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<html><body><a href="doc090.html"><img src=../icons/next.gif alt="Next"></a><a href="doc000.html"><img src=../icons/up.gif alt="Up"></a><a href="doc088.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.6">C.6 The chip-sets</a></h2><title>The chip-sets</title><p>DS sells two CPU support chipsets. The 2107x chipset (aka APECS) is a21064(A) support chiset. The 2117x chipset (aka ALCOR) is a 21164 supportchipset. There will also be 2117xA chipset (aka ALCOR 2) as a 21164A supportchipset.<p> Both chipsets provide memory controllers and PCI host bridges for theirCPU. APECS provides a 32-bit PCI host bridge, ALCOR provides a 64-bit PCI hostbridge which (in accordance with the requirements of the PCI spec) can supportboth 32-bit and 64-bit PCI devices.<p>APECS consists of 6, 208-pin chips (4, 32-bit data slices (DECADE), 1system controller (COMANCHE), 1 PCI controller (EPIC)). It provides a DRAMcontroller (128-bit memory bus) and a PCI interface. It also does all the workto maintain memory coherence when a PCI device DMAs into (or out of) memory.<p> ALCOR consists of 5 chips (4, 64-bit data slices (Data Switch, DSW) -208-pin PQFP and 1 control (Control, I/O Address, CIA) - a 383 pin plastic PGA).It provides a DRAM controller (256-bit memory bus) and a PCI interface. Italso does all the work required to support an external Bcache and tomaintain memory coherence when a PCI device DMAs into (or out of) memory.<p> There is no support chipset for the 21066, since the memory controller andPCI host bridge functionality are integrated onto the chip.<p><p><hr><a href="doc090.html"><img src=../icons/next.gif alt="Next"></a><a href="doc000.html"><img src=../icons/up.gif alt="Up"></a><a href="doc088.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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