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*Read Me/FAQ/General Info...
*_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...
**800 series
***810         (Whitney)       04/26/99...
***810L        (Whitney)       04/26/99...
***810-DC100   (Whitney)       04/26/99...
***810e        (Whitney)       09/27/99...
***810e2       (Whitney)       01/03/01...
***815         (Solano)        06/19/00...
***815e        (Solano-2)      06/19/00...
***815em       (Solano-?)      10/23/00...
***815ep       (Solano-3)      c:Nov'00...
***815p        (Solano-3)      c:Mar'01...
***815g        (Solano-3)      c:Sep'01...
***815eg       (Solano-3)      c:Sep'01...
***820         (Camino)        11/15/99...
***820e        (Camino-2)      06/05/00...
***830M        (Almador)       07/30/01...
***830MP       (Almador)       07/30/01...
***830MG       (Almador)       07/30/01...
***840         (Carmel)        10/25/99...
***845         (Brookdale)     09/10/01...
***845MP       (Brookdale-M)   03/04/02...
***845MZ       (Brookdale-M)   03/04/02...
***845E        (Brookdale-E)   05/20/02...
***845G        (Brookdale-G)   05/20/02...
***845GL       (Brookdale-GL)  05/20/02...
***845GE       (Brookdale-GE)  10/07/02...
***845PE       (Brookdale-PE)  10/07/02...
***845GV       (Brookdale-GV)  10/07/02...
***848P        (Breeds Hill)   c:Aug'03...
***850         (Tehama)        11/20/00...
***850E        (Tehama-E)      05/06/02...
***852GM       (Montara-GM)    01/14/03...
***852GMV      (Montara-GM)    ???...
***852PM       (Montara-GM)    06/11/03...
***852GME      (Montara-GM)    06/11/03...
***854         (?)             04/11/05...
***855GM       (Montara-GM)    03/12/03...
***855GME      (Montara-GM)    03/12/03...
***855PM       (Odem)          03/12/03...
***860         (Colusa)        05/21/01...
***865G        (Springdale)    05/21/03...
***865PE       (Springdale-PE) 05/21/03...
***865P        (Springdale-P)  05/21/03...
***865GV       (Springdale-GV) c:Sep'03...
***875P        (Canterwood)    04/14/03...
*Headland/G2...
**HTK320        386DX Chip Set                                 c:Sep91
***Info:...
***Configurations:...
***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:...