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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...
**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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**82C546/547     Python PTM3V                                     c:94
***Notes:...
***Info:...
***Configurations:...
***Features:
o   100% PC/AT compatible
o   Fully supports the 3.3V/5.0V Pentium processors
o   Three chip solution:
    - 82C547 System Controller (SYSC) (160-pin PQFP)
    - 82C546 AT Bus Controller (ATC) (208-pin PQFP)
    - 82C206 Integrated Peripheral Controller (IPC) (84-pin PLLC 
      or 100-pin PQFP)
o   Two buffer/translator support chips:
    - 82C606A (100-pin PQFP)
    - 82C606B (100-pin PQFP)
o   Supports Pentium CPU address pipelining
o   1X clock source, supporting systems running Pentium processor 
    bus clocks up to 60MHz
o   Write-back, direct-mapped cache with size selections:
    64KB, 128KB, 256KB, 512KB, 1MB and 2MB
o   Programmable cache write policy: write-back or write-through
o   Fully programmable cache and DRAM read/write cycles
o   Supports 3-2-2-2 cache burst read cycles at 60MHz
o   Built-in tag auto-invalidation circuitry
o   Support for two programmable non-cacheable memory regions
o   Options for cacheable, write-protected, system and video BIOS
o   Supports two banks of 64-bit wide DRAMs with 256KB, 512KB, 1MB
    2MB, 4MB and 8MBx36 Page Mode
o   Supports DRAM configurations up to 128MB
o   Supports 3-3-3-3 pipeline DRAM burst cycles
o   DRAM post write buffer
o   Support for flash ROM
o   Shadow RAM option
o   Hidden refresh with CAS-before-RAS refresh supported
o   High-performance 32-bit local bus support
o   Performance-oriented snoop-line comparator for VL/ISA
    bus masters
o   External DMA page register
o   Turbo/slow speed selection
o   Asynchronous CPU and VL bus interface
o   AT bus clock speed programmability
o   Transparent 8042 emulation for Fast CPU Reset and GATEA20 
    generation
o   Supports Ports 92h, Gate A20, and Fast Reset
o   Mixed voltage (3.3V and 5.0V), low-power, high speed, 0.8
    micron CMOS technology

**82C556/7/8     Viper [no datasheet]                                ?...
**82C556/7/8N    Viper-N  Viper Notebook Chipset             <05/25/95...
**82C556M/7M/8E  Viper-N+ Viper Notebook Chipset                  c:96...
**82C566/7/8     Viper-Max Chipset Scalable MultiMedia PC Solution   ?...
**82C571/572     486/Pentium                                      c:93...
**82C576/7/8     Viper Xpress  [no datasheet]                        ?...
**82C576/8/9     Viper XPress+ [no datasheet, some info]     <01/16/97...
**82C596/597     PTMAWB Pentium Adaptive Write-back (Cobra)       c:93...
**82C650/1/2     Discovery (Pentium Pro) [no datasheet]              ?...
**82C681/2/6/7   386/486WB EISA                                   c:92...
**82C683         386/486AWB EISA [no datasheet]                      ?...
**82C693/6/7     Pentium uP Write Back Cache EISA                 c:93...
**82C700         FireStar                                         c:97...
**82C701         FireStar Plus                                    c:97...
**82C750         Vendetta      [no datasheet]                        ?...
**82c801         SCWB2 DX Single Chip Solution                    c:92...
**82C802         SCWB2 PC/AT Single Chip [no datasheet]              ?...
**82C802G/GP     System/Power Management Controller (cached)      c:93...
**82C895         System/Power Management Controller (cached)   c:Sep94...
**82C898         System/Power Management Controller (non-cache)c:Nov94...
**
**Support Chips:
**82C601/2       Buffer Devices                                 <Nov94...
**82C822         PCIB (VLB-to-PCI bridge)                         c:94...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
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