The R2000 design came, in about 1987, from the
StanfordMIPS project, which stood for Microprocessor
without Interlocked Pipeline Stages.
Like the AMD 29000, the R2000 has no condition code register considering it a potential bottleneck. The
program counter can be read like other registers.
The CPU includes an MMU that can also control a cache, and
the CPU can operate as big-endian or little-endian. There
is a FPU, the R2010.
Our goal was to translate most user mode MIPS programs compiled for a MIPS R2000 or R3000 machine running ULTRIX Release 4.0 (or later) to run identically on the DEC OSF/1 AXP system with acceptable performance.
The progress that has been made during the last three or four years is well illustrated by comparing the MIPS R2000 processor developed in 1986 with two-micron technology, with the Intel i860 developed in 1989.
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