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68 Chapter 5: Matrox 4Sight-II hardware reference
MMX and SSE
technology
Cache
• A serial port controller.
• A digital audio controller.
• Power management features.
The VT82C686B south bridge interfaces with the BIOS, via an 8-bit ISA bus. In
addition, it interfaces with the 440BX north bridge via the 32-bit PCI local bus.
The Intel Celeron and Intel Pentium III processors both use multimedia extension
(MMX) Technology. This technology, an extension to the Intel architecture, is
designed specifically to accelerate multimedia and imaging applications. It
addresses the key characteristics of applications that must handle large amounts
of image, video, and graphics data.
The Celeron and Pentium III processors also use single SIMD extension (SSE)
technology. This is the second set of instructions designed to enhance multimedia
operations.
Both the Intel Celeron and Pentium III microprocessors have primary (Level 1)
and secondary (Level 2) caches. Both caches are located on-die (on the processor).
The Intel Celeron processor incorporates a 32 Kbyte, non-blocking, primary
cache, which is separated into a 16 Kbyte data cache, and 16 Kbyte instruction
cache. It also incorporates a unified (non-separated) 128 Kbyte, non-blocking,
secondary cache.
The Intel Pentium III processor also incorporates a 32 Kbyte, non-blocking,
primary cache, separated into a 16 Kbyte data cache, and 16 Kbyte instruction
cache. It also incorporates a 256 Kbyte, non-blocking, secondary cache, called
Advanced Transfer Cache.
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