Four new schemes for microprogram control design with programmable logic arrays (PLAs) are proposed. The general structure of the first three schemes consists of three units namely, the microcode memory (ROM), the microsequencer PLA, and a register-counter. The basic idea is to store only branching information, by means of control constructs or transactions, in the PLA(s). These transactions have simple jump-type or continue-type formats with only the jump being embedded in PLA(s). A more general structure, scheme 4, is also proposed with the objective to generate powerful transactions implementing complex control constructs, such as microsubroutines, nested microprogram loops, etc., in addition to multiway branch capability. These transactions contain horizontally formatted directive bits and, hence, they exhibit a measure of parrallelism. The aim is to transform the sequencing structure of a microprogram into a “program” composed of these transactions. However, a directive-driven processor is required to execute each transaction in order to produce the desired address.
End of preview. The entire article is 14 pages. To view the full-text, please rent this article to continue.
/lp/association-for-computing-machinery/hardware-microcontrol-schemes-using-plas-OvV4Rce7Os
Welcome to DeepDyve! Rent Premier Research Articles and Save Up to 90%
Hardware microcontrol schemes using PLAs
Papachristou, Christos A.
Follow ACM SIGMICRO Newsletter
, Volume 12 (4)
Association for Computing Machinery – Dec 1, 1981
More Info
More Like This Article
View All dataSource[]=actageo&dataSource[]=aspet&dataSource[]=aaos&dataSource[]=aacc&dataSource[]=aacr&dataSource[]=aea&dataSource[]=aip&dataSource[]=ajnr&dataSource[]=ams&dataSource[]=aps_physical&dataSource[]=appi_book&dataSource[]=appi_journal&dataSource[]=apha&dataSource[]=asip&dataSource[]=asm&dataSource[]=asn&dataSource[]=aspb&dataSource[]=avs&dataSource[]=annual_reviews&dataSource[]=arxiv&dataSource[]=acm&dataSource[]=berghahn&dataSource[]=cabi&dataSource[]=clinical_trials&dataSource[]=dailymed&dataSource[]=degruyter&dataSource[]=du_press&dataSource[]=esa&dataSource[]=eu_press&dataSource[]=elsevier&dataSource[]=emerald&dataSource[]=ejtr&dataSource[]=emea&dataSource[]=epo&dataSource[]=faseb&dataSource[]=gsa&dataSource[]=health_affairs&dataSource[]=hindawi&dataSource[]=imanager&dataSource[]=imedpub&dataSource[]=informa_healthcare&dataSource[]=informs&dataSource[]=iop&dataSource[]=iucr&dataSource[]=iospress&dataSource[]=jbjs&dataSource[]=leftcoast&dataSource[]=lu_press&dataSource[]=mesharpe&dataSource[]=mary_ann_liebert&dataSource[]=medline&dataSource[]=mit_press&dataSource[]=nature&dataSource[]=oxford&dataSource[]=pier_professional&dataSource[]=pnas&dataSource[]=portlandpress&dataSource[]=psyc_articles&dataSource[]=psyc_books&dataSource[]=psyc_critiques&dataSource[]=plos_journal&dataSource[]=pubmed_central&dataSource[]=rsna&dataSource[]=rockefeller&dataSource[]=rcn&dataSource[]=ria&dataSource[]=rsc&dataSource[]=sage&dataSource[]=spie&dataSource[]=springer_journal&dataSource[]=springer&dataSource[]=taylor_francis&dataSource[]=aps&dataSource[]=the_scientist&dataSource[]=uc_press&dataSource[]=uspto_abstract&dataSource[]=wiley&dataSource[]=pct
© 2012 DeepDyve, Inc. All rights reserved.
Terms of Service | Privacy Policy
