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**82379AB     System I/O-APIC (SIO.A)                           <Dec94
***Notes:...
***Info:
The  82379AB System  I/O-APIC  (SIO.A) component  provides the  bridge
between  the PCI  bus  and the  ISA  expansion bus.  The 82379AB  also
integrates many of the common I/O functions found in today's ISA based
PC systems.  The 82379AB  incorporates the logic  for a  PCI interface
(master and  slave), ISA interface (master and  slave), enhanced seven
channel DMA controller  that supports data buffers to  isolate the PCI
bus  from  the  ISA  bus  and  to enhance  performance,  PCI  and  ISA
arbitration, 14 level interrupt controller, a 16-bit BIOS timer, three
programmable timer/counters, and  Non-Maskable Interrupt (NMI) Control
Logic. The 82379AB also provides decode for peripheral devices such as
the  Flash BIOS,  Real Time  Clock, Keyboard/Mouse  Controller, Floppy
Controller, two  Serial Ports,  one Parallel Port,  and IDE  Hard Disk
Drive. The 82379AB supports several Advanced Power Management features
such as  SMI# Interrupt.  The 82379AB  also supports a total  of 6 PCI
Masters,  and  can  support  up  to  4  PCI  Interrupts.  The  82379AB
incorporates an Advanced Programmable Interrupt Controller (APIC) that
communicates with the processor via a dedicated two data bit bus.

***Versions:...
***Features:...
**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:
o   Two-Way, Set Associative, Secondary Cache for i860 XP 
    Microprocessor
o   50 MHz "No Glue" Interface with CPU
o   Configurable
    - Cache Size 256 or 512 Kbytes
    - Line Width 32, 64 or 128 Bytes
    - Memory Bus Width 64 or 128 Bits
o   Dual-Ported Structure Permits Simultaneous Operations on CPU and
    Memory Buses
o   Efficient MRU Way Prediction
    - Zero Wait States on MRU Hit
    - One Walt State on MRU Miss
o   Dynamically Selectable Update Policies
    - Write-Through
    - Write-Once
    - Write-Back
o   MESI Cache Consistency Protocol
o   Hardware Cache Snooping
o   Maintains Consistency with Primary Cache via Inclusion Principle
o   Flexible User-Implemented Memory Interface Enables Wide Range of
    Product Differentiation
    - Clocked or Strobed
    - Synchronous or Asynchronous
    - Plpelining
    - Memory Bus Protocol
o   82495XP Cache Controller Available in 208-Lead Ceramic Pin Grid 
    Array Package
o   82490XP Cache RAM Available in 84-Lead Plastic Quad Flatpack 
    Package

**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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**82C802G/GP     System/Power Management Controller (cached)      c:93
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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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