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**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
***Info:
The 82C835 interfaces directly with the 386sx and has been designed to
work  closely with  the 82C836  single chip  AT (SCAT-sx).  The 82C835
contains  a 386sx  cache  controller incorporating  the cache  control
logic and  tag RAM.  Also included are  several programmable registers
provided for configuration options. The ability to configure the cache
organization (Two-Way Set-Associative or Direct Mapped) and size (16KB
or 32KB) allows a flexible selection of external data SRAM.

In addition to the cache  controller, the 82C835 integrates the AT I/O
channel  command and  address  buffers and  the corresponding  control
logic. Many existing 80386sx system implementations require the use of
external buffers,  latches, and transceivers to drive  and receive the
commands and addresses.  These systems also require external SSI logic
to control the operation of these buffers. Systems will typically save
six  to seven  external TTL  buffers and  five to  six SSI  gates when
implementing the channel interface with the 82C835. By integrating the
channel  drivers and  logic, the  82C835 reduces  the system  size and
complexity.

***Versions:...
***Features:...
**F87000   Multi-Mode Peripheral Chip                         11/23/93...
**Other:...
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*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
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*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...
**
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**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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