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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
***Notes:...
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**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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**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96
***Info:
The VT82C586A  PIPC (PCI Integrated  Peripheral Controller) is  a high
integration,  high  performance  and  high compatibility  device  that
supports Intel and non-Intel based processor to PCI bus bridge to make
a complete  Microsoft PC97 compliant  PCI/ISA system.  In  addition to
complete  ISA  extension  bus  functionality, the  VT82C586A  includes
standard intelligent peripheral controllers:

a) Master  mode enhanced IDE  controller with dual channel  DMA engine
and  interlaced dual  channel commands.   Dedicated FIFO  coupled with
scatter  and  gather master  mode  operation  allows high  performance
transfers between  PCI and IDE  devices.  In addition to  standard PIO
and  DMA mode  operation,  the VT82C586A  also  supports the  emerging
UltraDMA-33  standard to  allow  reliable data  transfer  rates up  to
33MB/sec  throughput.   The  IDE  controller  is  SFF-8038i  v1.0  and
Microsoft Windows-95 compliant.

b) Universal Serial Bus controller  that is USB v1.0 and Universal HCI
v1.1 compliant.  The VT82C586A includes the root hub with two 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 128  byte extended CMOS.  In  addition to the
standard ISA  RTC functionality, the integrated RTC  also includes the
date alarm and other  enhancements for compatibility with the emerging
ACPI standard.

e)  Notebook-class  power  management  functionality  including  event
monitoring, CPU clock throttling (Intel processor protocol), power and
leakage control, hardware-  and software-based event handling, general
purpose  IO,  chip select  and  external  SMI.   The power  management
function supports legacy APM v1.2.

f) Plug and  Play controller that allows complete  steerability of all
PCI interrupts to any interrupt channel.  Two additional interrupt and
DMA channels are provided to allow plug and play and reconfigurability
of on-board peripherals for Windows 95 compliance.

The  VT82C586A 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-2.1  specification, the  VT82C586A  supports
delayed transactions 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 four levels (doublewords) of
line  buffers from  the PCI  bus  to the  ISA bus  to further  enhance
overall system performance.

***Versions:...
***Features:
o   PC97 Compliant PCI to ISA Bridge
    - Integrated ISA Bus Controller with integrated DMA, timer, and 
      interrupt controller
    - Integrated keyboard controller with PS2 mouse support
    - Integrated DS12885 style real time clock with extended 128 byte 
      CMOS RAM
    - Integrated USB controller with root hub and two function ports
    - Integrated master mode enhanced IDE controller with enhanced PCI 
      bus commands
    - PCI-2.1 compliant with delay transaction
    - Four double-word line buffer between PCI and ISA bus
    - Supports type F DMA transfers
    - Fast reset and Gate A20 operation
    - Edge trigger or level sensitive interrupt
    - Flash EPROM, 2MB EPROM and combined BIOS support
    - Programmable ISA bus clock
o   Inter-operable with Intel and other Host-to-PCI Bridges
    - Combine with VT82C595 for a complete Pentium / PCI / ISA system 
      (Apollo VP2)
    - Combine with VT82C685/687 for a complete Pentium-Pro /PCI / ISA 
      system (Apollo P6)
    - Inter-operable with other Intel or non-Intel Host-to-PCI bridges 
      for a complete PC97 compliant PCI/ISA system
o   Enhanced Master Mode PCI IDE Controller with Extension to 
    UltraDMA-33
    - Dual channel master mode PCI supporting four Enhanced IDE 
      devices
    - Transfer rate up to 22MB/sec to cover PIO mode 4 and multi-word 
      DMA mode 2 drives and beyond
    - Extension to UltraDMA-33 / ATA-33 interface for up to 33MB/sec 
      transfer rate
    - Sixteen levels (doublewords) of prefetch and write buffers
    - Interlaced commands between two channels
    - Bus master programming interface for SFF-8038i rev.1.0 and 
      Windows-95 compliant
    - Full scatter and gather capability
    - Support ATAPI compliant devices
    - Support PCI native and ATA compatibility modes
    - Complete software driver support
o   Universal Serial Bus Controller
    - USB v.1.0 and Intel Universal HCI v.1.1 compatible
    - Eighteen level (doublewords) data FIFO with full scatter and 
      gather capability
    - Root hub and two function ports with integrated physical layer 
      transceivers
    - Legacy keyboard and PS/2 mouse support
o   Sophisticated Power Management
    - Normal, doze, sleep, suspend and conserve modes
    - System event monitoring with two event classes
    - One idle timer, one peripheral timer and one general purpose 
      timer
    - More than ten general purpose input and output ports
    - Seven external event input ports with programmable SMI condition
    - Complete leakage control when external component is in power off 
      state
    - Primary and secondary interrupt differentiation for individual 
      channels
    - Clock stretching, clock throttling and clock stop control
    - Multiple internal and external SMI sources for flexible power 
      management models
    - APM 1.2 compliant
    - Pin-compatible upgrade to VT82C586B for OnNow / ACPI (Advanced 
      Configuration and Power Interface) power-management support, 
      256-byte extended CMOS, Distributed DMA, and I2C capabilities
o   Plug and Play Controller
    - PCI interrupts steerable to any interrupt channel
    - Dual interrupt and DMA channel controllers for on-board plug and 
      play devices
    - Microsoft Windows 95 and plug and play BIOS compliant
o   Built-in Nand-tree pin scan test capability
o   0.5um mixed voltage, high speed and low power CMOS process
o   Single chip 208 pin PQFP

**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
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