PA-RISC information - since 1999

PA-RISC Processors

PA-8500 (PCX-W) processor


The PA-8500 64-bit PA-RISC processor is the direct evolution of the PA-8000 and PA-8200 processors, leveraging their processing core but implementing large on-die L1 caches. Introduced in September 1998, the PA-8500 marked a break with the long-standing HP tradition of keeping large L1 caches off-chip. (The two years older PA-7300LC also included on-chip L1 caches, albeit much smaller). There were no other significant changes to the processing core, besides small increases to the TLB and BHT.


Used in


HP Pumps Up PA-8x00 Family ( mirror)
Linley Gwennap (October 1994: Microprocessor Report, Volume 10 Number 14). [Article reprint for vanished]
A 500  MHz 1.5  MByte Cache with On-Chip CPU (PDF, 141 KB)
Jonathan Lachman and J. Michael Hill (1997: ISSCC).
PA-8500: The Continuing Evolution of the PA-8000 Family ( mirror)
Gregg Lesartre and Doug Hunt (1997: Proceedings of CompCon, IEEE CS Press). [Article reprint for vanished]

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