HP Vectra XU 6/XXX Optimization Manual page 60

Two levels of Integrated
Cache
Level-One Caches
Level-Two Cache
2 Technical Reference
The Intel Pentium Pro Processor
The Pentium Pro processor integrates three cache memories in the
same package: an 8 KB level-one data cache; an 8 KB level-one
instruction cache; and a 256 KB unified level-two cache. The cache level
refers to the proximity of the cache to the processor's pipelines; the
level-one caches are closer to the pipelines than the level-two cache.
The caches are hierarchical, so that any data or instructions stored in
level-one cache memories will also be stored in the level-two cache
memory.
The Pentium Pro's two 8 KB level-one caches are similar to the level-one
caches integrated in the Pentium processor. Both level-one caches use
a two-way set-associative organization, meaning that they consist of
two, separate logical banks of equal size (4 KB each).
The Pentium Pro's 256 KB level-two cache stores both data and
instructions. The level-two cache uses a four-way set-associative
organization (four banks of 64 KB). Set-associative caches offer greater
flexibility for storing data items that have similar memory addresses.
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