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**Cant find a chip?...
**Why this document is not GPL or a wiki...
**Definition of a chip set:...
**'chip set', 'chip-set' or 'chipset'?...
**What's not included:...
**Who made the first chip set?...
**Spelling errors/mistyped words...
**Info needed on:...
**A note on VESA support of 486 chipsets....
**Datasheets:...
*_IBM...
**IBM PC/XT/AT...
*ACC Micro...
**Notes:...
**ACC82010   AT Chip Set          (286 12.5/16MHz Max)             c88...
**ACC82020   Turbo PC/AT Chip Set (286/386SX 25MHz Max)            c88...
**ACC82021   Turbo PC/AT Chip Set (286/386SX 25MHz Max)            >88...
**ACC82300   386 AT Chip Set (386DX)                               c88...
**ACC82C100  Single-Chip PC/XT Systems-Controller                  c90...
**ACC83000   Model 30 Integrated Chip Set (MCA)                    c88...
**ACC85000/A Model 50/60 Chipset (MCA)                             c88...
**ACC1000    Turbo PC/XT Integrated Bus and Peripheral Ctrl.  04/02/88...
**ACC2036    Single Chip Solution 2036 (286/386SX)              <Jul92...
**ACC2046/ST 486DX/486SX/386DX Single Chip AT                   <Jul92...
**ACC2048    WB 486 Notebook/Embedded Single Chip [no datasheet]     ?...
**ACC2051/NT PCI Single Chip Solution for Notebook Applications    c96...
**ACC2056    ?Pentium 3.3V Notebook               [no datasheet]<Jan96...
**ACC2057    PCI Notebook/Embedded Single Chip    [no datasheet]<Aug96...
**ACC2066NT  486 Notebook/Embedded Single Chip    [no datasheet]     ?...
**ACC2086    486 VL-based System Super Chip Soluti[no datasheet]     ?...
**ACC2087    Enhanced Super Chip (486 Single Chip)              <Aug96...
**ACC2089    486 PCI-based System Super Chip      [no datasheet]     ?...
**ACC2168/GT 32-bit 486 Green System Single Chip  [no datasheet]     ?...
**ACC2178A   32-bit 486 Green System Single Chip  [no datasheet]     ?...
**ACC2268    ?486                                 [no datasheet]     ?...
**ACC????    Maple/Maple-133 486-System-On-Chip   [no datasheet]     ?...
**
**Support Chips:
**ACC2016    Buffer and MUX Logic                                  c96...
**ACC2020    Power Management Chip                                 c92...
**ACC5500    Multifunction I/O Control Chip for PS2 Model 50/60    c88...
**
**Other chips...
*ALD...
**Notes:...
**Chips with no datasheet:...
**93C488         5x86/486 Single Chip PCI controller            <Aug96...
*ALi...
**Notes:...
**M1207          286 Single Chip                  [no datasheet]     ?...
**M1217/M1209    386SX/SLC Single Chip (40MHz)    [no datasheet]   c91...
**M1219          386DX/486 ISA Cache? Single Chip [no datasheet]     ?
**M1419          386DX/486 ISA Cache  Single Chip [no datasheet]   c91
**Ml429/31/35    486 VLB/PCI/ISA      [no datasheet, some info] cOct93...
**M1439/31/45    486 VLB/PCI/ISA      [no datasheet, some info] <May95...
**M1489/87       FinALi-486 PCI Chipset                         <Feb95...
**M????          Genie, Quad Pentium  [no datasheet, some info]    c95...
**M1451/49       Aladdin    (Pentium) [no datasheet]                 ?...
**M1511/12/13    Aladdin II (Pentium) [no datasheet, some info] >Apr95...
**M1521/23       Aladdin III       50-66MHz                     <Nov96...
**M1531/33/43    Aladdin IV & IV+  50-83.3MHz                <05/28/97...
**M1541/42/33/43 Aladdin V & V+    50-100MHz                         ?...
**M1561/43/35D   Aladdin 7 ArtX    [no datasheet, some info]  11/08/99...
**M6117          386SX Single Chip PC                              <97...
**
**Support Chips:
**M1535/D        South Bridge                                        ?...
**
**May not exist:...
**Later Chipsets:...
**Other:...
*AMD . . . . . . . [no datasheets, some info]...
**AMD Am286ZX/LX  (286 Embeded CPU + integrated peripherals)         ?
**AMD Elan Series (386/486 Embeded CPU + integrated peripherals)     ?
**AMD 640/645     (Pentium Based on VIA VT82C590) [some info]      c97...
**Later Chipsets:...
*Chips & Technologies...
