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**IBM PC/XT/AT Chip Sets
***Datasheets:...
***Read Me:
This section, IBM PC/XT/AT "Chip Sets",  is very long and detailed. It
is  perhaps over  detailed. However  all  other chips  listed in  this
document are derived from these chips.  Besides if you're reading this
document, details may interest you:-)

If  you  just  want to  get  to  info  on  the chips,  choose  section
6. Reading ***Summary of sections, will help.

***Overview (History):...
***Summary of sections:...
***§1: Intel MCS-8x/iAPX Microprocessor families:...
***§2: Intel Chip Specifications 1975 - Jan 1982:...
***§3: IBM PC/XT: Original system chips: ...
***§4: Intel Chip Specifications Jan 1982 - Jan? 1984...
***§5: IBM AT: Original system chips:...
***§6: Intel Chip Specifications Jan? 1984 - 1989...
**82230/82231 High Integration AT-Compatible Chip Set(ZyMOS)   c:Aug88...
**82310       Micro Channel Compatible Peripheral Chip Set    04/21/88...
**82311       High Integration MCA Compatible Perip. Chip Set 11/14/88...
**82320       MCA compatible Chipset           [no datasheet] 04/10/89...
**82340DX     Chip Set (VLSI) (82346/82345/82355)             01/08/90...
**82340SX     Chip Set (VLSI) (82343/82344)                   01/25/89...
**82350       EISA Chip Set                                   07/10/89...
**82350DT     EISA Chip Set                                   04/22/91...
**82420TX/ZX  PCIset (for 486) TX (Saturn), ZX (Saturn II)     c:Nov92...
**82420EX     PCIset (for 486) EX (Aries)   (82425EX/82426EX)   <Dec94...
**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...
**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
***Notes:...
***Info:...
***Versions:...
***Features:...
**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...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**5591/5592/5595 (David)   Pentium PCI A.G.P. Chipset        <01/09/98
***Info:...
***Configurations:...
***Features:
o   Support Intel/AMD/Cyrix Pentium CPU and Other Compatible CPU 
    Host Bus at 60/66 MHz and 3.3V Bus Interface
    − Support the Pipelined Address of Pentium compatible CPU
    − Support the Linear Address Mode of Cyrix CPU
o   Support the Pipelined Address Mode of Pentium CPU
o   Fully Compliant to A.G.P. Revision 1.0 Specification
o   Meet PC97 Requirements
o   Supports PCI Revision 2.1 Specification
o   Integrated Second Level (L2) Cache Controller
    - Write Back Cache Mode
    - Support L2 Cache Flushing for entire L2 cache or specific 
      4K page
    - 8 bits or 7 bits Tag with Direct Mapped Cache Organization
    - Integrated 32K bits Dirty SRAM
    - Integrated 32K bits Invalid SRAM
    - Support Pipelined Burst SRAM
    - Support 256K/512K/1MBytes Cache Sizes
    - Cache Hit Read/Write Cycle of 3-1-1-1
    - Cache Back-to-Back Read/Write Cycle of 3-1-1-1-1-1-1-1
    - Support Single Read Allocation for L2 Cache
    - Support Concurrency of CPU to L2 cache and A.G.P. master to 
      DRAM accesses
o   Integrated DRAM Controller
    - Support 6 RAS Lines for FPM/EDO/SDRAM DIMMs/SIMMs
    - Support 2Mbytes to 768Mbytes of main memory
    - Support Cacheable DRAM Sizes up to 256 MBytes.
    - Support 256K/512K/1M/2M/4M/8M/16Mx N FPM/EDO/SDRAM DRAM
    - Support 64 Mb DRAM Technology
    - Support Parity Checker or ECC Function
    - Support 3.3V or 5V DRAM
    - Supports Symmetrical and Asymmetrical DRAM
    - Support Concurrent Write Back
    - Support CAS before RAS Refresh, Self Refresh
    - Support Relocation of System Management Memory
    - Programmable CAS#, RAS#, RAMWE# and MA Driving Current
    - Fully Configurable for the Characteristic of Shadow RAM (640 
      KBytes to 1 MBytes)
    - Support FPM DRAM 5/6-3-3-3(-3-3-3-3) Burst Read Cycles
    - Support EDO DRAM 5/6-2-2-2(-2-2-2-2) Burst Read Cycles
    - Support SDRAM 5/6/7-1-1-1(-2/3-1-1-1) Burst Read Cycles
    - Support X-1-1-1/X-2-2-2/X-3-3-3 Burst Write Cycles
    - Two Programmable Non-cacheable Regions
    - Option to Disable Local Memory in Non-cacheable Regions
    - Shadow RAM in Increments of 16 Kbytes
