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**450NX  (?)            06/29/98:
Chips:
[82454NX] (PXB) [82453NX] (MUX) 
[82452NX] (RCG) [82451NX] (MIOC) 
[82371EB] (PIIX4E),                            
CPUs:          Single/Dual/Quad P-II Xeon/P-III Xeon
DRAM Types:    FPM EDO 2-way Interleave 4-way Interleave
Mem Rows:      8
DRAM Density:  16Mbit 64Mbit
Max Mem:       8GB
ECC/Parity:    Both
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3


**?????  (Profusion)    c:99...
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*Winbond...
**W83877F         WINBOND I/O (Multi I/O)                          <96
***Info:
GENERAL DESCRIPTION

One of Winbond's popular series of I/O chips, the W83877F integrates a
disk  drive  adapter,  serial  port  (UART), parallel  port,  IDE  bus
interface, and game port decoder onto a single chip. The W83877F is an
enhanced  version of  the W83777F,  with additional  powerful features
such as  configurable plug-and-play registers  for the whole  chip and
infrared support in one of the serial ports.

The disk drive adapter functions  of the W83877F include a floppy disk
drive controller compatible with the industry standard 82077/765, data
separator,  write pre-compensation  circuit, decode  logic,  data rate
selection,  clock  generator,   drive  interface  control  logic,  and
interrupt and DMA  logic. The wide range of  functions integrated onto
the  W83877F greatly  reduces the  number of  components  required for
interfacing with  floppy disk drives. The W83877F  supports four 360K,
720K, 1.2M, 1.44M, or 2.88M disk drives and data transfer rates of 250
Kb/S, 300 Kb/S, 500 Kb/S, and 1 Mb/S.

The  W83877F  provides   two  high-speed  serial  communication  ports
(UARTs),  one of  which supports  serial Infrared  communication. Each
UART includes  a 16-byte send/receive  FIFO, a programmable  baud rate
generator,  complete   modem  control  capability,   and  a  processor
interrupt system.

The  W83877F  supports  one  PC-compatible  printer  port.  Additional
bidirectional  I/O  capability is  available  by  hardware control  or
software  programming. The  parallel port  also supports  the Enhanced
Parallel Port (EPP) and Extended Capabilities Port (ECP).

The W83877F supports two embedded  hard disk drive (AT bus) interfaces
and a game  port with decoded read/write output.  The chip's Extension
FDD Mode and Extension 2FDD Mode allow one or two external floppy disk
drives to be  connected to the computer through  the printer interface
pins in notebook computer applications.

The Extension Adapter Mode of  the W83877F allows pocket devices to be
installed  through the  printer  interface pins  in notebook  computer
applications according to a protocol set by Winbond, but with upgraded
performance. The JOYSTICK mode allows  a joystick to be connected to a
parallel port with a signal switching cable.

The configuration  registers support mode  selection, function enable/
disable,  and  power down  function  selection.   Moreover, the  conf-
igurable PnP  registers are compatible with  the plug-and-play feature
in Windows 95 , which  makes system resource allocation more efficient
than ever.
***Versions:...
***Features:...
**W83877TF/TG/TD  WINBOND I/O (Multi I/O)                          c97...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O)                          c97...
**W83977TF        WINBOND I/O (Multi I/O)                          c97...
**W83977EF        WINBOND I/O (Multi I/O)                          <98...
**W83977ATF       WINBOND I/O (Multi I/O)                          <98...
**
**Disk Controller:
**W83759/A/F/AF   Advanced VL-IDE Disk Controller                  <96...
**W83769          Local Bus IDE Solution                           <94...
**
**UARTS:
**W86C250A  UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter         <Jul89
***Info:...
***Versions:...
***Features:...
**W86C451   I/O controller for IBM PC/AT/XT                     <Jul89...
**W86C452   I/O controller for IBM PC/AT                         Jul89...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
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