**CS8220   PC/AT compatible CHIPSet (82C201/C202/A203/A204/A205)cOct85...
**CS8221   NEW Enhanced AT (NEAT)   (82C211/82C212/82C215/82C206)  c86...
**CS8223   LeAPset                  [no datasheet]                   ?
**CS8225   CHIPS/250 PS/2 50/60     [no datasheet, some info]      c88...
**CS8227   CHIPSlite                (82C235/82C641)                  ?...
**CS8230   386/AT                   (82C301/302/303/304/305/306)cFeb87...
**CS8231   TURBO CACHE-BASED 386/AT (82C301/307/303/304/305/306)   c86...
**CS8232   CMOS 386/AT              (82C301/302/303/304/305/306)   c86...
**CS8233   PEAK/386 AT (Cached)     (82C311/82C315/82C316)     c:Dec90...
**CS8236   386/AT                   (82C301/2/3/4/5/6/206)         c86...
**CS8237   TURBO CACHE-BASED 386/AT (82C301/7/3/4/5/6/206)         c86...
**CS8238   CHIPS/280 & 281 (386 MCA)(82C321/322/325/223/226)   c:Aug89...
**CS82310  PEAK/DM 386 AT           (82C351/82C355/82C356)         c91...
**CS8281   NEATsx (386SX)           (82C811/812/215/206)       c:Dec89...
**CS8283   LeAPset-sx               (82C841/82C242/82C636)     c:Mar90...
**CS8285   PEAKsx                   (82C836/82C835)                c91...
**CS8288   CHIPSlite-sx             (82C836/82C641/82C835)          c?...
**CS4000   WinCHIPS                 (64200/84021/84025)            c92...
**CS4021   ISA/486                  (84021/84025)                  c92...
**CS4031   CHIPSet                  (84031/84035)              5/10/93...
**CS4041/5 CHIPSet                  (84041/84045)              2/10/95...
**CB8291   ELEAT                    [no datasheet]                 c90...
**CB8295   ELEATsx                  [no datasheet]                 c90...
**82C100   IBM PS/2 Model 30/Super XT                                ?...
**82C110   IBM PS/2 Model 30/Super XT                                ?...
**82C235   Single Chip AT (SCAT)                                   c89...
**82C836   Single Chip 386sx (SCATsx)                              <91...
**F8680/A  PC/CHIP Single-Chip PC                                  c93...
**
**Support Chips:
**64200    (Wingine) High Performance 'Windows Engine'         c:Oct91...
**82C206   Integrated Peripheral Controller                        c86...
**82C601/A Single Chip Peripheral Controller                 <08/30/90...
**82C607   Multifunction Controller                             <Jun88...
**82C710   Universal Peripheral Controller                     c:Aug90...
**82C711   Universal Peripheral Controller II                  c:Jan91...
**82C712   Universal Peripheral Controller II                  c:Jan91...
**82C721   Universal Peripheral Controller III                 c:May93...
**82C735   I/O Peripheral Controller With Printgine            c:Jul93...
**82C835   Single CHIP 386sx AT Cache Controller               c:Apr91...
**F87000   Multi-Mode Peripheral Chip                         11/23/93...
**Other:...
**Disk:...
**Video:...
*Contaq  . . . . . [no datasheets, some info]...
**82C591/2  3/486                                               <Mar92...
**82C593    3/486 [no datasheet]                                <May92...
**82C596/A  3/486 Writeback Cache [no datasheet]             <11/11/92...
**??????    486 EISA chipset [no datasheet]                     <Feb93...
**82C599    PCI-VLB Bridge [no datasheet, some info]                 ?...
**82C693    PCI-ISA Bridge [no datasheet]                            ?...
*Efar Microsystems [no datasheets, some info]...
**EFAR-8290WB 386/486 Writeback PC/AT Chipset     [no datasheet]     ?...
**82EC798     386/486 Writeback PC/AT Single Chip [no datasheet]     ?
**Other:...
*ETEQ...
**??????     "Cougar/Bobcat" 386DX/486DX chipset [no datasheet] cNov91...
**??????     "Bengal"  386DX/486 (WriteBack)     [no datasheet] cNov91...
**ET2000     386/486 WB Chipset                                      ?...
**ET6000     "Cheetah" 486DX/SX Non-Cache System                <Apr92...
**ET9000     "Jaguar" 486 Write Back Cache AT Single Chip       <Jun92...
**ET9800/391 "Firefox" 386SX Write Back chipset [no datasheet]       ?...
**82C390SX   "Panda" S.C. 386SX Direct Mapped Cache [no d.sheet]cFeb92...
**66x8       VIA clones [no datasheet]                               ?...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel
**IBM PC/XT/AT Chip Sets...
**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...
***Info:
The 82396SX  Smart Cache (part number  82396SX) is a  low cost, single
chip,  16-bit  peripheral  for  Intel's i386  SX  Microprocessor.   By
storing frequently accessed code or  data from main memory the 82396SX
Smart Cache  enables the  i386 SX Microprocessor  to run at  near zero
wait states.  The  dual bus architecture allows another  bus master to
access the System Bus while the i386 SX Microprocessor operates out of
the 82396SX Smart Cache on the Local Bus.  The 82396SX Smart Cache has
a snooping mechanism which  maintains cache coherency with main memory
during these cycles.

