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*Chips & Technologies...
**CS4021   ISA/486                  (84021/84025)                  c92
***Info: 
The  4021 two-chip  CHIPSet  with CPU  is  designed for  use in  PC/AT
systems.  It  is 100 percent  compatible with 486DX, 486DX2  486SX, or
386DX processors  or Super386 CPUs without any  component changes. The
performance  to cost  ratio is  optimized  for each  CPU option.  This
design allows  the system designer flexibility and  produces an easily
upgradable system.

The 4021 provides  a low cost high-performance  non-cache solution for
486SX systems.  it offers maximum performance benefits through the use
of a CHIPS-patented page interleaving algorithm.

The  4021  CHIPSet  architecture  provides an  alternate,  faster  and
efficient bus interface for speed-sensitive devices like video, disks,
or networks.   This is to overcome  the bus speed bottlenecks  such as
those  associated  with  EISA/ISA  systems  that  can  degrade  system
performance.

***Configurations:...
***Features:...
**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
***Notes:...
***Info:...
***Configurations:...
***Features:
o   80286 control logic and clocks that support CPU speeds of up to 
    12.5MHz with zero (or one) wait-states
o   a 146818-compatible real time clock with 114 bytes of CMOS RAM
o   Two 8237-compatible DMA controllers
o   Two 8259-compatible interrupt controllers
o   An 8254-compatible programmable interval timers
o   An 8255-compatible programmable peripheral interface
o   An 82284-compatible clock generation and READY interface
o   An 82288-compatible bus controller
o   A DRAM controller that supports up to 8MB to DRAM (up to 16MB 
    with the addition of an external '538-type decoder)
o   A memory controller that provides shadow RAM and support for 
    either 8-bit or 16-bit BIOS ROM
o   A DRAM refresh controller
o   32 EMS page registers (LIM EMS 4.0-compatible)
o   Interface logic for an 80287 numeric coprocessor
o   Interface logic for an 8042 keyboard controller
o   Fast Gate A20 and Fast CPU Reset logic
o   Power management features
o   Compact packaging in a single 160-pin plastic flat pack (160PFP)

**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]...
*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...
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