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**82420EX     PCIset (for 486) EX (Aries)   (82425EX/82426EX)   <Dec94
***Notes:...
***Info:...
***Configurations:...
***Features:
o   Host CPU
    - 25-33 MHz Intel486 and OverDrive Processors
    - L1 Write-Back Support
o   Integrated DRAM Controller
    - 1 to 128 MByte Main Memory
    - 70 ns Fast Page Mode DRAM SIMMs Supported
    - Supports 256 KByte, 1 MByte, and 4 MByte Double and Single Sided
      SIMMs
    - Read Page Hit Timing of 3-2-2-2 at 33 MHz
    - Burst Mode PCI Master Accesses 
    - Decoupled Refresh Reduces DRAM Latency
    - Five RAS Lines
o   Integrated L2 Cache Controller
    - Write-Back and Write-Through Cache Policies
    - Direct Mapped Organization
    - 64, 128, 256 or 512 KByte Cache Sizes
    - Programmable Zero Walt-State L2 Cache Read and Write Accesses
    - Two Banks Interleaved or a Single Bank Non-Interleaved Operation
    - No VALID Bit Required
o   25/33 MHz PCI Bus Interface
    - Two Bus Masters
    - PCI Auto Configuration Support
o   Host/PCI Bridge
    - Converts Back-to-Back Sequential Memory Writes to PCI Burst 
      Writes
    - CPU Memory Write Posting to PCI
o   PCI Local Bus IDE Interface
    - Supports Mode 3 Timing
o   Programmable Attribute Map for First 1 MByte of Main Memory
o   100% ISA Compatible
    - Directly Drives 5 ISA Slots
o   Two 8237 DMA Controllers
    - 7 DMA Channels
    - 27-bit Addressability
    - Compatible DMA Transfers
o   One 82C54 Timer/Counter
    - System Timer
    - Refresh Request
    - Speaker Tone
o   Two 82C59 Interrupt Controllers
    - 14 Interrupts
    - Edge/Level Sense Is Programmable per Channel
    - PCI Interrupt Steering for Plug and Play Compatibility
o   X-Bus Peripheral Support
    - RTC, KBC, BIOS Chip Selects
    - Control for Lower X-Bus Transceiver
    - Integrates Mouse Interrupt
    - Coprocessor Error Reporting
o   Non-Maskable Interrupts (NMI)
    - PCI System Errors
    - Main Memory Parity Errors
    - ISA Parity Errors
o   System Power Management (Intel SMM Support)
    - Programmable System Management Interrupt (SMI)-Hardware Events,
      Software Events, EXTSMI#
    - Programmable CPU Clock Control
    - Fast on/off Mode
o   Generates System Clocks
o   160-Pin QFP Package for IB
o   208-Pin QFP Package for PSC


**82430LX     PCIset (Pentium) LX (Mercury) (82433LX/82434LX) 03/22/93...
**82430NX     PCIset (Pentium) NX (Neptune) (82433NX/82434NX)    Mar94...
**82430FX     PCIset (Pentium) FX (Triton I) (82437FX/82438FX)01/31/95...
**82430MX     PCIset (Pentium) MX (Mobile Triton)(82437/438MX)11/01/95...
**82430HX     PCIset (Pentium) HX (Triton II) (82439HX)       02/12/96...
**82430VX     PCIset (Pentium) VX (Triton II) (82437VX/82438) 02/12/96...
**82430TX     PCIset (Pentium) TX (Triton II) (82439TX)       02/17/97...
**82450KX/GX  PCIset (Pentium Pro) KX/GX (Mars/Orion)         11/01/95...
**
**Support Chips:
**82091AA     Advanced Interface Peripheral (AIP)                  c93...
**8289        Bus Arbiter (808x)                                   c79...
**82289       Bus Arbiter for iAPX 286 Processor Family            c83...
**82258       Advanced Direct Memory Access Coprocessor(ADMA) 01/01/84...
**82335       High-Integration Interface Device For 386SX      c:Nov88...
**82360SL     I/O Subsystem                                   10/05/90...
**82370       Integrated System Peripheral (for 82376)         c:Oct88...
**82371FB/SB  PCI ISA IDE Xcelerator 82371FB/82371SB (PIIX/3) 01/31/95...
**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
***Notes:...
***Info:...
***Versions:...
***Features:...
**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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