The 823968X Smart Cache is completely software transparent, protecting
the integrity of system software.  The advanced architectural features
of the  82596SX Smart Cache offer  high performance with  a cache data
RAM size that  can be integrated on a single  chip, offering the board
space  and cost  savings needed  in  an i386  SX Microprocessor  based
system.

1.0 823968X SMART CACHE FUNCTIONAL OVERVIEW
1.1 Introduction

The primary function of a cache  is to provide local storage for freq-
uently  accessed  memory   locations.   The  cache  intercepts  memory
references and handles them  directly without transferring the request
to the System Bus. This results in lower traffic on the System Bus and
decreases latency on the Local Bus. This leads to improved performance
for a processor  on the Local Bus. It  also increases potential system
performance by  reducing each processor's demand for  System Bus band-
width, thus allowing more processors  or system masters in the system.
By providing fast access to frequently used code and data the cache is
able  to  reduce  the  average  memory  access time  of  the  i386  SX
Microprocessor based system.

The 82396SX Smart Cache is  a single chip cache subsystem specifically
designed for  use with the  i386 SX Microprocessor. The  82396SX Smart
Cache integrates 16KB cache, the Cache Directory and the cache control
logic onto  one chip. The  cache is unified  for code and data  and is
transparent to application software.  The 82396SX Smart Cache provides
a cache consistency mechanism which  guarantees that the cache has the
most recently  updated version of  the main memory.   Consistency sup-
port has no performance impact on the i386 SX Microprocessor.  Section
1.2 covers all the 82396SX Smart Cache features.

The  82396SX  Smart Cache  architecture  is  similar  to the  i486  SX
Microprocessor's on-chip cache. The  cache is four Way SET associative
with Pseudo LRU (Least  Recently Used) replacement algorithm. The line
size is  16B and a  full line is  retrieved from the memory  for every
cache miss. A TAG is associated with every 16B line. The 82396SX Smart
Cache  architecture allows for  cache read  hit cycles  to run  on the
Local Bus  even when the System  Bus is not  available.  82396SX Smart
Cache incorporates a new write buffer cache architecture, which allows
the i386  SX Microprocessor to continue operation  without waiting for
write cycles to actually update the main memory.

A  detailed  description of  the  cache  operation  and parameters  is
included in Chapter 2.

The 82396SX Smart Cache has  an interface to two electrically isolated
busses. The interface to the i386 SX Microprocessor bus is referred to
as the Local Bus (LB) interface.  The interface to the main memory and
other system devices is referred  to as the 82396SX Smart Cache System
Bus  (SB)   interface.   The  SB   interface  emulates  the   i386  SX
Microprocessor.   The  SB interface,  as  does  the  i386TM SX  Micro-
processor. operates in pipeline mode.

In addition, it is enhanced by  an optional burst mode for Line Fills.
The burst mode provides faster line fills by allowing consecutive read
cycles  to  be  executed at  a  rate  of  up  to  one word  per  clock
cycle. Several bus masters (or several 82396SX Smart Caches) can share
the same  System Bus and the  arbitration is done  via the SHOLD/SHLDA
mechanism (similar to the i486 SX Microprocessor).

Cache  consistency   is  maintained  by   the  SAHOLD/SEADS#  snooping
mechanism, similar  to the i486  SX Microprocessor. The  82396SX Smart
Cache  is  able to  run,  a zero  wait  state  i386 SX  Microprocessor
non-pipelined read cycle if the data exists in the cache. Memory write
cycles can run with zero wait states if the write buffer is not full.

The 82396SX Smart  Cache organization provides a higher  hit rate than
other standard configurations.  The 82396SX Smart Cache, featuring the
new high  performance write  buffer cache architecture,  provides full
concurrency  between the  electrically isolated  Local Bus  and System
Bus. This allows the 82396SX Smart Cache to service read hit cycles on
the Local Bus while running line fills or buffered write cycles on the
System Bus.

