https://gunkies.org/index.php?action=history&feed=atom&title=M-bus 2026-06-12T23:08:15Z Revision history for this page on the wiki MediaWiki 1.30.1 https://gunkies.org/w/index.php?title=M-bus&diff=32973&oldid=prev 2024-01-15T12:10:26Z

<p>Stubby, but gives the basics</p> <p><b>New page</b></p><div>The '''M-bus''' from [[Digital Equipment Corporation|DEC]] was a unique [[synchronous]] [[bus]] used in some [[VAXstation]]s. It supported a 32-bit [[main memory]] [[address space]], and 32-bit data transfers (although memory operations always transferred 4 longwords of data at a time).<br /> <br /> [[Arbitration]] for use of the M-bus used a distributed [[Least Recently Used algorithm|LRU]] mechanism. The M-bus had considerable support for [[cache]]s, including the capability to allow caches in [[Central Processing Unit|CPUs]] connected to the M-bus to maintain consistent data. The M-bus also supported [[interrupt]]s from [[peripheral]]s to CPUs. It used [[parity]] for [[error detection]].<br /> <br /> {{semi-stub}}<br /> <br /> ==External links==<br /> <br /> * [http://www.bitsavers.org/pdf/dec/vax/35x0/firefox_MBusSpec_198712.pdf Firefox Workstation M-Bus Specification]<br /> <br /> [[Category: DEC Buses]]</div>

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