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Intel Pentium processor - The ChipList 2
The ChipList, by Adrian Offerman; The Processor Portal

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0.0  Intel Pentium processor

Generation


Generation: P5.

Compatibility


2-issue 5-stage superscalar with 8-stage pipelined FPU (Floating Point Unit).
Intel i80486 CPU upward instruction compatible.

System Management Mode (SMM).

Cache


8 kbyte instruction cache, 8 kbyte data cache (Harvard architecture).
Both 2-way set-associative, write-back, no write-allocate.

Architecture


Branch prediction (BTB: Branch Target Buffer).

32 bit internal data bus (CPU - MMU (Memory Management Unit, including cache))
64 bit external data bus (MMU, including cache - memory).
Separate address space for instructions and data (Harvard architecture).

Parity checking at busses.

Multi-processing


Multi-processor support.
Upgrading: adding another Intel Pentium CPU.

Marking


  • processor type, clock speed:
    • A80502133: 133 MHz Pentium,
  • stepping and quality:
    • SY022/SSS:
      • SY022: lithography mask number:
        • s-spec (part characteristics): SK, SU, SX, SY, SZ,
      • S: Standard voltage (3.135 - 3.6 V), V (VRE): narrowed voltages 3.4 - 3.6 V,
      • S: Standard timing, M: Minimum Valid MD timing,
      • S: Standard configuration, U: Uniprocessor only,
  • embossed iPP mark: carried by all Pentium CPUs at 90 MHz and faster, most 75 MHz Pentium CPUs carry only the i75 mark, 90 MHz and faster Pentium CPUs with the i75 mark are most likely fake,
  • iCOMP index,
  • serial number:
    • 6044482-0591: number and serial number,
  • country of manufacture:
    • MALAY: Malayasia.

Bug


FDIV bug: In October 1994, Dr. Thomas R. Nicely, then Professor of Mathematics at the Lynchburg College, Lynchburg, Virginia, reported a bug present in the FPU of all Intel Pentium CPUs. The double precision part of the mantissa is not computed correctly when dividing in some areas of the mantissa space of the divisor. The bug is fixed in Intel Pentium CPUs produced after November 1994.


0.0.1  Intel Pentium P5 processor

Identification


Model name: Pentium P5.
Supplier: Intel.
Component class: CPU.

Clock speed


Clock speed Model Performance Voltage Power dissipation Packaging Introduction
60 MHz Intel Pentium 510\60 CPU iCOMP 510 5 V 17-13 W 273 pin PGA March 1993
66 MHz 1 Intel Pentium 567\66 CPU iCOMP 567,
64.5 SPECint92,
56.9 SPECfp92
5 V 16-13 W 273 pin PGA March 1993

  1. First 66 MHz CPUs had heat troubles and were released as 60 MHz items.

Physics


Manufacturing technology: biCMOS.
Manufacturing process: 0.8 micron biCMOS.

Number of transistors: 3.1E6.

Die size: 18 x 16 mm.

Packaging: Socket 4.

Marking


  • 60 MHz: 80500.
  • 60, 66 MHz: 80501.

ID


Step level DH register DL register
Ax 0x05 (family ID) 0x0X (model ID, revision)
B1 0x05 (family ID) 0x13 (model ID, revision)
C1 0x05 (family ID) 0x15 (model ID, revision)
D1 0x05 (family ID) 0x17 (model ID, revision)

CPUID32


Family Model Stepping
0x5 0 Ax
0x5 1 Bx

Bug


Model 1, revision 7: FDIV bug fixed.

0.0.2  Intel Pentium P54C processor

Identification


Model name: Pentium P54C.
Supplier: Intel.
Component class: CPU.

Clock speed


Clock speed Model Performance Periphery Voltage Packaging Introduction Announcement
50/75 MHz Intel Pentium 610\75 CPU iCOMP 610 notebooks: P54T 3.3 V 320 pin TCP October 1994 August 1994
60/90 MHz Intel Pentium 735\90 CPU iCOMP 735   3.3 V 296 pin PGA March 1994  
66/100 MHz Intel Pentium 815\100 CPU iCOMP 815   3.3 V 296 pin PGA March 1994  

Upgrading


  • Intel Pentium P54M OverDrive processor (2 CPUs co-operating),
  • Intel Pentium P54CT CPU.

Physics


Manufacturing technology: biCMOS.
Manufacturing process: 4-layer metal, 0.6 micron biCMOS.

Number of transistors: 3.1E6.

Die size: 12 x 13 mm.

Packaging: Socket 5.

Clock speed


Clock speed Model Code name Multi-processing Performance Voltage Packaging Introduction Marking
60/120 MHz Intel Pentium 1000\120 CPU Pentium P54CQS no multi-processor features iCOMP 1000 3.3 V 296 pin PGA March 1995 step level C2

Physics


Manufacturing technology: .
Manufacturing process: 0.35 micron CMOS.

Number of transistors: 3.1E6.

Die size: 90 mm2.

Packaging: Socket 5.

Identification


Model name: Pentium P54CS.
Supplier: Intel.
Component class: CPU.

Multiplier


The multiplier can be 1.5, 2, 2.5, or 3.

Clock speed


Clock speed Model Performance Voltage Packaging Introduction
66/133 MHz Intel Pentium 1110\133 CPU iCOMP 1110 3.3 V 296 pin PGA June 1995
60/150 MHz Intel Pentium 1195\150 CPU iCOMP 1195 3.3 V 296 pin PGA January 1996
60/166 MHz Intel Pentium 1340\166 CPU iCOMP 1340 3.3 V 296 pin PGA January 1996
66/200 MHz Intel CPU   3.3 V 296 pin PGA June 1996

Physics


Manufacturing technology: .
Manufacturing process: 0.35 micron CMOS.

Number of transistors: 3.1E6.

Die size: 90 mm2.

Packaging: Socket 7.

Marking


  • 60, 66 MHz: 80501.
  • 50/75, 60/90, 66/100, 60/120, 66/133 MHz: 80502.

ID


Code name Step level DH register DL register
  A 0x05 (family ID) 0x2X (model ID, revision)
  B1 0x05 (family ID) 0x21 (model ID, revision)
  B3 0x05 (family ID) 0x22 (model ID, revision)
  B5 0x05 (family ID) 0x24 (model ID, revision)
  C1 0x05 (family ID) 0x25 (model ID, revision)
  C2 (120 MHz) 0x05 (family ID) 0x25 (model ID, revision)
P54CQS, 120 MHz   0x05 (family ID) 0x25 (model ID, revision)
P54LM, 2.9 V Ax 0x05 (family ID) 0x25 (model ID, revision)

CPUID32


Family Model
0x5 0x2

Bug


Model 2, revision 5: FDIV bug fixed.

Compatibility


Embedded Processor Module:

  • EMBMOD133: 66/133 MHz Pentium with 82430HX PCIset.

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