1.2 Features
1.2.1 823858X-LIKE FEATURES

o The 82396SX  Smart Cache maps  the entire physical address  range of
  the i386 SX Microprocessor (16MB)  into an 16KB cache.  Unified code
  and data cache.

o Cache attributes  are handled by  hardware.  Thus the  82396SX Smart
  Cache is  transparent to  application software.  This  preserves the
  integrity  of  system  software  and  protects  the  users  software
  investment. 

o Word  and Byte writes,  Word reads. 

o Zero wait states in read hits and in buffered write cycles. All i386
  SX  Microprocessor  cycles  are  non-pipelined (Note:  The  i386  SX
  Microprocessor must  never be pipelined  when used with  the 82396SX
  Smart Cache  - NA# must  be tied to  Vcc).

o A  hardware  cache FLUSH#  option.   The  82396SX  Smart Cache  will
  invalidate all the  Tag Valid bits in the  Cache Directory and clear
  the System Bus line buffer when FLUSH# is activated tor a minimum of
  four  CLK’s.

o The 82396SX Smart Cache supports non-cacheable accesses.

o The  82396SX  Smart  Cache  internally  decodes  the  i387  SX  Math
  Coprocessor accesses as Local  Bus cycles.

o The  System   Bus  interface  emulates  a   i386  SX  Microprocessor
  interface.  

o The 82396SX Smart Cache  supports pipelined and non-pipelined system
  interface.

o Provides  cache  consistency  (snooping):  The 82396SX  Smart  Cache
  monitors the System Bus address via SEADS# and invalidates the cache
  address if  the System Bus  address matches a  cached location.

1.2.2 NEW FEATURES

o 16KB on chip cache arranged in four banks, one bank for each way. In
  Read hit cycles,  one word is read.  In a write  hit cycle, any byte
  within the  word can be written.   In a cache fill  cycle, the whole
  line (16B) is written.  This  large line size increases the hit rate
  over smaller  line size caches.

o Cache architecture  similar to the  i486 SX Microprocessor  cache: 4
  Way  set associative  with Pseudo  LRU replacement  algorithm.  Line
  size is 16B and a full line is retrieved from memory for every cache
  miss. A  Tag Valid Bit and  a Write Protect Bit  are associated with
  every Line.

o New  write buffer  architecture  with four  word  deep write  buffer
  provides zero  wait state memory  write cycles. I/O,  Halt/ Shutdown
  and  LOCK#ed  writes  are  not  buffered.

o Concurrent Line Buffer Cacheing: The  82396SX Smart Cache has a line
  buffer that is  used as additional memory. Before  data gets written
  to the cache memory at the completion of a Line Fill it is stored in
  this buffer.  Cache  hit cycles to the line  buffer can occur before
  the line  is written to the  cache. 

o In i387 SX Math Coprocessor accesses, the 82396SX Smart Cache drives
  the READYO# in  one wait state if the READYI# was  not driven in the
  previous clock.

  Note that the timing of the 82396SX Smart Cache’s READYO# generation
  for  i387 SX  Math  Coprocessor cycles  is  incompatible with  80287
  timing.

o An enhanced System Bus interface:
  a) Burst  Option is supported in  line-fills similar to  the i486 SX
     Microprocessor.   SBRDY#  (System  Burst  READY) is  provided  in
     addition to SRDY#.  A burst is  always a 16 byte line fill (cache
     update) which is equivalent to eight word cycles.

  b) System cacheability attribute  is provided (SKEN#). SKEN# is used
     to determine whether the current  cycle is cacheable.  It is used
     to qualify Line Fill requests.

  c) SHOLD/SHLDA system  bus arbitration  mechanism is  supported.   A
     Multi  i386 SX  82396SX Smart  Cache cluster  can share  the same
     System Bus via this mechanism.

  f) Cache invalidation  cycles supported via SEAD$#. This  is used to
     provide cache coherency.

o Full Local Bus/System Bus concurrency is attained by:
  a) Servicing cache read hit cycles on the Local Bus while completing
     a Line Fill on the System  Bus. The data requested by the i386 SX
     Microprocessor is provided  over the local bus as  the first word
     of the Line Fill.

  b) Servicing cache read hit  cycles on the Local Bus while executing
     buffered write cycles on the system bus.

  c) Servicing  cache read hit cycles  on the Local  Bus while another
     bus master is running (DMA, other i386 SX Microprocessor, 82396SX
     Smart Cache, i486 SX Microprocessor, etc...)  on the System Bus.

