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**82395SX     Smart Cache                                     12/17/90
***Notes:...
**82396SX     Smart Cache                                     12/17/90...
**82485       Turbo Cache (and 485Turbocache)                      c90...
**82489DX       Advanced Programmable Interrupt Controller    10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91...
**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...
**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...
*Motorola...
*OPTi...
**82C291         SXWB PC/AT Chipset  (386SX)                      c:91
***Info:
The  OPTi  SXWB  provides  a  highly  integrated  solution  for  fully
compatible, high-performance PC/AT platforms.  Since the chipset is so
critical to  the performance and cost  structure of a  PC, this highly
integrated approach provides the  foundation for a very cost effective
platform  without  compromising  performance.   Together  with  OPTi’s
82C206  Integrated  Peripherals Controller  (IPC),  this silicon  will
support the Intel/AMD 386SX  and Cyrix CX486SLC microprocessors in the
most cost effective and power efficient designs available today.  This
chipset offers  optimum next generation performance  for 386SX systems
running up to  33MHz. The OPTi SXWB solution  provides the performance
benefits of  a 32-bit programming  architecture with the  cost savings
associated  with  16-bit  hardware  systems.  The  OPTi  SXWB  chipset
provides a  solution positioned  to deliver value,  without neglecting
quality, compatibility, or reliability.

The  82C291 integrates  a write-back  cache controller,  a  local DRAM
controller, the CPU state machine,  the AT bus state machine, and data
buffers all in a single 160-pin Plastic Quad Flat Pack (PQFP). On-chip
hardware provides the hooks for local bus device support.


***Configurations:...
***Features:...
**82C295         SLCWB PC/AT Chipset (386SX)                         ?...
**82C381/382     HiD/386             (386DX)                      c:89...
**82C391/392     386WB PC/AT Chipset (386DX)                    <Dec90...
**82C461/462     Notebook PC/AT chipset [no datasheet]               ?...
**82c463         SCNB Single Ship Notebook                        c:92...
**82c465MV/A/B   Single-Chip Mixed Voltage Notebook Solution    <Oct97...
**82C481?/482?   HiP/486 & HiB/486 [no datasheet]                Oct89...
**82C491/392     486WB PC/AT Chipset                         <04/21/91...
**82C493/392     486SXWB                                     <10/21/91...
**82C495SX/392SX LCWB PC/AT chipset [no datasheet]                   ?...
**82C495SLC      DXSLC 386/486 Low Cost Write Back                c:92...
**82C495XLC      PC/AT Chip Set                                   c:93...
**82c496A/B      DXBB PC/AT Chipset                             <Mar92...
**82C496/7       DXBB PC/AT Chipset (Cached)                 <01/16/92
***Info:...
***Configurations:...
***Features:
o   386 and 486 CPU interface
o   Isolates the CPU bus from Local bus, more reliable system
    operation at high speed
o   Asynchronous handshaking between CPU bus and Local bus; fixed 
    base-board speed with upgradeable CPU card speed
o   Direct map write back cache with one level write buffer and
    16-byte line size
o   Programmable 2-1-1-1, 3-1-1-1, 2-2-2-2 or 3-2-2-2 burst read cycle
o   Programmable cache write hit 0 or 0 wait state
o   Optional Dirty bit
o   Supports 32K - 256K cache size for 386 cache system
o   Supports 64K - 512K cache size for 486 cache system
o   Provides TAG and Dirty RAM test capability
o   Built-in TAG auto-invalidation circuitry
o   Two programmable non-cacheable regions
o   Option for write-protected, cacheable Video BIOS
o   Cacheable AT bus memory space
o   8042 emulation for fast CPU-reset and gate A20 generation
o   1X clock source support for systems from 16 MHZ to 50 MHZ
o   160-pin plastic quad flat package

**82C498         DXWB PC/AT chipset [no datasheet]                   ?...
**82C499         DXSC DX System Controller                        c:93...
**82C546/547     Python PTM3V                                     c:94...
**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...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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