C-8 Sun Ultra 60 Service Manual • August 2001

C.1.4.5 Audio

Audio has been moved on to a plug-in module using a Crystal Semiconductor
CS4231 codec chip.
C.1.5 UltraSPARC II Processor
The UltraSPARCII processor is a high-performance, highly-integrated superscalar
processor implementing the SPARC-V9 64-bit RISC architecture. The UltraSPARCII
processor is capable of sustaining the execution of up to four instructions per cycle
even in the presence of conditional branches and cache misses. This sustained
performance is supported by a decoupled prefetch and dispatch unit with instruction
buffer. The UltraSPARCII processor supports both 2D and 3D graphics, as well as
image processing, video compression and decompression, and video effects through
the sophisticated visual instruction set (VIS). VIS provides high levels of multimedia
performance, including real-time video compression/decompression and two streams
of MPEG-2 decompression at full broadcast quality with no additional hardware
support. The UltraSPARCII processor provides a 2-Mbyte ecache, with an 300-MHz
operating frequency.
UltraSPARCII processor characteristics and associated features include:
■SPARC-V9architecture compliant
■Binary compatible with all SPARCapplication code
■Multimedia capable visual instruction set (VIS)
■Multiprocessing support
■Glueless four-processor connection with minimum latency
■Snooping cache coherency
■Four-way superscalar design with nine execution units; four integer
execution units
■Three floating-point execution units
■Twographics execution units
■Selectable little- or big-endian byte ordering
■64-bit address pointers
���16-Kbyte non-blocking data cache
■16-Kbyte instruction cache; single cycle branch following
■Power management
■Software prefetch instruction support
■Multiple outstanding requests