Intel Pentium 100 Engineering sample (A8050266-100)
Logs
dateType
Processor
486Family
cpuPackage
Socket 5 (PGA320)
Not linked to any boards or cards.
tag Also known as
Microarchitecture
CPUID 521 (B1),522 (B3),524 (B5),525 (C2),526 (E0),52B (cB1),52C (cC0)
L1 cache 8KB code, 8KB data
Process node 600/350nm
Core P54C
Bus speed 66MHz
Frequency 100MHz
Multiplier 1.5x
Power
Voltage 3.3V
doc No chip documents available
notes Notes

Has a unique part number, unlike normal Pentium 100 chips.

This processor suffers from the Intel FDIV bug.

drv No drivers available
wrench Known issues
  • Engineering Sample

This is an engineering sample, not a final product, for testing and evaluation.

  1. Compatibility: Limited compatibility with hardware, software, or peripherals.
  2. Stability: Potential for crashes, freezes, or unexpected behavior.
  3. Performance: Differences in memory bandwidth, data transfer rates, or overall system performance.
  4. Feature Limitations: Missing or incomplete features compared to the final product.
  5. Engineering Features: Additional options or settings not found in commercial versions.
  • Intel FDIV Bug

Some revisions/steppings of this processor suffers from the infamous Intel FDIV bug, a hardware bug affecting the FPU of the early Intel Pentium processors. Because of the bug, the processor would return incorrect binary floating point results when dividing certain pairs of high-precision numbers.

Last updated 2025-09-02T13:08:23Z
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