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**82396SX     Smart Cache                                     12/17/90
***Notes:...
***Info:...
***Versions:...
***Features:...
**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...
**82C566/7/8     Viper-Max Chipset Scalable MultiMedia PC Solution   ?
***Info:
Overview

The OPTi  Viper-MAX Chipset provides a highly  integrated solution for
fully compatible, high performance  PC/AT platforms based on the Intel
3.3V  Pentium  Processor, Cyrix  6x86  Processor,  and  AMD K86  Proc-
essor. As the latest member of the Desktop Viper Chipset Family, it is
designed  from its  inception to  be the  highest  performance Pentium
chipset ever.   its feature set can  be scaled to  address entry level
UMA-based system  to high-end non-UMA work stations  and servers.  The
deep  buffers in  the Viper-MAX  minimize system  level  latencies and
maximize through-puts to both DRAM and PCI subsystems.

The chipset  provides 64-bit core  logic, with Unified  Memory Archit-
ecture  (UMA), and  integrated PCI  support, plus  sophisticated power
management  features.  This  highly integrated  approach  supplies the
foundation  for a  cost effective  platform without  compromising per-
formance. Its  feature set  furnishes an array  of control  and status
monitoring options  that are accessed  through a simple  and straight-
forward interface.  All major BIOS vendors  provide extensive software
hooks  that allow  system  designers to  integrate  their own  special
features with minimal effort.

82C566 Data Buffer Controller
The 82C566 performs  the task of buffering the CPU  to the DRAM memory
data path.

o   CPU to memory data buffer
o   CPU to PCI local bus buffer
o   Memory to PCI local bus buffer
o   208-pin PQFP

82C567 System Controller
The 82C567 provides the control  functions for the host CPU interface,
the  64-bit Level-2  (L2)  cache, the  64-bit  DRAM bus,  and the  PCI
interface. The 82C567 controls the  data flow between the CPU bus, the
DRAM bus, the local buses, and the 8/16-bit ISA bus. It interprets and
translates cycles from the CPU, PCI bus master, ISA master, and DMA to
the host  memory, PCI bus slave,  or ISA bus devices.  The 82C567 also
serves  as the UMA  (Unified Memory  Architecture) and  USB (Universal
Serial Bus) protocol interface.

o   3.3V CPU interface
o   DRAM controller
o   L1/L2 cache controller
o   UMA arbiter
o   USB interface
o   PCI interface
o   Arbitration logic
o   Data bus buffer control (memory data bus to and from host data 
    bus)
o   208-pin PQFP

82C568 Integrated Peripherals Controller
The 820568 contains the ISA bus controller and includes an 82C206, RTC
interface, DMA controller, serial interrupt controller and distributed
DMA. It also has a sophisticated system power management unit.

o   ISA bus controller
o   Master mode IDE
o   Type F DMA support
o   Integrated 82C206 IPC
o   System power management functions
o   PCI local bus interface
o   PCI to ISA expansion bridge
o   Serial interrupt controller
o   Distributed DMA
o   Keyboard emulation of A20M# and CPU warm reset
o   Port B and Port 092h Register
o   208-pin POFP

***Configurations:...
***Features:...
**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...
**SL9250   80386SX Page Mode Memory Controller (16/20MHz 8MB)        ?
***Info:...
***Versions:...
***Features:
o   Supports 80386SX based AT Designs.
o   Up to 20 MHz Performance.
o   Enhanced Fast Page Mode DRAM Controller.
o   Supports 8 M byte of On-Board Memory.
o   Shadow RAM Feature.
o   Programmable Wait State Options.
o   Can use 256K or 1 Meg DRAMs or a mix.
o   Supports 100 ns DRAMs at 16 MHz and 80 us at 20 MHz.
o   Selectable Wait State Option for Faster DRAMs.
o   Switchable remapping of 640K - 1 M RAM to the Top of the 
    Address Space.
o   Advanced CMOS Technology.
o   100 pin Flatpack.

**SL9251   80386SX Page Interleave Memory Controller         <04/13/90...
**SL9252   80386SX System and Memory Controller              <06/12/90...
**SL9350   80386DX Page Mode Memory Controller (16-25MHz 16MB)       ?...
**SL9351   80386DX Page Interleave Memory Controller (33MHz)         ?...
**SL9352   80386DX System and Memory Controller              <06/12/90...
**SLXXXX   Other chips...
**
**VT82C470     "Jupiter", Chip Set (w/o cache) 386 [no datasheet]    ?
**VT82C475     "Jupiter", Chip Set (w/cache) 386   [no datasheet]    ?
**VT82C486/2/3 "GMC chipset"            [no datasheet, some info]    ?...
**VT82C495/480 "Venus" Chip Set                    [no datasheet]    ?
**VT82C495/491 ? EISA Chip Set          [no datasheet, some info]  <93...
**VT82C496G    Pluto, Green PC 80486 PCI/VL/ISA System       <05/30/94...
**VT82C530MV   3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M    Apollo Master, Green Pentium/P54C             <06/22/95...
**VT82C580VP   Apollo VP,  Pentium/M1/K5 PCI/ISA System      <02/15/96...
**VT82C580VPX  Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590     Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT  Apollo VP3, Single-Chip for Pentium with AGP  <10/03/97...
**VT82C598MVP  Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501       Apollo MVP4,Single-Chip 66-100MHz & AGP       <11/04/98...
**VT82C680     Apollo P6, Pentium-Pro Chip Set               <08/30/96...
**Support chips:
**VT82C505     Pentium/486 VL to PCI Bridge                  <05/30/94...
**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96...
**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
**Later P-Pro/II/III/Celeron...
**Later AMD...
**Other...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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