Fujitsu > FujitsuMB86903-40
Modified: May 25, 2005, 3:42 am
Data Code:9321
Package:207 PGA
Process:0.5 Micron
Architecture:32 bit RISC
Used in:Workstations and Servers
Description:SPARC, or the Scalable (originally Sun) Processor
ARChitecture was designed by Sun Microsystems for
their own use. Sun was a maker of workstations,
and used standard 68000-based CPUs and a standard
operating system, Unix. Research versions of load-
store processors had promised a major step
forward in speed but existing manufacturers were
slow to introduce a RISC processor, so Sun went
ahead and developed its own (based on Berkeley's
design). In keeping with their open philosophy,
they licensed it to other companies, rather than
manufacture it themselves.

SPARC was not the first RISC processor. The AMD
29000 (see below) came before it, as did the MIPS
R2000 (based on Stanford's experimental design)
and Hewlett-Packard PA-RISC CPU, among others.
The SPARC design was radical at the time, even
omitting multiple cycle multiply and divide
instructions (added in later versions), using
repeated single-cycle "step" instructions instead
(similar in idea to the square root step
instruction in the Transputer T-800), while most
RISC CPUs were more conventional.