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- Millicode abstract "In computer architecture, millicode is a higher level of microcode used to implement the instruction set of a computer. Millicode runs on top of the microcoded instructions and uses those instructions to implement more complex instructions visible to the user of the system. Implementation of millicode requires a special processor mode called millimode that provides its own set of registers, and possibly its own special instructions invisible to the user.IBM invented both the concept and the term millicode for the System/390 9672-G4 processor in 1997. The following are cited as advantages of millicode: More complex instructions can easily be constructed from several millicode instructions. Construction of a compatible line of computer models with different performance is simplified. Millicode instructions can bypass CPU cache to improve performance. Instructions can update multiple storage locations without concern for being interrupted. Millicode can execute instructions at a higher privilege level without involving the operating system. Millicode can provide a complex instruction as if it were a subroutine, making user code smaller.The \"i370\" code for the \"Capitol\" chipset used in some ES/9370 models was similar to millicode, in that it was written as a combination of System/370 instructions and code that had access to special hardware features.".
- Millicode wikiPageExternalLink The%20What%20and%20Why%20of%20System%20z%20Millicode%20-%20%2311773.pdf.
- Millicode wikiPageID "38329630".
- Millicode wikiPageLength "2621".
- Millicode wikiPageOutDegree "12".
- Millicode wikiPageRevisionID "699206056".
- Millicode wikiPageWikiLink CPU_cache.
- Millicode wikiPageWikiLink Category:Central_processing_unit.
- Millicode wikiPageWikiLink Category:Instruction_processing.
- Millicode wikiPageWikiLink Category:Instruction_set_architectures.
- Millicode wikiPageWikiLink Category:Microprocessors.
- Millicode wikiPageWikiLink Computer_architecture.
- Millicode wikiPageWikiLink IBM.
- Millicode wikiPageWikiLink IBM_9370.
- Millicode wikiPageWikiLink 390.
- Millicode wikiPageWikiLink Instruction_set.
- Millicode wikiPageWikiLink Microcode.
- Millicode wikiPageWikiLink PALcode.
- Millicode wikiPageWikiLinkText "Millicode".
- Millicode wikiPageWikiLinkText "millicode".
- Millicode wikiPageUsesTemplate Template:CPU_technologies.
- Millicode wikiPageUsesTemplate Template:Cite_web.
- Millicode wikiPageUsesTemplate Template:Portal.
- Millicode wikiPageUsesTemplate Template:Reflist.
- Millicode subject Category:Central_processing_unit.
- Millicode subject Category:Instruction_processing.
- Millicode subject Category:Instruction_set_architectures.
- Millicode subject Category:Microprocessors.
- Millicode type Architecture.
- Millicode type Circuit.
- Millicode type Architecture.
- Millicode comment "In computer architecture, millicode is a higher level of microcode used to implement the instruction set of a computer. Millicode runs on top of the microcoded instructions and uses those instructions to implement more complex instructions visible to the user of the system.".
- Millicode label "Millicode".
- Millicode sameAs Q16155681.
- Millicode sameAs m.0q3yvd9.
- Millicode sameAs Q16155681.
- Millicode wasDerivedFrom Millicode?oldid=699206056.
- Millicode isPrimaryTopicOf Millicode.