Microcode: Difference between revisions

Revision as of 14:39, 25 August 2024

Revision as of 14:46, 25 August 2024

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* The [[MCP-1600]] is a [[microprocessor]] made by [[Western Digital]] from 1975 through the early 1980s. It was used to implement three different computer architectures in microcode: the [[Pascal MicroEngine]], the [[WD16]], and the [[Digital Equipment Corporation|DEC]] [[PDP-11#LSI-11|LSI-11]], a cost-reduced PDP-11.<ref>{{cite web |url=http://www.antiquetech.com/?page_id=782 |title=Western Digital 1600 |publisher=AntiqueTech |access-date=5 January 2017 |url-status=dead |archive-url=https://web.archive.org/web/20170103021205/http://www.antiquetech.com/?page_id=782 |archive-date=3 January 2017}}</ref>

* Earlier [[x86]] processors are fully microcoded. x86 processors implemented [[patchable microcode]] (patch by [[BIOS]] or [[operating system]]) since [[P6 (microarchitecture)|Intel P6 microarchitecture]] and [[Athlon|AMD K7 microarchitecture]]. Such processors implemented microcode ROM and microcode SRAM in their silicon.

* Some [[video card]]s, and [[wireless network interface controller]]s implementedimplement patchable microcode (patch by operating system). Such microcode is patched to device's [[Static random-access memory|SRAM]] or [[DRAM]], for example, [[GDDR SDRAM]] of a [[video card]].

==Implementation==