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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...
**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
***Info:...
***Versions:...
***Features:
Floppy Disk Controller
o   Single-chip floppy solution
o   Software compatible with NEC 765B and Intel 82077
o   Perpendicular recording support
o   48mA disk drivers and Schmitt-trigger inputs
o   Direct support for two drives, and up to four drives with external 
    decoder
o   Enhanced digital data separator
o   No external filter components required
o   Support for 250KB/s, 300KB/s, 500KB/s and 1MB/sec data rates
o   Primary and secondary floppy address port selects

Serial Ports
o   Two NS16550 compatible UARTs
o   16-byte FIFO
o   Modem control circuitry
o   Optional PS/2 type mouse port logic operated under BIOS and 
    software driver control

IDE Interface
o   Provides a complete IDE interface for embedded hard disk drives.
o   Primary and secondary IDE address port selects.

Parallel Port----Printgine
o   Multiprotocol parallel port interface, P1284-compatible 
o   Compatible with IBM PC, XT, AT, and PS/2 architectures
o   Standard and bidirectional parallel port
o   Microsoft and Hewlett-Packard Extended Capabilities Port (ECP), 
    Enhanced 
    Parallel Port (EPP), and fast Centronics protocols support
o   Transfer rates up to 2MB/sec possible with fast protocols
o   Protocols implemented in hardware to reduce software overhead
o   24mA parallel port output drivers
o   128-byte FIFO

General
o   100-percent compatible with IBM PC, XT and AT architectures
o   24mA AT/XT bus interface buffers
o   Game port and general purpose chip select logic
o   On-chip power management features, controllable through hardware 
    and/or software
o   Configuration via software
o   100-pin QFP package

**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...
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