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**82C836   Single Chip 386sx (SCATsx)                              <91
***Info:
The 82C836, also  known as SCATsx, is a VLSI  device that incorporates
most of  the motherboard logic  required to  build a low  cost, highly
integrated,  IBM PC  AT compatible  computer using  the 386sx.   It is
designed to be  used in conjunction with other  Chips and Technologies
controllers such as  the 82C45X VGA Controller,  and 82C710 integrated
Floppy  Disk  and  Multifunction  Controller.  When  used  with  these
devices, the  82C836 acts as the  heart of a highly  integrated system
that significantly reduces the  motherboard size, component count, and
the need for many I/O channel  slots. Figure 1 [see datasheet] shows a
block diagram for the basic system architecture.

***Configurations:...
***Features:...
**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]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**82420EX     PCIset (for 486) EX (Aries)   (82425EX/82426EX)   <Dec94
***Notes:...
***Info:...
***Configurations:
82425EX PCI  System Controller (PSC)
82426EX ISA  Bridge (IB)

+ 82091AA (AIP)

The  AIP is  not  technically part  of the  chipset,  see the  82091AA
section for details.

It  appears that  there  exists a  datasheet  that claims  50 MHz  bus
operation. Section 9 of the '94 datasheet "Revision history" contains:

  "Revision -003 of the 82420EX PCIset data sheet contains updates and
   improvements to the original version. A revision summary of changes
   is listed below.

   The sections significantly revised since revision -001 are:

   Global The 82420EX PCIset supports host bus operations of 25 and 33
          MHz. All references to 50 MHz support have been removed.
  " 

Indicating the early datasheet was incorrect, or the feature was plan-
ned but never implemented.

The following link provides a  brief summary of two different versions
of the chipset itself. There has been no datasheet found that mentions
these problems:

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

Archived:
https://web.archive.org/web/20040803185002/http://www.os2forum.or.at/english/info/os2hardwareinfo/pci_chips.html


***Features:...
**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
***Notes:...
***Info:...
***Versions:...
***Features:...
**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...
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**950        LPC I/O                                         <07/16/99
***Info:...
***Versions:...
***Features:...
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**PII/III/Pro...
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