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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:
o   For MOTHERBOARD Applications with configuration via software
o   Low Power CMOS, 100 pin PQFP Package
o   On Chip Power Management Features, Controllable Through Hardware 
    and/or Software
o   100% IBM PC-XT/AT Compatibility.
o   24 mA IBM AT/XT Bus Interface Buffers
o   Schmitt Trigger Input on Reset Pin and FDC interface inputs
o   Two 16450 Compatible UARTs
o   1 IBM PC-XT/AT Compatible Enhanced (Bi-Directional) Parallel Port 
o   24 mA Parallel Port Output Drivers
o   IDE Interface (For Embeded AT & XT Hard drives)
o   Single 24 MHz Crystal/Oscillator for UART and Floppy Disk 
    Controller
o   Fully uPD72065B and IBM-BIOS Compatible Floppy Disk Controller
    - Licensed NEC design
    - 48 mA floppy drive interface buffers
    - Data rate and drive control registers
    - Two pin programmable precompensation modes
    - Supports two floppy drives directly and up to four with an 
      external decoder
    - DMA enable logic
o   On-Chip Precision Analog Data Separator
    - +/-380ns at 500K bps
    - +/-740ns at 250K bps
    - Automatically selects one of three filters
    - Supports 250 Kb/s, 300 Kb/s, 500 Kb/s & 1 Mb/s data rates 
o   Member of ELEATsx CHIPSet

**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...
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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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