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**82C711   Universal Peripheral Controller II                  c:Jan91
***Info:
The 82C711/712 Universal Peripheral  Controller II (UPC II) are single
chip  controllers offering  a complete  I/O solution  for the  PC-XT &
PC-AT   environments.  The   82C711   and  82C712   chips  are   nearly
operationally and pin identical.

The  82C711  supports the  MOTHERBOARD  application.  It provides  one
enhanced parallel port  (printer/bi-directional), two 16450 UARTs, one
IDE  XT/AT  hard  disk  interface  and  floppy  disk  controller.  The
configuration is  software controllable which can  be integrated into
system BIOS. Power management is  done through the PWRGD pin. When the
chip is powered down (PWRGD  inactive), the current drawn is less that
250  micro  amp.   All  inputs  are  disabled  and   all  outputs  are
inactive. The contents of all  the registers are preserved, as long as
the power supply to the 82C711 is maintained.

The 82C712 supports the  ADAPTER applications. It provides one printer
port,  two  16450 UARTs,  IDE  AT  hard  disk interface,  floppy  disk
controller, and one game port chip select.

The 82C711/712 feature 24 mA  drives for the output buffers, including
the  host data  bus  and parallel  port  data bus.  The floppy  output
drivers  are  capable  of  sinking  48mA. The  host  interface  is  PC
compatible and  can be connected  directly to the bus  (DO-D7, A0-A9,
IOR, IOW, AEN, IRQ3, IRQ4, FINTR, PINTR, and RESET).

***Versions:...
***Features:...
**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...
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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...
**
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