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**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91...
**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93
***Notes:...
***Info:...
***Configurations:...
***Features:
o   High Performance Second Level Cache
    - Zero Walt States at 66 MHz
    - Two-way Set Associative
    - Write-Back with MESI Protocol
    - Concurrent CPU Bus and Memory Bus Operation
    - Boundary Scan
o   Pentium Processor
    - Chip Set Version of Pentium Processor
    - Superscalar Architecture
    - Enhanced Floating Point
    - On-chip SK Code and SK Data Caches
    - See Pentium Processor User's Manual Volume 2 for more 
      Information
o   Highly Flexible
    - 256K to 512K with parity
    - 32, 64, or 128-Bit Wide Memory Bus
    - Synchronous, Asynchronous, and Strobed Memory Bus Operation
    - Selectable Bus Widths, Line Sizes, Transfers, and Burst Orders
o   Full Multiprocessing Support 
    - Concurrent CPU, Memory Bus, and Snoop Operations
    - Complete MESI Protocol
    - Internal/External Parity Generation/Checking
    - Supports Read-for Ownership, Write-Allocation, and Cache-to-
      Cache Transfers

**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
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*OPTi...
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*Unresearched:...
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*Western Digital...
**FE5300        CPU Core Logic for PS/2 Model 50/60 Compatibles   c:87
***Notes:...
***Info:...
***Configurations:...
***Features:...
**FE5400        CPU Core Logic for PS/2 Model 50/60 Compatibles   c:87...
**FE6500        CPU Core Logic for PS/2 Model 70/80 Compatibles   c:88...
**WD6400SX/LP   CPU Core Logic for PS/2 386SX Compatibles          <90...
**WD6500        CPU Core Logic for PS/2 386DX/486 Compatible       <90...
**WD7600A/LP/LV System Chip Set for 80286 or 80386SX         <11/25/91...
**WD7700/LP     System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD7855        System controller for 80386SX                <09/25/92...
**WD7900/LP/LV  System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD8110        System controller for 80386DX/486            <11/30/93...
**
**Support Chips:
**WD76C20x   Floppy, RTC, IDE and Support Logic Device       <11/25/91...
**WD76C30x   Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91...
**WD7615     Desktop Buffer Manager                          <04/15/92...
**WD7625     Desktop Buffer Manager                          <10/01/92...
**WD8120LV   Super I/O [no datasheet]                                ?
**Other Chips:...
*Winbond...
*ZyMOS...
*General Sources:...