  d) Buffering write  cycles on the Local Bus while  the system bus is
     executing other  cycles.  Write protected areas  are supported by
     the SWP# input. This enables caching of ROM space or shadowed ROM
     space.

o No Post  Input (NPI#)  provided for disabling  of write  buffers per
  cycle. This option supports memory mapped l/O designs.

o Byte  Enable Mask  (BEM)  is  provided to  mask  the processor  byte
  enables during a memory read cycle.

o A2oM# input provided for emulation of 8086 address wrap-around.

o SRAM test mode, in which the TAGRAM and the cache RAM are treated as
  standard SRAM, is provided. A Tristate Output test mode is also pro-
  vided for system debugging. In  this mode the 82396SX Smart Cache is
  isolated from  the other  devices in the  board by floating  all its
  outputs.

o Single chip, 132 lead PQFP package, 1 micron CHMOS-IV technology.

***Versions:
82396SX  20 MHz, integrates 16KB cache

***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...
***Features:
o   Supports Intel/AMD/Cyrix/IDT Pentium CPU Host Bus at 
    66/75/83/95/100 MHz and 2.5/3.3V Bus Interface
    − Supports the Pipelined Address of Pentium compatible CPU
    − Supports the Linear Address Mode of Cyrix CPU
    − 100/100, 95/95, 83/83, 75/75 and 66/66 MHz Synchronous 
      Host/DRAM clocking configuration
    − 100/75, 95/75, 83/66, 66/100 and 66/83 MHz Asynchronous 
      Host/DRAM clocking configuration
    − Supports Host Bus operation for integrated 3D VGA Controller
o   Meets PC99 Requirements
o   Supports PCI Revision 2.2 Specification
o   Integrated Super AGP VGA for Hardware 2D/3D Video/Graphics 
    Accelerators
    − Supports tightly coupled 64 bits 100MHz host interface to VGA 
      to speed up GUI performance and the video playback frame rate
    − Built-in programmable 24-bit true-color RAMDAC up to 230 MHz 
      pixel clock
    − Built-in reference voltage generator and monitor sense circuit
    − Supports loadable RAMDAC for gamma correction in high color 
      and true color modes
    − Built-in dual-clock generator
    − Supports Multiple Adapters and Multiple Monitors
    − Built-in PCI multimedia interface
    − Flexible design for shared frame buffer or local frame buffer 
      architecture
    − Shared System Memory Area 2MB, 4MB and 8MB
    − Supports SDRAM and SGRAM local frame buffer and memory size up 
      to 8 MB
    − Supports Digital Flat Panel Port for Digital Monitor (LCD Panel)
    − Supports DVD H/W Accelerator
o   Integrated Second Level ( L2 ) Cache Controller
    − Write Back Cache Mode
    − Direct Mapped Cache Organization
    − Supports Pipelined Burst SRAM
    − Supports 256K/512K/1M/2M Bytes Cache Sizes
    − Cache Hit Read/Write Cycle of 3-1-1-1
    − Cache Back-to-Back Read Cycle of 3-1-1-1-1-1-1-1
    − Supports Single Read Allocation for L2 Cache
    − Supports Concurrency of CPU to L2 cache and Integrated A.G.P. 
      VGA master to DRAM accesses
o   Integrated DRAM Controller
    − Supports up to 3 double sided DIMMs (6 rows memory)
    − Supports 8Mbytes to 1.5 GBytes of main memory
    − Supports Cacheable DRAM Sizes up to 256 MBytes
    − Supports 1M/2M/4M/8M/16M/32M x N for 2-bank or 4-bank SDRAM
    − Supports 3.3V DRAM
    − Supports Concurrent Write Back
    − Supports CAS before RAS Refresh, Self Refresh
    − Supports Relocation of System Management Memory
