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**Quote style:
To avoid  thousands of quote marks  and colliding with quote  marks in
the  text, I  have used  a modified  quotation style.   Anything in  a
section  titled "Info:"  or "Features:"  is a  quote from  a datasheet
unless otherwised stated in that  section.  In these sections anything
inside  [] is  an  annotation and  not part  of  the datasheet  unless
otherwise stated in that section.

Under any other section, the text is my own unless indicated with "".

Also  this document  does not  contain the  entire datasheet  for each
chip, usually only the first few pages are included to give an outline
of it. Some datasheets are 100s of pages other are only 1.

**Cant find a chip?...
**Why this document is not GPL or a wiki...
**Definition of a chip set:...
**'chip set', 'chip-set' or 'chipset'?...
**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...
**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...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
**UM82C206     Integrated Peripheral Controller                    <91
***Info:
The UM82C206  Integrated Peripheral  controller includes two  8237 DMA
controllers, two  8259 Interrupt controllers, one  8254 Timer/Counter,
one MC146818 compatible  Real Time Clock, an additional  64 bytes CMOS
RAM,  one  74LS612   memory  mapper,  and  some   top  level  decoder/
configuration logic circuits.  It is a single chip  integration of all
main peripheral  parts attached  to the X  bus of  PC/AT architecture.
While  providing  full  compatibility  with  PC/AT  architecture,  the
UM82C206  also  offers  some  enhanced  features  and  improved  speed
performance. These  include an additional  64 bytes of  user definable
CMOS RAM in real time clock  and drastically reduced recovery time for
the 8237, 8259  and 8254.  Programmable wait state  option is provided
for the DME  cycles and CPU I/O cycles accessing  this chip. This chip
also  provides programmable  8  or  4 MHz  DMA  clock selection.   The
UM82C206 is implemented using advanced 1.5u CMOS design technology and
is packaged in an 84-pin PLCC.

***Versions:...
***Features:...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...