Service manual

C-4 Sun Ultra 2 Series Service Manual • July 1996
Note – The PrestoServe™ 2.4.2 release is incompatible with the Solaris 2.5.1
software environment when running on a Sun Ultra 2 Series system. For information
about working around that problem, refer to SMCC Open Issues Supplement Solaris
2.5.1, part number 802-5340.
C.1.3 UltraSPARC I Processor
The UltraSPARC I processor is mounted on a module that is plugged into the system
unit or server motherboard. Up to two modules are supported, one CPU for each
module.
The UltraSPARC I processor has the following features:
■ SPARC V9 compatibility:
■ V9 specifies a 64-bit instruction set architecture that is compatible with the
32-bit SPARC V8 architecture.
■ V9 provides for 64-bit data and addressing as well as other features to enhance
operating system and application performance.
■ Implements 44-bit virtual address bits and 41-bit physical address bits.
■ Implements the visual instruction set (VIS) used by the UPA graphics device to
provide optimal graphics performance (this also includes instructions to help
with imaging performance).
■ Execution of up to four instructions in parallel (one memory access, two integer
ALU instructions, one floating point add class, one floating point multiply class,
and one control transfer instruction).
■ Each module receives a separate programmable core voltage to permit mixing of
modules with different power requirements.
■ Each module is thermo-coupled for temperature sensing; Ultra 2 series provides
two levels; warning and shut-down.
UltraSPARC I processor performance characteristics include:
■ 249 SpecInt92, 349 SpecFP92 for 168-MHz uniprocessor
■ 332 SpecInt92, 505 SpecFP92 for 200-MHz multiprocessor
C.1.4 UltraSPARC II Processor
The UltraSPARC II processor is a high-performance, highly-integrated superscalar
processor implementing the SPARC-V9 64-bit RISC architecture. The UltraSPARC II
processor is capable of sustaining the execution of up to four instructions per cycle