    − Programmable CS#, DQM#, SRAS#, SCAS#, RAMWE# and MA Driving 
      Current
    − Option to Disable Local Memory in Non-cacheable Regions
    − 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 Integrated A.G.P. VGA, CPU, and PCI accesses
    − Two Programmable Non-cacheable Regions
    − Supports X-1-1-1/X-2-2-2 Burst Write Cycles
    − Fully Configurable for the Characteristic of Shadow RAM (640 
      KBytes to 1 MBytes)
    − Shadow RAM in Increments of 16 KBytes Built-in 8 Way 
      Associative/16
    − Supports SDRAM 7/8-1-1-1 Burst Read Cycles
o   Provides High Performance PCI Arbiter
    − Supports up to 4 PCI Masters
    − Supports Rotating Priority Mechanism
    - Hidden Arbitration Scheme Minimizes Arbitration Overhead
    - Supports Concurrency between CPU to Memory and PCI to PCI
    - Supports Concurrency between CPU to 33Mhz PCI Access and 33Mhz 
      PCI to integrated A.G.P. VGA Access
    - Programmable Timers Ensure Guaranteed Minimum Access Time for 
      PCI Bus Masters, and CPU
o   PCI Bus Interface
    - Supports 32-bit PCI local bus standard Revision 2.2 compliant
    - Integrated write-once subsystem vendor ID configuration register
    - Supports zero wait-state memory mapped I/O burst write
    - Integrated 2 stages PCI post-write buffer to enhance frame 
      buffer write performance
    - Integrated 256 bits read cache to enhance frame buffer read 
      performance
    - Supports full 16-bit re-locatable VGA I/O address decoding
o   Integrated Host-to-PCI Bridge
    - Supports Asynchronous PCI Clock
    - Translates the CPU Cycles into the PCI Bus Cycles
    - Zero Wait State Burst Cycles
    - Supports Pipelined Process in CPU-to-PCI Access
    - Maximum PCI Burst Transfer from 256 Bytes to 4 Kbytes
    - Supports Memory Remapping Function for PCI master accessing 
      Graphical Window
o   Integrated A.G.P. Compliant Target/66Mhz Host-to-PCI Bridge
    - Supports Graphic Window Size from 4MBytes to 256MBytes
    - Supports Pipelined Process in CPU-to-Integrated 3D A.G.P. 
      VGA Access
    - Supports 8 Way, 16 Entries Page Table Cache for GART to enhance 
      Integrated A.G.P. VGA Controller Read/Write Performance
    - Supports PCI-to-PCI bridge function for memory write from 33Mhz 
      PCI bus to Integrated A.G.P. VGA
o   Integrated Posted Write Buffers and Read Prefetch Buffers to 
    Increase System Performance
    - CPU-to-Memory Posted Write Buffer (CTMFF) with 12QW 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 with 2 QW Deep
    - PCI-to-Memory Posted Write Buffer with 8 QW Deep, Always 
      Streams 0 Wait Performance on PCI-to/from-Memory Access
    - PCI-to-Memory Read Prefetch Buffer with 8 QW Deep
    - CPU-to-VGA Posted Write Buffer with 4 QW Deep
o   Fast PCI IDE Master/Slave Controller
    - Bus Master Programming Interface for Windows 98 Compliant 
      Controller
    - Plug and Play Compatible
    - Supports Scatter and Gather
    - Supports Dual Mode Operation - Native Mode and Compatibility 
      Mode
    - Supports IDE PIO Timing Mode 0, 1, 2 ,3 and 4
    - Supports Multiword DMA Mode 0, 1, 2
    - Supports Ultra DMA 33/66
    - Two Separate IDE Bus
    - Two 16 DW FIFO for PCI Burst Transfers.
o   Supports NAND Tree for Ball Connectivity Testing
o   576-Balls BGA Package
o   3.3V Core with mixed 2.5V, 3.3V and 5V I/O CMOS Technology

