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**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91
***Notes:...
***Info:...
***Features:
o   Two-Way, Set Associative, Secondary Cache for i860 XP 
    Microprocessor
o   50 MHz "No Glue" Interface with CPU
o   Configurable
    - Cache Size 256 or 512 Kbytes
    - Line Width 32, 64 or 128 Bytes
    - Memory Bus Width 64 or 128 Bits
o   Dual-Ported Structure Permits Simultaneous Operations on CPU and
    Memory Buses
o   Efficient MRU Way Prediction
    - Zero Wait States on MRU Hit
    - One Walt State on MRU Miss
o   Dynamically Selectable Update Policies
    - Write-Through
    - Write-Once
    - Write-Back
o   MESI Cache Consistency Protocol
o   Hardware Cache Snooping
o   Maintains Consistency with Primary Cache via Inclusion Principle
o   Flexible User-Implemented Memory Interface Enables Wide Range of
    Product Differentiation
    - Clocked or Strobed
    - Synchronous or Asynchronous
    - Plpelining
    - Memory Bus Protocol
o   82495XP Cache Controller Available in 208-Lead Ceramic Pin Grid 
    Array Package
o   82490XP Cache RAM Available in 84-Lead Plastic Quad Flatpack 
    Package

**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**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...
*HMC (Hulon Microelectronics)...
*Logicstar...
**Other:
SL7001 MDA Graphics Controller
SL5001 Parallel Printer Port Interface
SL2002 Dual Channel NRZI Encoder / Decoder
SL4000 Lan controller

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*Unresearched:...
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**Video: 
VL16160 "RASTER OP" Graphics Boolean Operation ALU. BITBLT  
VL68C45R/S-23 2Mhz Bus 3MHz Character  CMOS CRT Controller.  
VL68C45R/S-35 3Mhz Bus 5MHz Character  CMOS CRT Controller.  
VL68C45R/S-36 3Mhz Bus 6MHz Character  CMOS CRT Controller.  
VL68C45R/S-38 3Mhz Bus 8MHz Character  CMOS CRT Controller.  
VL82C037 VGA 256K 800x600, 16 colors EGA/CGA/MDA compatible
VL82C164 Quad Raster op ALU
VL82C976 Desktop RISC Graphics Accelerator

**Disk:...
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**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
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*General Sources:...