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**82489DX       Advanced Programmable Interrupt Controller    10/12/92
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**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91...
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**UM8890       Pentium chipset [no datasheet]                        ?
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**
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**UM82152      Cache Controller (AUStek A38152 clone)              <91...
**UM82C852     Multi I/O For XT                                    <91...
**UM82C206     Integrated Peripheral Controller                    <91...
**UM82c45x     Serial/Parallel chips                                 ?...
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**W86C452   I/O controller for IBM PC/AT                         Jul89
***Info:
GENERAL DESCRIPTION

The W86C452 is an enhanced dual-channel version of the popular W86C450
asynchronous  communication element  (ACE) fabricated  using WINBOND'S
CMOS process.  It is  equivalent to VL160452  of the  VLSI Technology
Inc.

The  device   supports  two  serial-to-parallel   conversion  on  data
characters  received  from  a  peripheral  device  or  a  MODEM.   and
parallel-to-serial  conversion on  data characters  received  from the
CPU.

The CPU  can read the complete status  of the UART at  any time during
the  functional operation.  Status  information reported  includes the
type and condition  of the transfer operations being  performed by the
UART as  well as  any error conditions  (parity. overrun,  framing, or
break interrupt).

The UART includes  a programmable baud rate generator  that is capable
of dividing the timing reference clock input by divisors of l to (2^16
-1), and  producing a 16 x  clock for driving  the internal transmiter
logic. Provisions  are also included to  use this 16 x  clock to drive
the  receiver  logic.   The  UART includes  a  complete  MODEM-control
capability  and  a  processor-interrupt  system.   Interrupts  can  be
programmed  to  the  user’s  requirements,  minimizing  the  computing
required to handle the communications link.

In addition  to its communication interface  capabilities, the W86C452
provides the user with  a fully bidirectional parallel Centronics type
printer.  This part  allows  information received  from either  serial
communication port to be printed from the dual ACE.

***Versions:...
***Features:...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
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