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**Cant find a chip?...
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**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...
**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...
**Notes:...
**GC101/102     12/16MHz PC/AT Compatible Chip Set             c:Feb88...
**GC101/102/103 12/16MHz PC/AT Compatible Chip Set + EMS 4.0   c:Jul89...
**GCK113        80386 AT Compatible Chip Set                   c:oct89...
**GCK181        Universal PS/2 Chip Set                        c:Mar89...
**HT11          Single 286 AT Chip [no datasheet]               <Aug90...
**HT12/+/A      Single 286 AT Chip with EMS support            c:Aug90...
**HT18          80386SX Single Chip                            c:Sep91...
**HT21          386SX/286 Single Chip (20 MHz)                 c:Aug91...
**HT22          386SX/286 Single Chip (25 MHz)                 c:Sep91...
**HT25          3-volt Core Logic for 386SX                    c:Dec92...
**HT35          Single-Chip Peripheral Controller [partial info]     ?...
**HTK320        386DX Chip Set                                 c:Sep91...
**HTK340        "Shasta" 486 Chip Set                          c:Jun92...
**Support Chips:
**HT44          Secondary Cache                                c:Jun92...
**Other:...
*HMC (Hulon Microelectronics)...
**HMC82C206 Integrated Peripherals Controller (10MHz C&T 82c206)     ?...
*Logicstar...
**SL600X  PC / AT Compatible Chipset (10/12MHz)                 <Jul87...
**Support Chips:
**SL6012  Memory Mapper for PC-AT (74LS612 compatible)          <Jul87...
**SL9010  System Controller (80286/80386SX/DX, 16/20/25MHz)     <oct88...
**SL9020  Data Controller                                       <oct88...
**SL9025  Address Controller                                    <oct88...
**SL9090  Universal PC/AT Clock Chip                            <oct88...
**SL9250  Page Mode Memory Controller (16/20MHz 8MB Max)        <oct88
***Info:...
***Versions:...
***Features:...
**SL9350  Page Mode Memory Controller (16/20/25MHz 16MB Max)    <oct88...
**Other:...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
***Info:
The SiS 486-VIP (VESA/ISA/PCI) chips are two-chip solution ideally for
Intel's 80486, SL Enhanced 486, P24D/P24T/DX4 CPU, AMD's 486, Enhanced
Am486 and Cyrix's Cx486 (M7)/Cx 5x86 CPU based on green AT system.  By
supporting the most popular  industrial standard system interfaces, it
provides flexible configurations for system design and applications.

The SiS85C496  PCI & CPU  Memory Controller (PCM) integrates  the Host
Bridge (Host  Interface), the cache  and main memory  DRAM Controller,
the PCI Bridge, the built-in IDE Controller, and the FS-Link Bus (Fast
Slow  Link Bus). It  provides the  address paths  and bus  control for
transfers among  the Host  (CPU/L1 cache), main  memory (L2  cache and
DRAM),  the  Peripheral  Component  Interconnect (PCI)  Bus,  and  the
FS-Link Bus.  The L2  cache controller supports both write-through and
write-back cache policies  and cache sizes up to  1 MBytes.  The cache
memory  can be  built  using standard  asynchronous  SRAMs.  The  main
memory DRAM controller  interfaces DRAM to the Host  Bus, PCI Bus, and
FS-Link Bus. Up to eight single sided SIMMs or four double sided SIMMs
provide a maximum  of 255 MBytes of main  memory.  The installation of
DRAM SIMMs is  "Table-Free", which allows the SIMMs  be installed into
any slot  location and any  combinations.  The built-in IDE  hard disk
controller  allows CPU accessing  hard disk  and also  provides higher
system integration with  lower system cost. The 85C496  is intended to
be used with the SiS85C497 which  is a AT Bus Controller with built-in
206 controller.

The  SiS85C497 AT  Bus  Controller and  Megacells  (ATM) provides  the
interface between  PCI/CPU/Memory Bus (fast  machine) and the  ISA Bus
(slow machine).  It  also integrates many of the  common I/O functions
in today's  ISA based  PC systems.  The  85C497 comprises  the FS-Link
interface  (Fast-Slow  Link  interface),  ISA  bus  controller  ,  DMA
controller and  data buffers to isolate  the FS-Link Bus  from the ISA
Bus  and to  enhance performance.   It  also integrates  a 14  channel
edge/level  interrupt  controller, refresh  controller,  a 8-bit  BIOS
timer, three programmable timer/counters, non-maskable-interrupt (NMI)
control  logic, Power  Management  Unit,  and RTC.  Figure  1 .1  [see
datasheet] shows the system block diagram.


