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**Cant find a chip?
Early chip sets have  a title and a part no. to refer  to the chip set
as a  whole. As time went  on the chip  set became one chip,  so later
chip sets are usually referred to by  the part no. on the actual chip.
These are  usually called "Single  Chip" by the  manufacture, although
they nearly  always follow the 2-chip  North/South-bridge paradigm. So
these are referred to by for example, "M1521/M1523" or "M1521/M23" for
short. If there is a part number for  the chip set as a whole that has
precedence. Try the search function for  a chip part no. and hopefully
it will turn up the chip set it was part of.

**Why this document is not GPL or a wiki...
**Definition of a chip set:...
**'chip set', 'chip-set' or 'chipset'?...
**What's not included:...
**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...
**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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...
**HTK320        386DX Chip Set                                 c:Sep91
***Info:...
***Configurations:
HT321-ISA Controller
HT322-Memory Control Unit (MCU)

***Features:
o   2-chip 80386DX PC/AT compatible solution
o   Supports CPU speeds of up to 40MHz
o   3167 Weitek and 80387 co-processor supported
o   Peripherals supported on local CPU bus
o   Port 92 functions
o   Posted backplane memory cycles
Cache
o   Direct mapped or 2-way set associative cache sizes of 32K, 
    64K and 128K
o   Internal tag RAMs
o   Zero wait-state write hits
o   Line burst capability from DRAM to cache
WriteBuffer
o   4 deep, 32-bit wide write buffers
o   Byte gathering
o   Full or partial write buffer hit Support
o   Out of order operation
Memory
o   4-bank DRAM Support
o   256K, 1M, 4M, 16M support (up to 256Mb)
o   Mix and match memory types
o   2/4-way or disabled interleaving and fast paging
o   CAS before RAS, or RAS Only Refresh
o   EMS 4.0 support
o   Single BIOS-ROM support 
o   System and Video BIOS in Single ROM

**HTK340        "Shasta" 486 Chip Set                          c:Jun92...
**Support Chips:
**HT44          Secondary Cache                                c:Jun92...
**Other:...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...