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**82C235   Single Chip AT (SCAT)                                   c89
***Notes:...
***Info:
The 82C235 is a VLSI  device that incorporates most of the motherboard
logic  required  to  build   a  low-cost,  highly-integrated,  IBM  PC
AT-compatible computer. It is designed  to be used in conjunction with
other  Chips  and Technologies  controllers  such  as  the 82C45X  VGA
Controller,  the 820601  Multifunction Controller,  the  82C765 Floppy
Disk   Controller,  and   the  82C710   Integrated  Floppy   Disk  and
Multifunction  Controller. When  used with  these devices,  the 82C235
acts as  the heart  of a highly  integrated system  that significantly
reduces motherboard size,  component count, and the need  for many I/O
channel slots.

***Configurations:...
***Features:...
**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
***Info:...
***Versions:...
***Features:
o   Fully static design substantially reduces power consumption when 
    compared to discrete TTL designs, allowing direct battery drive.
o   3.3V or 5V operation provides flexibility for system design and 
    allows dynamic 3.3/5V switching of system voltage to further 
    reduce power consumption.
o   Each F8700 device can be strapped to configure one of three 
    buffer modes or a multi-function mode, reducing parts inventory 
    requirements.
o   High integration means each F8700 mode replaces at least seven 
    discrete TTL devices.
o   Full isolation of PCMCIA memory and I/O cards is supported to 
    allow safe insertion and removal of cards, both "hot" and "cold."
o   PCMCIA buffer modes are completely PCMCIA 2.0-compatible.
o   For single PCMCIA card support, Mode 1 buffers 20 address lines 
    and 5 control lines.  Because of the quiet bus design of PC/CHIPm 
    the upper address lines can be connected directly to the PCMCIA 
    card slot in a single card system for full 64MB support.
o   For dual PCMCIA card support, Modes 2 and 3 together buffer all 
    necessary address and control lines for independent 64MB support 
    of each card.
o   Between PCMCIA cycles, the F87000 sets PCMCIA buses and control 
    lines to a low-power state to consume only a fraction of the power 
    used in a standard TTL buffer design.
o   Multi-function mode (Mode 4) provides keyboard scanning, a 
    parallel interface, and IDE interface, a configuration latch, and 
    a 1.8MHz UART clock generation circuit.
o   Keyboard scan interface in the multi-function mode requires only a 
    single external resister pack and provides an interrupt to the 
    system on key depression. The interface can be used instead as 
    general-purpose 16-bit output and 8-bit input ports.
o   Parallel interface in the multi-functional mode allows high-speed,
    PS/2-compatible bidirectional communication with other systems.
o   Configuration latch can be used to control seven external devices 
    plus the UART clock divider. An additional decode line accommo-
    dates an external latch for eight more device control lines.

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**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):
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**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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