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<html><body><a href="doc094.html"><img src=../icons/next.gif alt="Next"></a><a href="doc000.html"><img src=../icons/up.gif alt="Up"></a><a href="doc092.html"><img src=../icons/previous.gif alt="Previous"></a><a href="doc000.html"><img src=../icons/contents.gif alt="Contents"></a><a href="doc123.html"><img src=../icons/index.gif alt="Index"></a><hr><h2><a name="sC.10">C.10 Porting</a></h2><title>Porting</title><p> The ability of any Alpha-based machine to run Linux is really only limitedby your ability to get information on the gory details of its innards. Sincethere are Linux ports for the E66, EB64+ and EB164 boards, all systems based onthe 21066, 21064/APECS or 21164/ALCOR should run Linux with little or nomodification. The major thing that is different between any of thesemotherboards is the way that they route interrupts. There are three sources ofinterrupts:<p><ul><li> on-board devices<li> PCI devices<li> ISA devices</ul><p> All the systems use an Intel System I/O bridge (SIO) to act as abridge between PCI and ISA (the main I/O bus is PCI, the ISA bus is asecondary bus used to support slow-speed and 'legacy' I/Odevices). The SIO contains the traditional pair of daisy-chained8259s.<p> Some systems (e.g., the Noname) route all of their interruptsthrough the SIO and thence to the CPU. Some systems have a separateinterrupt controller and route all PCI interrupts plus the SIOinterrupt (8259 output) through that, and all ISA interrupts throughthe SIO.<p> Other differences between the systems include:<p><ul><li> how many slots they have<li> what on-board PCI devices they have<li> whether they have Flash or EPROM</ul><p><p><hr><a href="doc094.html"><img src=../icons/next.gif alt="Next"></a><a href="doc000.html"><img src=../icons/up.gif alt="Up"></a><a href="doc092.html"><img src=../icons/previous.gif alt="Previous"></a><a href="doc000.html"><img src=../icons/contents.gif alt="Contents"></a><a href="doc123.html"><img src=../icons/index.gif alt="Index"></a><hr></body></html>⌨️ 快捷键说明
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