Santa Clara, Calif.--July 20--QED, Inc. (Santa Clara) announced theavailability of the RM7000 MIPS RISC microprocessor.The RM7000 is the first high-performance embedded microprocessor with on-chip second-level (L2) cache memory that significantly boosts overall systemperformance. QED recently announced that Lucent Technologies selected the RM7000 for their PathStar Access Server.
The RM7000 is designed to meet the requirements of high-performance embeddedapplications such as network routers/switches, printers, games systems,low-end workstations, 3-D accelerators, and industrial control/vision systems.
The RM7000 is a microprocessor with a 12-14 (est) SPECint95 and 14-16 (est) SPECfp95 rating at 300 MHz. It implements the MIPS IV instruction set architecture and features system address/data bus maximum performance at 125MHz for a 1000 MByte peak data transfer rate. It is manufactured using 0.25-m technology. Key features of the RM7000 include: superscalar instruction issue with dual-integer issue,non-blocking caches, 16KB instruction cache and 16KB data cache primary (L1) caches, both 4-way set associative, and an integrated on-chip 256KB 4-way set associative, non-blocking L2 cache.
QED benchmarks for networking applications show that the RM7000 system performance is 3.7 to 6.7 times faster than the RM5271-200MHz. The increase comes from three primary areas of improvement: raw compute power, memoryhierarchy and interrupt handling. The raw compute power was increased bynearly 100 percent with the RM7000's 300MHz CPU and dual-integer issuecapability. The memory hierarchy improvement due to the 256KB of on-chipL2 cache is nearly 60 percent when compared to a RM5271 system with external L2 cache, and 290 percent faster as compared to a RM5271 system withoutexternal L2 cache. An additional 20 percent memory hierarchy enhancement is achieved with the use of the data Prefetch instruction and the implementation of non-blocking caches (for both L1 and L2 caches). An order of magnitude performance improvement in interrupt handling is achieved with the RM7000 by adding hardware support for priority and vectoring with a worst case latency of 166ns when the handler is locked in cache.
QED's RM7000 embedded microprocessor is available now with volumeproduction scheduled for late Q398. The product is priced at $150 for10,000-unit quantities.
Quantum Effect Design, Inc.
Santa Clara, CA
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