**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...
**SL82C360   'Haydn' 80386DX/SX chipset [no datasheet]         c:Jun91...
**SL82C460   'Haydn II' 80486 chipset   [no datasheet]         c:Jun91...
**SL82C470   'Mozart' 486/386 EISA chipset                     c:Dec91...
**SL82C490   'Wagner' 486?              [no datasheet]               ?...
**SL82C550   'Rossini' Pentium          [no datasheet]            c:95...
**
**Support Chips:
**SL82C365    Cache Controller (for 386DX/SX)                     c:91...
**SL82C465    Cache Controller (for 486/386DX/SX)                 c:91...
*TI (Texas Instruments)...
**SN74LS610/2 IBM AT: SN74LS610, SN74LS612 Memory Mappers          <84...
**TACT82000   3-Chip 286 [no datasheet]                            c89...
**TACT82411   Snake  Single-Chip AT Controller                     c90...
**TACT82S411  Snake+ Single-Chip AT Controller [no datasheet]      c91...
**TACT83000   AT 'Tiger' Chip Set (386)                            c89...
**TACT84500   AT Chip Set (486, EISA) [no datasheet, some info]    c91...
**Other:...
*UMC...
**UM82C***     (IBM/INTEL Direct replacement)                      c87...
**UM82C088     PC/XT Integration Chip                              <91...
**UM82C230     286AT MORTAR Chip Set                               <91...
**UM82C210     386SX/286 AT Chip Set                               <91...
**UM82C3xx     Twinstar & UM82C336F/N & UM82C39x [no datasheet]      ?...
**UM82C380     386 HEAT PC/AT Chip Set                             <91...
**UM82C480     386/486 PC Chip Set                                 c91...
**UM82C493/491 ??????????????? [no datasheet]                        ?...
**UM8498/8496  486 VL Chipset  "Super Energy Star Green"[no dsheet]c94...
**UM8881/8886  HB4 PCI Chipset "Super Energy Star Green"[no dsheet]c94...
**UM8890       Pentium chipset [no datasheet]                        ?...
**
**Support Chips:
**UM82152      Cache Controller (AUStek A38152 clone)              <91...
**UM82C852     Multi I/O For XT                                    <91...
**UM82C206     Integrated Peripheral Controller                    <91...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
**A - D...
**E - G...
**H - I...
**J - R...
**S...
**T - Z...
*VIA
**SL9XXX   FlexSet family General information...
**SL9011   System Controller (80286/80386SX/DX, 16/20/25MHz)    <Jan90...
**SL9020   Data Controller                                      <Jan90...
**SL9025   Address Controller                                   <Jan90...
**SL9030   Integrated Peripheral Controller                     <Jan90...
**SL9090/A Universal PC/AT Clock Chip                           <oct88...
**SL9095   Power  Management Unit                                    ?...
**SL9151   80286 Page Interleave Memory Controller (16-25MHz)        ?...
**SL9250   80386SX Page Mode Memory Controller (16/20MHz 8MB)        ?...
**SL9251   80386SX Page Interleave Memory Controller         <04/13/90...
**SL9252   80386SX System and Memory Controller              <06/12/90...
**SL9350   80386DX Page Mode Memory Controller (16-25MHz 16MB)       ?...
**SL9351   80386DX Page Interleave Memory Controller (33MHz)         ?...
**SL9352   80386DX System and Memory Controller              <06/12/90...
**SLXXXX   Other chips...
**
**VT82C470     "Jupiter", Chip Set (w/o cache) 386 [no datasheet]    ?
**VT82C475     "Jupiter", Chip Set (w/cache) 386   [no datasheet]    ?
**VT82C486/2/3 "GMC chipset"            [no datasheet, some info]    ?...
**VT82C495/480 "Venus" Chip Set                    [no datasheet]    ?
**VT82C495/491 ? EISA Chip Set          [no datasheet, some info]  <93...
**VT82C496G    Pluto, Green PC 80486 PCI/VL/ISA System       <05/30/94...
**VT82C530MV   3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M    Apollo Master, Green Pentium/P54C             <06/22/95...
**VT82C580VP   Apollo VP,  Pentium/M1/K5 PCI/ISA System      <02/15/96...
**VT82C580VPX  Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590     Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT  Apollo VP3, Single-Chip for Pentium with AGP  <10/03/97...
**VT82C598MVP  Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501       Apollo MVP4,Single-Chip 66-100MHz & AGP       <11/04/98...
**VT82C680     Apollo P6, Pentium-Pro Chip Set               <08/30/96...
**Support chips:
**VT82C505     Pentium/486 VL to PCI Bridge                  <05/30/94...
**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96...
**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
**Later P-Pro/II/III/Celeron...
**Later AMD...
**Other...
*VLSI...
