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**82379AB     System I/O-APIC (SIO.A)                           <Dec94
***Notes:...
***Info:...
***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...
**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...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99
Chips:         
Memory Access Controller (MAC)  
Data Interface Buffer (DIB)
CPUs:          8x P-III Xeon Oct
DRAM Types:    SDRAM PC100 2-way Interleave dual channel
Max Mem:       32GB
ECC/Parity:    ECC
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3 PCI-66/64



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