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**A note on VESA support of 486 chipsets.
Many chipsets state  that they support VESA local  bus.  In some cases
these actually  implement VLB somewhat  like PCI, where it  is entirly
decoupled from the CPU bus. Chipsets  that do not state they work with
VLB,  may  be found  on  motherboards  that  contain VLB  slots.   VLB
is  *basically*  The 486  CPU  pinout in  a  slot  form. Unless  these
m/boards contain  some additional  chips, there VLB  implementation is
directly coupled to the CPU.

**Datasheets:...
*_IBM...
*ACC Micro...
*ALD...
*ALi...
*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
**F8680/A  PC/CHIP Single-Chip PC                                  c93
***Notes:...
***Info:...
***Configurations:...
***Features
o   3.3V/5V operation, fully static design, and intelligent sleep mode 
    reduce power consumption approximately 60 percent and allow direct
    battery drive.
o   PC-compatible design supports PC software and 8-bit ISA cards.
o   SuperState R mode provides a separate operating environment and 
    enables complete I/O and interrupt monitoring without BIOS 
    modification.
o   Virtual I/O feature allows device emulation as well as I/O 
    monitoring and control.
o   Virtual Interrupts feature allows interrupts to be monitored and/
    or redirected before any operating system, application program, 
    or TSR sees them.
o   26-bit address bus enables 64MB memory map and allows direct 
    support of PCMCIA  memory card.
o   Four-stage pipeline and 14MHz operation give performance 
    comparable to a 286 or 386SX system.
o   Flexible memory management supports PCMCIA cards and up to three 
    banks of PSRAM, SRAM, and/or DRAM.
o   Bank switching and high memory access overcome the 1MB addressing 
    limitation of the 8086 processor, and enable PCMCIA and EMS 
    support.
o   Single CGA controller manages a CRT or LCD panel display and 
    requires only a single 32Kx8 SRAM to minimize power consumption 
    and board space.
o   Visual Map gray scaling provides excellent visual contrast on any 
    LCD panel.
o   16C450-compatible UART supports COM1 or COM2 or can be disabled.
o   Over 100 configuration registers allow flexibility, control, and 
    differentiation in system design.

F8680A adds:

o   Full PCMCIA 2.0 memory and I/O card support ensure compatibility 
    with current and future expansions.

**
**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...
**82395SX     Smart Cache                                     12/17/90
***Notes:...
**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...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...