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{{national title|IMP-4}}
 
{{national title|IMP-4}}
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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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{{ic family
 +
| title            = National IMP-4
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| image            = <!-- Image representation of the IC family, e.g. "MCS-4.jpg"  -->
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| caption          = <!-- description of the image                                  -->
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| developer        = National Semiconductor
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| manufacturer      = National Semiconductor
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| production start  = March, 1973
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| production end    = 1977
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| release          = March, 1973
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| arch              = 4-bit bit-slice
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| word              = 4 bit
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| proc              = 10 μm
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| tech              = pMOS
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| clock min        = 500 kHz
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| clock max        = 750 kHz
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| package          = DIP24
 +
}}
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The '''National IMP-4''' (originally '''National GPC/P''') was 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 1973. 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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{| class="wikitable" style="float: right;"
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==2nd sources==
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[[Rockwel]] was the only 2nd source for the IMP-4 series. Some USSR clones are known to exist.
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== Design ==
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{{empty section}}
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== Members ==
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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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== Design ==
 
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{{empty section}}
 
  
  
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[[Category:National Semiconductor microprocessors]]
 
[[Category:National Semiconductor microprocessors]]
 
[[Category:4-bit microprocessors]]
 
[[Category:4-bit microprocessors]]
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[[Category:1974 microprocessors]]
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[[Category:1973 microprocessors]]
 
[[Category:microprocessor families]]
 
[[Category:microprocessor families]]
 
[[Category:National IMP-4]]
 
[[Category:National IMP-4]]

Latest revision as of 23:32, 18 May 2016

National IMP-4
no photo (ic).svg
Developer National Semiconductor
Manufacturer National Semiconductor
Production March, 1973-1977
Release date March, 1973
Architecture 4-bit bit-slice
Word size 4 bit
0.5 octets
1 nibbles
Process 10 μm
10,000 nm
0.01 mm
Technology pMOS
Clock 500 kHz-750 kHz
Package DIP24

The National IMP-4 (originally National GPC/P) was a family of multi-chip 4-bit bit-slice microprocessor developed by National Semiconductor and introduced in 1973. Units could be combined to implement systems with 4 to 32-bit words. The IMP-8 and IMP-16 families were made using the IMP-4 logic. The IMP-4 had 2 chips: a control unit and an ALU, some systems used the RALU with custom control circuitry. The RALU was the first bit-slice microprocessor - predating both the 3000 and the am2900.

2nd sources[edit]

Rockwel was the only 2nd source for the IMP-4 series. Some USSR clones are known to exist.

Design[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Members[edit]

Family Members
Part
(Commercial) 		Part
(Military) 		Description
IMP-4A/520 IMP-4A/420 Bundled Kit, CROM + RALU
IMP-4A/521 IMP-4A/421 Control and Read-only Memory (CROM)
IMP-00A/520 IMP-00A/420 Register and Arithmetic Logic Unit (RALU)


Text document with shapes.svg This article is still a stub and needs your attention. You can help improve this article by editing this page and adding the missing information.
Retrieved from "https://en.wikichip.org/w/index.php?title=national_semiconductor/imp-4&oldid=20183"
Facts about "IMP-4 - National Semiconductor"
RDF feed
designerNational Semiconductor +
full page namenational semiconductor/imp-4 +
instance ofintegrated circuit family +
main designerNational Semiconductor +
manufacturerNational Semiconductor +
nameNational IMP-4 +
packageDIP24 +
process10,000 nm (10 μm, 0.01 mm) +
technologypMOS +
word size4 bit (0.5 octets, 1 nibbles) +