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**What's not included:
All  information included  in  this  file can  be  referenced to  some
document or  picture.  Or at least  should be:-) As a  result of this,
proprietary chip sets, and odd combinations of different chip sets are
not  usually  included.   There  tends  to  be  scant  information  on
proprietary chip sets, i.e.  no  datasheet.  Similarly chip sets built
using some components  from one manufacture and some  from another are
kind of difficult to deal with.

An example  I know of  is a  25 MHz 386  DX motherboard that  uses the
Intel N82230/N82231  (formerly, ZyMOS)  286 chip  set, with  an AUStek
cache Controller.   I know it  existed but there is  no documentation.
So the best I can say you'll have  to take my word that it existed.  I
can't include it because there is no real information there.

Also  not  included  is  anything  that  isn't  a  PC-compatible  chip
set.  I.e.  no Macintosh  info.  Any Information  on PC-incompatibles/
pseudo-compatibles, and  other weirdi-type  stuff I have  a particular
interest in.  See  the section: 'Info needed on'.  Some information on
video  chip  sets  is  included,  occasionally but  the  focus  is  on
motherboard implementation.

**Who made the first chip set?...
**Spelling errors/mistyped words...
**Info needed on:...
**A note on VESA support of 486 chipsets....
**Datasheets:...
*_IBM...
*ACC Micro...
*ALD...
*ALi...
*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**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:...
***Configurations:...
***Features:
System 
o   100% PC/AT compatible
o   Supports 3.3V Intel Pentium 75/90/100/120 processors at bus 
    frequencies up to 66MHz
o   Supports Cyrix 6x86 processor

DRAM 
o   Full 64-bit FPM/EDO DRAM controller
    - Supports 2-2-2 EDO pipeline at 66MHz bus speed
    - Supports 5V or 3.3V DRAM with-out buffers
    - Supports up to 512MB
    - Controls up to 6 banks
    - Post write buffer
o   Selectable current drive for DRAM bus 

Cache 
o   L1 Cache supports write-through and write-back modes
o   Power managed L2 Cache
    - 64KB-2MB cache
    - Write-back or write-through modes
    - 2-1-1-1 synchronous cache cycles
    - 3-1-1-1 pipelined synchronous cache cycles
    - Combined tag/dirty SRAM option

ISA/VL/PCI Bus 
o   Integrated PCI bus with operation up to 33MHz; supports up to 
    three masters
o   CLKRUN# support for PCI
o   Distributed DMA support (software-based)
o   100% AT-compatible ISA bus; 3.3V or 5V operation, also supports 
    ISA bus masters
o   VL bus support (slave only)
o   Integrated Local Bus IDE supports four drives, which can be bus 
    masters, modes 4 and 5 supported  

Power Management
o   Advanced Power Management Unit
o   Full CPU System Management Mode (SMM) support
o   Full CPU power control through "clock throttling"
o   Full system clock control, even CPU clock can be stopped during 
    APM doze mode
o   Both hardware and software controlled power management
o   Full peripheral power control
o   13 flexible peripheral timers
o   Sixteen power control pins
o   I/O trapping captures address and data
o   Distributed DMA support (software-based)
o   Full peripheral activity tracking
o   Automatic peripheral power-up/power-down features
o   Full suspend current leakage control
o   36 Power Management Interrupt (PMI) sources
o   Eight external power management interrupt sources
o   Supports SMBASE re-programmability that allows the cache to be
    maintained during system management mode, avoiding cache fills 
    after returning from SMM
o   Proprietary automatic internal pull-up/pull-down resistors 
    activated only when needed to reduce power consumption

Thermal Management
o   Advanced Thermal Management Unit
o   Internal mechanism tracks CPU activity and initiates cool down
    mode before CPU temperature reaches a damaging level
o   External sensor option

Packaging
o   82C556M Data Buffer
    - 176 pin TQFP (0.5mm pin spacing)
o   82C557M System Controller
    - 208 pin TQFP (0.5mm pin spacing)
o   82C558E Peripheral Controller
    - 208 pin TQFP (0.5mm pin spacing)

82C602A RTC/Buffer Companion Chip
o   Integrated Real-Time Clock
o   Based on Benchmark Bq3285
o   256 bytes battery-backed memory
o   Integrates multiplexing/demultiplexing logic, latches, and 
    buffers
o   Eliminates most/all TTL in typical synchronous cache system
o   100 pin TQFP package (0.5mm pin spacing)
o   Also available in 100 pin PQFP
     
**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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