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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:
o   Provides the Bridge between the PCI Bus and ISA Bus
o   100% PCI and ISA Compatible 
    - PCI and ISA Master/Slave Interface 
    - Directly Drives 10 PCI Loads and 6 ISA Slots 
    - Supports PCI at 25 MHz and 33 MHz 
    - Supports ISA from 6 MHz to 8.33 MHz
o   Enhanced DMA Functions
    - Compatible DMA Transfers 
    - 27-Bit Addressability 
    - Seven Independently Programmable Channels 
    - Functionality of Two 82C37A DMA Controllers
o   Integrated Data Buffers to Improve Performance 
    - 8-Byte DMA/ISA Master Line Buffer 
    - 32-Bit Posted Memory Write Buffer to ISA
o   Integrated 16-Bit BIOS Timer 
o   Non-Maskable Interrupts (NMI) 
    - PCI System Errors 
    - ISA Parity Errors
o   Four Dedicated PCI Interrupts 
    - Level Sensitive 
    - Can be Mapped to Any Unused Interrupt
o   Arbitration for ISA Devices
    - ISA Masters
    - DMA and Refresh
o   Arbitration for PCI Devices
    - Six PCI Masters Are Supported
    - Fixed, Rotating, or a Combination of the Two
o   Utility Bus (X-Bus) Peripheral Support
    - Provides Chip Select Decode
    - Controls Lower X-Bus Data Byte Transceiver
o   Integrates the Functionality of One 82C54 Timer
    - System Timer
    - Refresh Request
    - Speaker Tone Output
o   Integrates the Functionality of Two 82C59 Interrupt Controllers
    - 14 Interrupts Supported
    - Edge/Level Selectable Interrupts; Each Interrupt Individually 
      Programmable
o   Complete Support for SL Enhanced Intel486 CPU's
    - SMI# Generation Based on System Hardware Events
    - STPCLK# Generation to Power Down the CPU
o   Integrated I/O Advanced Programmable Interrupt Controller (APIC)


**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
***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...
**
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**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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**SL9025  Address Controller                                    <oct88
***Info:...
***Versions:...
***Features:...
**SL9090  Universal PC/AT Clock Chip                            <oct88...
**SL9250  Page Mode Memory Controller (16/20MHz 8MB Max)        <oct88...
**SL9350  Page Mode Memory Controller (16/20/25MHz 16MB Max)    <oct88...
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