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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
***Notes:...
***Info:
The Intel 82495XP cache controller and 82490XP cache RAM, when coupled
with a user-implemented memory  bus controller, provide a second-level
cache  subsystem  that eliminates  the  memory  latency and  bandwidth
bottleneck for  a wide  range of multiprocessor  systems based  on the
i860 XP  microprocessor. The CPU  interface is optimized to  serve the
i860  XP microprocessor  with zero  wait  states at  up to  50 MHz.  A
secondary cache  built from the  82495XP and 82490XP isolates  the CPU
from  the memory subsystem;  the memory  can run  slower and  follow a
different protocol than the i860 XP microprocessor.
         
***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...
*Headland/G2...
*HMC (Hulon Microelectronics)...
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*Motorola...
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*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset                <04/02/95
***Info:...
***Configurations:...
***Features:...
**5511/5512/5513 Pentium PCI/ISA                             <06/14/95...
**5571           (Trinity) Pentium PCI/ISA Chipset (75MHz)   <12/09/96...
**5581/5582      (Jessie)  Pentium PCI/ISA Chipset (75MHz)   <04/15/97...
**5591/5592/5595 (David)   Pentium PCI A.G.P. Chipset        <01/09/98...
**5596/5513      (Genesis) Pentium PCI Chipset               <03/26/96...
**5597/5598      (Jedi)    Pentium PCI/ISA Chipset           <04/15/97...
**530/5595       (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540            (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x            SoC (System-on-chip)                        <03/14/02...
**
**Support chips:
**85C206     Integrated Peripheral Controller [no datasheet]         ?...
**5595       Pentium PCI System I/O                          <12/24/97...
**950        LPC I/O                                         <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...