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**82371FB/SB  PCI ISA IDE Xcelerator 82371FB/82371SB (PIIX/3) 01/31/95
***Notes:...
***Info:...
***Versions:...
***Features:
o   Bridge Between the PCI Bus and ISA Bus
o   PCI and ISA Master/Slave Interface
    - PCI from 25-33 MHz
    - ISA from 7.5-8.33 MHz
    - 5 ISA Slots
o   Fast IDE Interface
    - Supports PIO and Bus Master IDE
    - Supports up to Mode 4 Timings
    - Transfer Rates to 22 MB/Sec
    - 8 x 32-Bit Buffer for Bus Master IDE PCI Burst Transfers
    - Separate Master/Slave IDE Mode Support (PIIX3)            
o   Plug-n-Play Port for Motherboard Devices
    - 2 Steerable DMA Channels (PIIX Only)
    - Fast DMA with 4-Byte Buffer (PIIX Only)
    - 2 Steerable Interrupts Lines on the PIIX and 1 Steerable 
      Interrupt Line on the PIIXS
    - 1 Programmable Chip Select
o   Steerable PCI Interrupts for PCI Device Plug-n-Play
o   PCI Specification Revision 2.1 Compliant (PIIX3)
o   Functionality of One 82C54 Timer
    - System Timer; Refresh Request; Speaker Tone Output
o   Two 82C59 Interrupt Controller Functions
    - 14 Interrupts Supported
    - Independently Programmable for Edge/Level Sensitivity
o   Enhanced DMA Functions
    - Two 8237 DMA Controllers
    - Fast Type F DMA
    - Compatible DMA Transfers
    - 7 Independently Programmable Channels
o   X-Bus Peripheral Support
    - Chip Select Decode
    - Controls Lower X-Bus Data Byte Transceiver
o   I/O Advanced Programmable Interrupt Controller (IOAPIC) Support 
    (PIIX3)
o   Universal Serial Bus (USB) Host Controller (PIIX3)
    - Compatible with Universal Host Controller Interface (UHCI)
    - Contains Root Hub with 2 USB Ports
o   System Power Management (Intel SMM Support)
    - Programmable System Management Interrupt (SMI)-Hardware Events,
      Software Events, EXTSMI#
    - Programmable CPU Clock Control (STPCLK#)
    - Fast On/Off Mode
o   Non-Maskable Interrupts (NMI)
    - PCI System Error Reporting
o   NAND Tree for Board-Level ATE Testing
o   208-Pin QFP

**82371MX     Mobile PCI I/O IDE Xcelerator (MPIIX)           11/01/95...
**82371AB     PCI-TO-ISA / IDE Xcelerator 82371AB (PIIX4)     02/17/97...
**82374/82375 PCI-EISA Bridge (82374EB/82375EB, 374SB/375SB)   c:Mar93...
**82378       System I/O (SIO) (82378IB and 82378ZB)           c:Mar93...
**82379AB     System I/O-APIC (SIO.A)                           <Dec94...
**82380       32-bit DMA Controller w/ Integrated Peripherals 02/01/87...
**82380FB/AB  PCIset: 82380FB Mobile PCI-to-PCI Bridge(MPCI2) 02/17/97...
**82384       Clock Generator and Reset Interface                  c86...
**82385       32-bit Cache Controller for 80386               09/29/87...
**82385SX     32-bit Cache Controller for 80386SX             01/25/89...
**82395DX     High Performance Smart Cache                    06/18/90...
**82395SX     Smart Cache                                     12/17/90...
**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:...
***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...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
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*OPTi...
**82C895         System/Power Management Controller (cached)   c:Sep94
***Notes:...
***Info:
Overview
The 82C895 provides a highly integrated solution for fully compatible,
high performance  PC/AT platforms.   This chipset will  support 486SX/
DX/DX2/DX4  and P24T microprocessors  in the  most cost  effective and
power  efficient  designs  available  today.  For  power  users,  this
chipset offers optimum performance for systems running up to 50MHz.

Based  fundamentally  on  OPTi's   proven  82C801  and  82C802  design
architectures,  the 82C895 adds  additional memory  configurations and
extensive  power  management  control  for  the  processor  and  other
motherboard components.

The  820895  supports the  latest  write-back  processor designs  from
Intel, AMD, and Cyrix, as well as supporting the AT bus and VESA local
bus  for   compatibility  and   performance.   It  also   includes  an
82C206-compatible  Integrated Peripherals Controller  (IPC). all  in a
single 208-pin PQFP (Plastic Quad Flat Pack) package for low cost.

2.1 Power Management

This block diagram [see  datasheet] exemplifies the flexibility of the
82C895/82C602 GREEN  strategy.  System designs  can easily accommodate
both SLe  and non-SLe  CPUs. If  an Intel non-SLe  CPU is  used, SMI#,
SMIACT#, and  FLUSH# are no  connects.  One design can  easily accomm-
odate both types of processors with minimal changes for upgrades.

***Configurations:...
***Features:...
**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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