**Notes:...
**VL82C***              IBM/INTEL Direct replacement                 ?...
**VL82CPCAT-QC          AT 12 MHz 0/1 ws                           c88...
**VL82CPCPM-QC          AT 16 MHz 0/1 ws [no datasheet]            c88...
**VL82CPCAT-16QC/-20QC  AT 16 MHz or 20 MHz, 0/1 ws     +386SX     c89...
**VL82CPCPM-16QC/-20QC  AT 16 MHz or 20 MHz, Page-Mode  +386SX     c89...
**VL82C031/032/033      PS/2 Model 30-compatible chip set          c88...
**VL82C286-SET     TOPCAT 286/386SX PC/AT-Compatible Chip Set        ?...
**VL82C386-SET     TOPCAT 386DX PC/AT-Compatible Chip Set            ?...
**VL82C386sx-SET   TOPCAT 286/386SX PC/AT-Compatible Chip Set        ?...
**VL82C310         SCAMP-LT                                          ?...
**VL82C311         SCAMP-DT                                          ?...
**VL82C311L        SCAMP-DT 286                                      ?...
**VL82C312         SCAMP Power Management Unit (PMU)                 ?...
**VL82C315A        SCAMP II, Low-Power Notebook Chipset              ?...
**VL82C322A        SCAMP II, Power Management Unit (PMU)             ?...
**VL82C316         SCAMP II, PC/AT-Compatible System Controller      ?...
**VL82C323         SCAMP II, 5 Volt Power Management Unit (PMU)      ?...
**VL82C380         Single chip 386DX PC/AT Controller +on-chip cache ?...
**VL82C325             VL82C386SX System Cache controller            ?...
**VL82C335             VL82C386DX System Cache ctrl. [no d.sheet]    ?...
**VL82C315A/322A/3216  Kodiak 32-Bit Low-Voltage Chip Set            ?...
**VL82C420/144/146     SCAMP IV [no datasheet, some info]          c93...
**VL82C480         System/Cache/ISA bus Controller                   ?...
**VL82C481         System/Cache/ISA bus Controller                 c92...
**VL82C486         Single-Chip 486, SC486, Controller                ?...
**VL82C425         486 Cache controller                              ?...
**????????         Cheetah 486, PCI [no datasheet]                   ?...
**VL82C3216        Bus Expanding Controller Cache with write buffer  ?...
**VL82C521/522     Lynx/M                                            ?...
**VL82C530         Eagle Ð                                         c95...
**VL82C541/543     Lynx                                            c95...
**VL82C591/593     SuperCore 590                                   c94...
**VL82C594/596/597 Wildcat                                         c95...
**I/O Chips:
**VL82C106 Combination I/O chip                                      ?...
**VL82C107 SCAMP  Combination I/O chip                               ?...
**VL82C108 TOPCAT Combination I/O chip                               ?...
**VL82C110 Combination I/O chip                                      ?...
**VL82C113 SCAMP  Combination I/O chip                               ?...
**VL82C114 Combination I/O chip                                      ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
**Notes:...
**FE2010/A      XT CPU controller integrated Circuit         >11/22/85...
**FE2011        CPU Core Logic for PS/2 Model 30 Compatible       c:87...
**FE3400/B      80286-Based AT Compatible CPU Core Logic (12 MHz) c:86...
**FE3500/B      80286-Based AT Compatible CPU Core Logic (12 MHz) c:87...
**FE3600/A/B/C  16/20MHz AT Chip set                              c:88...
**FE5300        CPU Core Logic for PS/2 Model 50/60 Compatibles   c:87...
**FE5400        CPU Core Logic for PS/2 Model 50/60 Compatibles   c:87...
**FE6500        CPU Core Logic for PS/2 Model 70/80 Compatibles   c:88...
**WD6400SX/LP   CPU Core Logic for PS/2 386SX Compatibles          <90...
**WD6500        CPU Core Logic for PS/2 386DX/486 Compatible       <90...
**WD7600A/LP/LV System Chip Set for 80286 or 80386SX         <11/25/91...
**WD7700/LP     System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD7855        System controller for 80386SX                <09/25/92...
**WD7900/LP/LV  System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD8110        System controller for 80386DX/486            <11/30/93...
**
**Support Chips:
**WD76C20x   Floppy, RTC, IDE and Support Logic Device       <11/25/91...
**WD76C30x   Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91...
**WD7615     Desktop Buffer Manager                          <04/15/92...
**WD7625     Desktop Buffer Manager                          <10/01/92...
**WD8120LV   Super I/O [no datasheet]                                ?
**Other Chips:...
*Winbond...
**Chipsets:
**W83C491/92  VL-Bus chipset (Symphony Wagner SL82C491/2)[no datasheet]
**W83C553F    System I/O Controller With PCI Arbiter           c:sep95...
**W83628F/29D PCI TO ISA Bridge Set                                c98...
**W83626F/D   LPC TO ISA Bridge Set                                <00...
**
**Multi I/O:
**W83757          SUPER I/O  CHIP                                  <92...
**W83767F         ??           Multi I/O  [no datasheet]
**W83777F/87F     Power I/O   (Multi I/O)                          <95...
**W83877F         WINBOND I/O (Multi I/O)                          <96...
**W83877TF/TG/TD  WINBOND I/O (Multi I/O)                          c97...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O)                          c97...
**W83977TF        WINBOND I/O (Multi I/O)                          c97...
**W83977EF        WINBOND I/O (Multi I/O)                          <98...
**W83977ATF       WINBOND I/O (Multi I/O)                          <98...
**
**Disk Controller:
**W83759/A/F/AF   Advanced VL-IDE Disk Controller                  <96...
**W83769          Local Bus IDE Solution                           <94...
**
**UARTS:
**W86C250A  UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter         <Jul89...
**W86C451   I/O controller for IBM PC/AT/XT                     <Jul89...
**W86C452   I/O controller for IBM PC/AT                         Jul89...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
**Other:...
*ZyMOS...
**ZyMOS POACH ...
**Other:...
*General Sources:...

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