild 4700}} | * {{fairchild|4700|Fairchild 4700}} | ||
* {{fairchild|9400|Fairchild 9400}} | * {{fairchild|9400|Fairchild 9400}} | ||
− | * | + | * [[Fairchild PPS-25]] |
+ | * [[Hitachi HD35404]] | ||
* [[HP Saturn]] (64-bit register, 4-bit data path) | * [[HP Saturn]] (64-bit register, 4-bit data path) | ||
− | * {{intel|4004|Intel 4004}} | + | * {{intel|4004|Intel 4004}} |
* {{intel|4040|Intel 4040}} | * {{intel|4040|Intel 4040}} | ||
− | * {{motorola| | + | * {{mmi|5700|MMI 5700}} |
+ | * {{motorola|mc10800 series|Motorola MC10800}} | ||
* {{national|IMP-4|National IMP-4}} | * {{national|IMP-4|National IMP-4}} | ||
− | * | + | * [[Rockwell PPS-4]]/1 |
+ | * [[Rockwell PPS-4/2]] | ||
+ | * [[TMS1000]] | ||
+ | * [[Toshiba T3472]] | ||
== 4-bit microcontrollers == | == 4-bit microcontrollers == | ||
− | * | + | * [[AMI S2000]] |
− | + | * [[Epson S1C63]] | |
− | + | * {{fujitsu|MB8840|Fujitsu MB8840}} | |
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− | * {{fujitsu|MB8840|Fujitsu MB8840 | ||
* {{fujitsu|MB8850|Fujitsu MB8850}}/{{fujitsu|MB88500|500}} | * {{fujitsu|MB8850|Fujitsu MB8850}}/{{fujitsu|MB88500|500}} | ||
− | * | + | * [[Hitachi HD404729S]] |
* {{hitachi|HMCS40|Hitachi HMCS40}} | * {{hitachi|HMCS40|Hitachi HMCS40}} | ||
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* {{itt|7150|ITT 7150}} | * {{itt|7150|ITT 7150}} | ||
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* {{national|MAPS|National MAPS}} | * {{national|MAPS|National MAPS}} | ||
+ | * {{national|MM5700|National MM5700}} | ||
* {{national|COPS I|National COPS I}} | * {{national|COPS I|National COPS I}} | ||
* {{national|COPS II|National COPS II}} | * {{national|COPS II|National COPS II}} | ||
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* {{nec|μCOM-4|NEC μCOM-4}} | * {{nec|μCOM-4|NEC μCOM-4}} | ||
* {{nec|μPD751|NEC μPD751}} | * {{nec|μPD751|NEC μPD751}} | ||
* {{nec|μPD707|NEC μPD707}} | * {{nec|μPD707|NEC μPD707}} | ||
− | * {{ | + | * {{matsushita|MN1400 series|Matsushita MN1400}} |
− | * {{ | + | * {{matsushita|MN1500 series|Matsushita MN1500}} |
− | * {{ | + | * {{mitsu|MELPS 4|Mitsubishi MELPS 4}} |
− | * | + | * [[MARC4]] |
− | * | + | * [[OKI MSM6411]] |
− | * | + | * [[Sanyo LM6402G]] |
− | * [[Sanyo | + | * [[Sanyo LC587004]] |
− | * [[Sanyo | + | * [[Sanyo LC587008]] |
− | * [[Sanyo | + | * [[Sanyo LC58E68]] |
− | + | * [[Sharp SM552]] | |
− | * [[ | + | * [[Toshiba TLCS-47]] |
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* {{wd|CR1872 series|WD CR1872}} | * {{wd|CR1872 series|WD CR1872}} | ||
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[[Category:4-bit microprocessors]] | [[Category:4-bit microprocessors]] |