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**82489DX       Advanced Programmable Interrupt Controller    10/12/92
***Notes:...
***Info:...
***Versions:...
***Features:...
**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...
**82C556M/7M/8E  Viper-N+ Viper Notebook Chipset                  c:96
***Notes:...
***Info:
The OPTi Viper-N+ chipset is the leading solution for PCI-based mobile
applications.   Viper-N+  features   leading  edge   power  management
capability and  flexibility for Intel Pentium  75/90/100/120 and Cyrix
6x86 processor based  notebooks. The chipset incorporates desktop-like
performance features  such as L1 and  L2 cache support,  a full 64-bit
DRAM  controller  and  an  integrated  PCI  controller,  in  a  highly
integrated three chip set.

In  terms of  advanced  power  management, no  chipset  offers a  more
effective, comprehensive or flexible feature set, allowing for maximum
performance  with  minimum  power  consumption  for  extended  battery
life. In  fact, for typical applications,  Viper-N+'s power management
unit reduces power consumption by as much as 80%.

Viper-N+ offers the highest level  of system integration, enabling the
lowest  system  cost  and  real  estate  requirement  for  Pentium-PCI
notebooks.  A system without TTL is achievable with synchronous cache.
And, PCI  offers easy  upgradability to emerging  standard interfaces,
such  as  PCMCIA/CardBus  and  PCI  docking  stations.  Viper-N+  also
features an integrated local bus IDE  controller to avoid ISA data bus
bottlenecks.

OPTi coupled  its expertise in mobile technology  and PCI-based design
to create its second generation  64-bit CPU mobile chipset. The result
is  Viper-N+,  enabling  the  highest levels  of  performance,  system
integration  and  power management  capability  available for  Pentium
PCI-based mobile systems.

***Configurations:...
***Features:...
**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
***Notes:
The information in this entry is from the brochure, not a datasheet.

This chipset is designed for  Pentium 60/66Mhz system with an EISA bus
the datasheet  does not mention support  for VESA local  or PCI buses.
But  every other  source found  states it  supports VLB.  It  may also
support dual CPUs.

***info:...
***Configurations:...
***Features:...
**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...
**5591/5592/5595 (David)   Pentium PCI A.G.P. Chipset        <01/09/98
***Info:...
***Configurations:...
***Features:...
**5596/5513      (Genesis) Pentium PCI Chipset               <03/26/96...
**5597/5598      (Jedi)    Pentium PCI/ISA Chipset           <04/15/97...
**530/5595       (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540            (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x            SoC (System-on-chip)                        <03/14/02...
**
**Support chips:
**85C206     Integrated Peripheral Controller [no datasheet]         ?...
**5595       Pentium PCI System I/O                          <12/24/97...
**950        LPC I/O                                         <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...