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Difference between revisions of "national semiconductor/imp-4"
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| − | The '''National IMP-4''' 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/ | + | The '''National IMP-4''' 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}}. |
{| class="wikitable" style="float: right;" | {| class="wikitable" style="float: right;" | ||
| − | ! colspan=" | + | ! colspan="3" | Family Members |
|- | |- | ||
| − | ! Part !! Description | + | ! Part<br />(Commercial) !! Part<br />(Military) !! Description |
|- | |- | ||
| − | | {{national|IMP-4A/ | + | | {{national|IMP-4A/520}} || {{national|IMP-4A/420}} || Bundled Kit, CROM + RALU |
|- | |- | ||
| − | | {{national|IMP-00A/ | + | | {{national|IMP-4A/521}} || {{national|IMP-4A/421}} || Control and Read-only Memory (CROM) |
| + | |- | ||
| + | | {{national|IMP-00A/520}} || {{national|IMP-00A/420}} || Register and Arithmetic Logic Unit (RALU) | ||
|} | |} | ||
Revision as of 17:07, 5 November 2015
The National IMP-4 is a family of multi-chip 4-bit 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 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.
| 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) |
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