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Hewlett Packard PA-8200 (Vulcan) processorsIntroduction: May 1997Shortly after the introduction of the PA-8000 the design team noted several aspects of this chip for improvement in the successor: branch prediction, TLB miss rates and Cache sizes. The new chip should offer improved performace, compatibility with existing applications and short time to market. The whole design should be heavily leveraged from the existing PA-8000 design foundation. The availability of new 4Mb SRAMs with faster access times allowed an increased CPU clock-speed and a bigger cache size. Furthermore the team analyzed that the PA-8200 performance could be enhanced significantly if wasted cycles while waiting for instructions and data were reduced. Due to this, it was concluded that increasing the BHT, TLB and caches are high benefit, low risk improvements. PA-8200 was used in C200, C240, D390, J2240, K370, K380, K570, K580, R390, V2200 and V2250.
Source: www.openpa.net |
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