http://download.intel.com/design/PentiumIII/datashts/27367305.pdf
It just says: • On-die primary (L1) instruction and data caches — 4-way set associative, 32-byte line size, 1 line per sector — 16-Kbyte instruction cache and 16-Kbyte write-back data cache — Cacheable range controlled by processor programmable registers • On-die second level (L2) cache — 8-way set associative, 32-byte line size, 1 line per sector — Operates at full core speed — 512-Kbyte ECC protected cache data array
Oh does that mean the L1 cache is 16K? That seems so small...