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{{national title|IMP-4}} | {{national title|IMP-4}} | ||
− | + | The '''National IMP-4''' (originally '''National GPC/P''') is a [[microprocessor family|family]] of multi-chip [[4-bit architecture|4-bit]] [[bit-slice microprocessor|bit-slice]] [[microprocessor]] developed by [[National Semiconductor]] and introduced in 1974. Units could be combined to implement systems with 4 to 32-bit words. The {{national|IMP-8}} and {{national|IMP-16}} families were made using the IMP-4 logic. The IMP-4 had 2 chips: a {{national|IMP-4A/521|control unit}} and an ALU, some systems used the {{national|IMP-00A/520|RALU}} with custom control circuitry. The {{national|IMP-00A/520|RALU}} was the first [[bit-slice microprocessor|bit-slice]] microprocessor - predating both the {{intel|3000}} and the {{amd|am2900}}. | |
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− | The '''National IMP-4''' (originally '''National GPC/P''') | ||
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− | {| class="wikitable" | ||
! colspan="3" | Family Members | ! colspan="3" | Family Members | ||
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| {{national|IMP-00A/520}} || {{national|IMP-00A/420}} || Register and Arithmetic Logic Unit (RALU) | | {{national|IMP-00A/520}} || {{national|IMP-00A/420}} || Register and Arithmetic Logic Unit (RALU) | ||
|} | |} | ||
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+ | ==2nd sources== | ||
+ | [[Rockwel]] was the only 2nd source for the IMP-4 series. Some USSR clones are known to exist. | ||
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+ | == Design == | ||
+ | {{empty section}} | ||
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[[Category:National Semiconductor microprocessors]] | [[Category:National Semiconductor microprocessors]] | ||
[[Category:4-bit microprocessors]] | [[Category:4-bit microprocessors]] | ||
− | [[Category: | + | [[Category:1974 microprocessors]] |
[[Category:microprocessor families]] | [[Category:microprocessor families]] | ||
[[Category:National IMP-4]] | [[Category:National IMP-4]] |
Facts about "IMP-4 - National Semiconductor"
designer | National Semiconductor + |
full page name | national semiconductor/imp-4 + |
instance of | integrated circuit family + |
main designer | National Semiconductor + |
manufacturer | National Semiconductor + |
name | National IMP-4 + |
package | DIP24 + |
process | 10,000 nm (10 μm, 0.01 mm) + |
technology | pMOS + |
word size | 4 bit (0.5 octets, 1 nibbles) + |