The R2000 is a 32-bit microprocessor chip set developed by MIPS Computer Systems that implemented the MIPS I instruction set architecture (ISA). Introduced in January 1986, it was, by a few months, the first commercial implementation of the RISC architecture. The R2000 competed with Digital Equipment Corporation (DEC) VAX minicomputers and with Motorola 68000 and Intel Corporation 80386 microprocessors. R2000 users included Ardent Computer , DEC, Silicon Graphics , Northern Telecom and MIPS's own Unix workstations.
14-472: (Redirected from R-2000 ) R2000 or R-2000 might refer to: R2000 (microprocessor) , a microprocessor developed by MIPS Computer Systems Pratt & Whitney R-2000 , an aircraft engine R-2000 program , a Natural Resources Canada program for the construction of energy efficient homes Robin R2000 , a French aircraft [REDACTED] Topics referred to by
28-549: A 5-stage instruction pipeline , enabling execution at a rate approaching one instruction per cycle, unusual for its time. This MIPS generation supports up to four co-processors. In addition to the CPU core, the R3000 microprocessor includes a Control Processor (CP), which contains a Translation Lookaside Buffer and a Memory Management Unit . The CP works as a coprocessor . Besides the CP,
42-443: A complete circuit board to ensure good cache bus timings. In 1987 system builders began using the chip set in arbitrary new board designs. The R2000 was available in 8.3, 12.5 and 15 MHz grades. The die contained 110,000 transistors and measured 80 mm in a 2.0 μm double-metal CMOS process. MIPS was a fabless semiconductor company, that is, they did not have the capability to fabricate integrated circuits. The chip set
56-452: A small translation lookaside buffer for mapping virtual memory addresses. The R2010 chip held the floating point registers, floating point data paths, and their longer simple pipeline. Writes to main memory DRAM took tens of cycles to fully complete. But the R2020 chips queued and completed up to 4 pending writes to main memory, allowing the R2000 core to proceed without stalling itself. In
70-827: Is a 32-bit RISC microprocessor chipset developed by MIPS Computer Systems that implemented the MIPS I instruction set architecture (ISA). Introduced in June 1988, it was the second MIPS implementation, succeeding the R2000 as the flagship MIPS microprocessor. It operated at 20, 25 and 33.33 MHz. The MIPS 1 instruction set is small compared to those of the contemporary 80x86 and 680x0 architectures, encoding only more commonly used operations and supporting few addressing modes . Combined with its fixed instruction length and only three different types of instruction formats, this simplified instruction decoding and processing. It employed
84-529: Is different from Wikidata All article disambiguation pages All disambiguation pages R2000 (microprocessor) The chip set consisted of the R2000 microprocessor, R2010 floating-point accelerator, and four R2020 write buffer chips. The core R2000 chip executed all non-floating-point instructions with a simple short pipeline. This chip also controlled the external code and data caches, made of fast standard SRAM chips organized with direct indexing and one-cycle read latency. The R2000 chip contained
98-453: The R3000 can also support an external R3010 numeric coprocessor, along with two other external coprocessors. The R3000 CPU does not include level 1 cache . Instead, its on-chip cache controller operates external data and instruction caches of up to 256 KB each. It can access both caches during the same clock cycle. The R3000 found much success and was used by many companies in their workstations and servers. Users included: The R3000
112-415: The absence of cache misses, this chip set sustained an instruction completion rate of one instruction per ALU cycle. This was more efficient than non-RISC microprocessors of that time, which needed several cycles per instruction. The initial R2000A, clocked at 12.5 MHz, offered 8-10 Million integer Instructions Per Second (MIPS), or 0.9 Million FLoating Point Operations Per Second (MFLOPS), and would appear in
126-629: The chip set in its PACE-I 0.8 μm double-metal CMOS process and marketed it as the PR2000. In 1988, an improved version was introduced, the R2000A. It was composed of the R2000A and R2010A ICs. It operated at 12.5 and 16.67 MHz. It has been used extensively in embedded applications such as printer controllers. In 1988, the R2000 was followed by the R3000 , using a similar overall system design but faster chip implementation. R3000 The R3000
140-454: The like of the 1987 SGI IRIS 4D and 1988 DECstation 2100 workstations. 1986 also saw similar technology in Sun's first SPARC microprocessor, Hewlett Packard's first PA-RISC microprocessor, and the first Acorn RISC Machine (ARM) evaluation kits shipping to developers. Overall speed was limited by the cache size and cache cycle time. The R2000 chip set and SRAM was initially sold only as
154-449: The same term This disambiguation page lists articles associated with the same title formed as a letter–number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=R2000&oldid=676060151 " Category : Letter–number combination disambiguation pages Hidden categories: Short description
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#1732771956037168-441: Was a further development of the R2000 with minor improvements including larger TLB and a faster bus to the external caches. The R3000 die contained 115,000 transistors and measured about 75,000 square mils (48 mm ). MIPS was a fabless semiconductor company, so the R3000 was fabricated by MIPS partners including Integrated Device Technology (IDT), LSI Logic , NEC Corporation , Performance Semiconductor , and others. It
182-418: Was fabricated in a 1.2 μm complementary metal–oxide–semiconductor (CMOS) process with two levels of aluminium interconnect . The R3000 was also used as an embedded microprocessor. When advances in technology rendered it obsolete for high-performance systems, it found continued use in lower-cost designs. Companies such as LSI Logic and Integrated Device Technology developed derivatives of
196-469: Was initially fabricated for MIPS by Sierra Semiconductor and Toshiba . In December 1987, MIPS licensed Integrated Device Technology , LSI Logic , and Performance Semiconductor to also fabricate and market the R2000. Sierra and Toshiba continued to serve as foundries. LSI fabricated the chip set in its 2.0 μm double-metal CMOS process and marketed it as the LR2000. Performance Semiconductor fabricated
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