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**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91
***Notes:...
***Info:...
***Features:...
**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...
**
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**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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**82C650/1/2     Discovery (Pentium Pro) [no datasheet]              ?
***Configurations:...
**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...
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*VIA...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98
***Info:
****All:...
****VT82C686B only:...
****All:
                                                             standard.
The  IDE controller  is  SFF-8038i v1.0  and Microsoft  Windows-family
compliant.

b) Universal Serial Bus controller  that is USB v1.1 and Universal HCI
v1.1  compliant.   The  VT82C686A  includes  the root  hub  with  four
function ports  with integrated physical layer  transceivers.  The USB
controller allows hot plug and  play and isochronous peripherals to be
inserted  into   the  system  with  universal   driver  support.   The
controller also  implements legacy keyboard and mouse  support so that
legacy  software can  run transparently  in a  non-USB-aware operating
system environment.

c)  Keyboard controller with PS2 mouse support.

d) Real  Time Clock with 256  byte extended CMOS.  In  addition to the
standard ISA  RTC functionality, the integrated RTC  also includes the
date alarm,  century field,  and other enhancements  for compatibility
with the ACPI standard.

e) Notebook-class  power management functionality  compliant with ACPI
and legacy APM requirements.  Multiple sleep states (power-on suspend,
suspend-to-DRAM,  and  suspend-to-Disk)  are supported  with  hardware
automatic   wake-up.     Additional   functionality   includes   event
monitoring, CPU clock throttling  and stop (Intel processor protocol),
PCI bus clock stop control,  modular power, clock and leakage control,
hardware-based and software-based event handling, general purpose I/O,
chip select and external SMI.

f)  Hardware monitoring  subsystem for  managing system  / motherboard
voltage levels, temperatures, and fan speeds

g)  Full System Management Bus (SMBus) interface.

h) Two 16550-compatible serial  I/O ports with infrared communications
port option on the second port.

i)  Integrated  PCI-mastering   dual  full-duplex  direct-sound  AC97-
link-compatible sound system.  Hardware soundblaster-pro and hardware-
assisted FM blocks are included  for Windows DOS box and real-mode DOS
compatibility.  Loopback capability  is also implemented for directing
mixed  audio streams  into  USB  and 1394  speakers  for high  quality
digital audio.

j)  Two game ports and one MIDI port

k)  ECP/EPP-capable parallel port

l)  Standard floppy disk drive interface

m) Distributed DMA  capability for support of ISA  legacy DMA over the
PCI bus.   Serial IRQ  is also supported  for docking  and non-docking
applications.

n) Plug and  Play controller that allows complete  steerability of all
PCI interrupts and internal interrupts / DMA channels to any interrupt
channel.  One  additional steerable  interrupt channel is  provided to
allow plug and play  and reconfigurability of on-board peripherals for
Windows family compliance.

o)  Internal I/O APIC (Advanced Programmable Interrupt Controller)

The  VT82C686A also  enhances the  functionality of  the  standard ISA
peripherals.  The  integrated interrupt controller  supports both edge
and level triggered interrupts channel by channel.  The integrated DMA
controller supports type F DMA  in addition to standard ISA DMA modes.
Compliant  with  the  PCI-2.2  specification, the  VT82C686A  supports
delayed transactions  and remote power  management so that  slower ISA
peripherals  do  not  block  the  traffic of  the  PCI  bus.   Special
circuitry is  built in to  allow concurrent operation  without causing
dead  lock even  in a  PCI-to-PCI bridge  environment.  The  chip also
includes eight levels  (doublewords) of line buffers from  the PCI bus
to the ISA bus to further enhance overall system performance.

***Versions:...
***Features:...
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