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*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]...
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*Forex . . . . . . [List only, no datasheets found]...
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**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...
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**UM82152      Cache Controller (AUStek A38152 clone)              <91
***Info:...
***Versions:...
***Features:
o   Controls 32-kB, 4-way, set-associative cache
o   Available in 16-MHz, 20-MHz, and 25-MHz speeds
o   Direct interface to the 80386
o   Direct interface to industry-standard 8K x 8 SRAMs:
    45 ns for 16-MHz systems
    35 ns for 20-MHz systems
    25 ns for 25-MHz systems
o   Full 32-bit addressability for 4-GB memory support
o   Cache coherency support
o   Software cache invalidation
o   On-chip programmable noncached regions
o   Write buffer support
o   Gate A20 support
o   1.5 micron CMOS technology
o   84-lead PLCC, JEDEC standard package
o   Pin and functionally identical to A38152*

>*A38152 is Austek's cache controller for 25 MHz 386 AT system.
**UM82C852     Multi I/O For XT                                    <91...
**UM82C206     Integrated Peripheral Controller                    <91...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
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