***Configurations:
Components:
85C496 PCI & CPU Memory Controller (PCM)
85C497 AT Bus Controller & Megacell (ATM)

Configuration:
85C496 + 85C497

It appears this is a chipset that does not communicate with PCI via
the VESA bus. This is based on the diagram in section 1.2. 

Revisions:
A4: 85C496MU + 85C497MW, IDE up to mode 2, may not be stable with caches
B2: 85C496NU + 85C497NS, IDE PIO mode 3 buggy
B3: 85C496NV + 85C497NS
B4: 85C496NV + 85C497NU
B5: 85C496OS + 85C497OT

Revision info sourced from:
http://www.os2forum.or.at/english/info/os2hardwareinfo/pci_chips.html

***Features:...
**85C501/502/503 Pentium/P54C PCI/ISA Chipset                <01/09/95...
**5101/5102/5103 Pentium/P54C PCI/ISA Chipset                <04/02/95...
**5120           Pentium PCI/ISA Chipset (Mobile)            <01/28/97...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset                <04/02/95...
**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...
**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...
*Western Digital...
*Winbond...
***Info:
GENERAL DESCRIPTION

The  W83759A  is  an  advanced  version of  Winbond's  popular  VL-IDE
interface chip,  the W83759. The  W83759A retains all of  the features
and  compatibility of  the W83759  (the chip  meets the  ANSI  ATA 4.0
specification  for IDE  hard disk  operation and  the VESA  VL-Bus 2.0
specification  for  PC  local  bus devices)  while  incorporating  new
features  to   meet  Enhanced  IDE,  SFF-8011,   ATA-2,  and  Fast-ATA
specifications.

Supports Disk Capacity of Greater than 528 MB
The W83759A's  driver can handle remapping  from BIOS CHS  mode to HDD
LBA mode.  This scheme  enables users  to break the  528 MB  per drive
barrier, allowing  full use  of BIOS INT13  CHS information  in drives
with a capacity of up to 8.4 GB.

High Speed Host Transfer Rate
The W83759A supports  Enhanced IDE PIO mode 3 and Fast  ATA PIO mode 3
and 4  timing; jumper  settings or driver  programming can be  used to
select  the PIO  mode  and a  33  or 50  MHz  VL-Bus clock.  Different
programming timing  can be selected  for different drives in  the same
system. The burst transfer rate is shown in the following table.

ATA PIO  IDE COMMAND CYCLE  BURST TRANSFER RATE  IORDY THROTTLE 
MODE     TIME (nS)          (MB/sec)             CONTROL
0 	 600  		    3.33 		 Option
1 	 383 		    5.22 		 Option
2 	 240 		    8.33 		 Option
3 	 180 		    11.1 		 Required
4 	 120 		    16.6		 Required

Dual IDE Channels
Like  the  W83759,  the  W83759A  supports  a  secondary  IDE  address
(170h-177h/376h)  and  IRQ15  for  applications with  four  hard  disk
drives.  Additionally,  the  primary  and secondary  channels  can  be
independently  enabled  or disabled  by  jumper  settings or  software
programming.

Non-disk IDE Peripherals
Because  the command  cycle can  be programmed  individually  for each
drive and  dual IDE channels  are supported, non-disk  IDE peripherals
(such  as an  ATAPI  CD-ROM or  tape  drive) can  be  attached to  the
secondary  IDE without  affecting the  transfer rate  of the  ATA disk
drive.  Sales of ATAPI  IDE CD-ROMs  are expected  to grow  rapidly as
these devices become a standard part of many users' desktop PC setup.

The W83759A provides all  of the next-generation ATA-IDE requirements,
including  support for  high  capacity disk  drives,  high speed  host
transfers, multiple IDE peripherals,  and non-disk IDE peripherals. It
makes high-performance, low-cost, easy-to-use IDE machines possible.

The  W83759A is  pin-to-pin backward  compatible with  the  W83759. In
addition  to  the  advanced  features  described  above,  the  W83759A
supports  automatic   power-down,  standby,  and   suspend  APM  power
management states for green PC applications. This new chip is packaged
in a 100-pin QFP.

The table below compares the W83759 and W83759A:

    	  		 W83759     	   W83759A
Dual Channel IDE 	 Yes 		   Yes
8.4 G Max. Cap. 	 Software Driving  Software Driving
PIO Mode 3, 4 Control 	 No 	  	   Yes*
DMA Mode Control 	 No 		   Yes*
IOCHRDY Control 	 No 		   Yes*
IDE Timing Control 	 Jumper 	   Jumper or Driver*
Prefetch Control 	 No 		   Yes*
Power Saving Control 	 No 		   Yes*
ATAPI Protocol 		 Software Driving  Software Driving

>* All control is drive-by-drive (per drive selectability)
***Versions:...
***Features:...
**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...
*General Sources:...

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