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Toshiba R4400
  Toshiba TC86R4400MC-200
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The Toshiba R4400 Processor
The MIPS R4000 series, released in 1991, extended the MIPS instruction set to a full 64-bit architecture and moved the FPU onto the main die to create a single-chip system. The design was so important to SGI, at the time MIPS' major customer, that SGI bought the company in 1992. A number of improved versions soon followed, including the R4400.
The R4x00 processors have been available and used in different versions. PC (as in R4400PC) denotes primary cache only and SC denotes secondary cache. The MC versions contain special support for cache architectures in multiprocessor systems.
R4400 processors where used in many Silicon Graphics computers, e.g. the Indigo2 workstations, Onyx supercomputers and Challenge servers.
 
References:  MIPS R4400 Product Information  R4400 at SGIstuff
Toshiba TC86R4400MC-200
Toshiba TC86R4400MC-200 Top Side
TC86R4400MC-200
3370 JAPAN
9636YJA
Toshiba TC86R4400MC-200 Back Side
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Core Frequency:200 MHz
Data bus (ext.):64 Bit
Address bus:64 Bit
Transistors:2,300,000
Voltage:3.3 V
Introduced:05/1994
Manufactured:week 36/1996
Made in:Japan
L1 Cache:16+16 KB
Package Type:Ceramic
Goldcap
PGA-447
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