    - Pseudo Directory/Page Scheme for Mapping Graphical Texture 
      Access to Physical Memory Address
    - Built-in 8 Way Associative/16 Entries GART cache to Minimize the 
      Number of Memory Bus Cycles Required for Accessing Graphical 
      Texture Memory
    - Programmable Counters to Ensure Guaranteed Minimum Access Time 
      for A.G.P., CPU, and PCI accesses
o   Provides High Performance PCI Arbiter.
    - Support up to 5  PCI Masters
    - Support Rotating Priority Mechanism
    - Hidden Arbitration Scheme Minimizes Arbitration Overhead.
    - Support Concurrency between CPU to Memory and PCI to PCI
    - Support Concurrency between CPU to 33Mhz PCI Access and 33Mhz 
      PCI to A.G.P. Access
    - Support Concurrency between CPU to 66Mhz PCI Access and A.G.P. 
      to 33Mhz PCI Access
    - Programmable Timers Ensure Guaranteed Minimum Access Time for 
      PCI Bus Masters, and CPU
o   Integrated Host-to-PCI Bridge
    - Support Asynchronous and Synchronous PCI Clock
    - Translates the CPU Cycles into the PCI Bus Cycles
    - Zero Wait State Burst Cycles
    - Support IDE Posted Write
    - Support Pipelined Process in CPU-to-PCI Access
    - Support Advance Snooping for PCI Master Bursting
    - Maximum PCI Burst Transfer from 256 Bytes to 4 Kbytes
    - Support Memory Remapping Function for PCI master accessing 
      Graphical Window
o   Integrated A.G.P. Compliant Target/66Mhz Host-to-PCI Bridge
    - Support Asynchronous and Synchronous A.G.P. Clock
    - Support 1X, and 2X Mode for A.G.P. 66/133 MHz 3.3V device
    - Support Graphic Window Size from 4Mbytes to 256Mbytes
    - Different arbitration policy for A.G.P. devices and 66Mhz PCI 
      devices.
    - Translates Sequential CPU-to-A.G.P. Memory Write Cycles into 
      A.G.P. Bus (PCI66) Burst Cycles
    - Zero Wait State Burst Cycles
    - Support Pipelined Process in CPU-to-A.G.P. Access
    - Support Advance Snooping for A.G.P. Master initiate system 
      memory access with PCI Cycles
    - Support 8 Way, 16 Entries Page Table Cache to enhance A.G.P. 
      Read/Write Performance
    - Support Both 1-Level and 2-Level GART (Graphic Address Re-
      Mapping Table)
    - Maximum PCI Burst Transfer from 256 Bytes to 4 Kbytes
    - Programmable Counters to Ensure Guaranteed Minimum Access Time 
      for Low Priority Request, CPU to A.G.P./and A.G.P. Master 
      Transaction
    - Support PCI-to-PCI bridge function for memory write from 33Mhz 
      PCI bus to A.G.P. bus
o   Integrated Posted Write Buffers and Read Prefetch Buffers to 
    Increase System Performance
    - CPU-to-Memory Posted Write Buffer (CTMFF) with 8 QW Deep, Always 
      Sustains 0 Wait Performance on CPU-to-Memory
    - CPU-to-Memory Read Buffer with 4 QW Deep
    - CPU-to-PCI Posted Write Buffer(CTPFF) with 8 DW Deep
    - PCI-to-Memory Posted Write Buffer(PTHFF) with 8 QW Deep, Always 
      Streams 0 Wait Performance on PCI-to/from-Memory Access
    - PCI-to-Memory Read Prefetch Buffer(CTPFF) with 8 QW Deep
    - CPU-to-PCI66 Posted Write Buffer(CTAFF) with 8 DW Deep
    - PCI66-to-Memory Posted Write Buffer(ATHFF) with 8 QW Deep
    - A.G.P. Request Queue With the Depth of 32
    - A.G.P. High Priority Write Queue with 64 QW Deep
    - A.G.P. Low Priority Write Queue with 64 QW Deep
    - A.G.P. High Priority Read Return Queue with 64 QW Deep
    - A.G.P. Low Priority Read Return Queue with 64 QW Deep
o   Fast PCI IDE Master/Slave Controller
    - Bus Master Programming Interface for ATA Windows 95 Compliant 
      Controller
    - Plug and Play Compatible
    - Support Scatter and Gather
    - Support Dual Mode Operation - Native Mode and Compatibility 
      Mode
    - Support IDE PIO Timing Mode 0, 1, 2 ,3 and 4
    - Support Multiword DMA Mode 0, 1, 2
    - Support Ultra DMA/33
    - Two Separate IDE Bus
    - Two 16 DW FIFO for PCI Burst Transfers.
o   Support NAND Tree for Ball Connectivity Testing
o   553-Balls BGA Package
o   0.35μm 3.3V CMOS Technology

**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:...

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