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*_IBM...
*ACC Micro...
*ALD...
*ALi...
*AMD . . . . . . . [no datasheets, some info]...
**AMD 640/645     (Pentium Based on VIA VT82C590) [some info]      c97
640=VT82C595
645=VT82C586B

The  Shuttle  HOT-603 is  the  only  known  motherboard with  the  640
chipset.

There may be another version known  as the 640AGP with AGP support. It
is difficult to determine if this ever existed.

Various sources  state the  AMD 640  is the same  as the  VIA VT82C590
(VP2) chip set. However no first-hand source (datasheet, etc) has been
found. YMMV

**Later Chipsets:...
*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:...
**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...
**950        LPC I/O                                         <07/16/99
***Info:...
***Versions:...
***Features:
o   Low Pin Count Interface
    - Comply with Intel LPC Interface Specification Rev. 1.0 
      (Sept. 29, 1997)
    - Supports Serial IRQ Protocol
    - Supports PCI PME# Interface
o   PC98/PC99, ACPI Compliant
    - PC98 & PC99 compliant
    - Register sets compatible with "Plug and Play ISA Specification 
      Rev. 1.0a"
    - ACPI V. 1.0 compliant
    - Supports 9 logical devices
o   Enhanced Hardware Monitor
    - Built-in 8-bit Analog to Digital Converter
    - 3 thermal inputs from remote thermistors or thermal diode or 
      diode-connected transistor
    - 8 voltage monitor inputs (VBAT is measured internally.)
    - WatchDog comparison of all monitored values
o   Fan Speed Controller
    - Provides Fan ON/OFF and PWM control
    - 3 programmable Pulse Width Modulation (PWM) Fan control outputs
    - Each PWM output supports 128 steps of PWM modes
    - Monitors 3 Fan tachometer inputs
o   Game Port
    - Built-in 558 quad timers and buffer chips
    - Supports direct connection of two joysticks
    - Game port signals are multiplexed with GPIOs
o   Two 16C550 UARTs
    - Supports two standard Serial ports
    - UART1 is dedicated for Serial port
    - UART2 supports  either Serial Port or IrDA 1.0/ASKIR
o   Consumer Remote Control (TV remote) IR with Power-up Feature
o   IEEE 1284 Parallel Port
    - Standard mode -- Bi-directional SPP compliant
    - Enhanced mode -- EPP V. 1.7 and 1.9 compliant
    - High speed mode -- ECP, IEEE 1284 compliant
    - Backdrive current reduction
    - Printer power-on damage reduction
    − Supports POST (Power-On Self Test) Data Port
o   Floppy Disk Controller
    - Supports two 360K/ 720K/ 1.2M/ 1.44M/ 2.88M floppy 
      disk drives
    - Enhanced digital data separator
    - 3-Mode drives supported
    - Supports automatic write protection via software
o   48 General Purpose I/O Pins
    - Input mode supports switch de-bounce
    - SMI is routed through GPIOs
o   Flash ROM Interface
    - Up to 4M bits flash supported
o   Single 24/48 MHz Clock Inputs
o   Single +5V Power Supply
o   128-Pin PQFP

**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...