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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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**82C700         FireStar                                         c:97
***Info:...
***Configurations:...
***Features:...
**82C701         FireStar Plus                                    c:97...
**82C750         Vendetta      [no datasheet]                        ?...
**82c801         SCWB2 DX Single Chip Solution                    c:92...
**82C802         SCWB2 PC/AT Single Chip [no datasheet]              ?...
**82C802G/GP     System/Power Management Controller (cached)      c:93...
**82C895         System/Power Management Controller (cached)   c:Sep94...
**82C898         System/Power Management Controller (non-cache)c:Nov94...
**
**Support Chips:
**82C601/2       Buffer Devices                                 <Nov94...
**82C822         PCIB (VLB-to-PCI bridge)                         c:94...
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*Winbond...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O)                          c97
***Info:
GENERAL DESCRIPTION

This data sheet covers  two products: W83977F/G, and W83977AF/AG whose
pin assignment, and most of the functions are the same. W83977AF/AG is
an advanced version of W83977F/G featuring the FIR function.

W83977F/G,  W83977AF/AG  are  evolving  products from  Winbond’s  most
popular I/O chip  W83877F -- which integrates the  disk drive adapter,
serial  port  (UART),  IrDA   1.0  SIR,  parallel  port,  configurable
plug-and-play  registers  in one  chip  ---  plus additional  powerful
features: ACPI, 8042 keyboard controller with PS/2 mouse support, Real
Time  Clock,  14  general  purpose  I/O  ports,  full  16-bit  address
decoding, TV  remote IR (Consumer  IR, supporting NEC,  RC-5, extended
RC-5, and  RECS-80 protocols).  In addition,  W83977AF/AG provides the
functions of IrDA 1.1 (MIR for 1.152M bps or FIR for 4M bps).

The disk  drive adapter functions of W83977F/G,  W83977AF/AG 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/  DMA   logic.  The  wide  range  of  functions
integrated onto the W83977F/G,  W83977AF/AG greatly reduces the number
of components  required for interfacing  with floppy disk  drives. The
W83977F/G, W83977AF/AG supports up to 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,1 Mb/s, and 2 Mb/s.

The W83977F/G, W83977AF/AG provide 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. Both  UARTs  provide legacy  speed  with baud  rate
115.2k and provide advanced speed  with baud rate 230k, 460k, and 921k
bps  which support  higher speed  modems.  W83977AF/AG  alone provides
independent 3rd UART (32-byte FIFO) dedicated for IR function.

The  W83977F/G, W83977AF/AG  supports one  PC-compatible  printer port
(SPP), Bi-directional  Printer port  (BPP) and also  Enhanced Parallel
Port (EPP)  and Extended Capabilities Port (ECP).  Through the printer
port  interface  pins, also  available  are:  Extension  FDD Mode  and
Extension 2FDD Mode allowing one or two external floppy disk drives to
be connected.

The   configuration  registers   support   mode  selection,   function
enable/disable,  and power down  function selection.  Furthermore, the
configurable  PnP  features  are  compatible  with  the  plug-and-play
feature demand of Windows 95TM, which makes system resource allocation
more efficient than ever.

W83977F/G,  W83977AF/AG  provides  functions  that  comply  with  ACPI
(Advanced Configuration  and Power Interface),  which includes support
of  legacy and  ACPI  power  management through  SMI  or SCI  function
pins. W83977F/G, W83977AF/AG also  has auto power management to reduce
power consumption.

The keyboard  controller is based  on 8042 compatible  instruction set
with a 2K Byte programmable ROM and a 256-Byte RAM bank. Keyboard BIOS
firmware is available with  optional AMIKEY-2, Phoenix MultiKey/42, or
customer code.

The  W83977F/G, W83977AF/AG  provides a  set of  flexible  I/O control
functions to the system designer  through a set of General Purpose I/O
ports. These GPIO ports may serve as simple I/O or may be individually
configured to provide a pre-defined alternate function.

W83977F/G,  W83977AF/AG is made  to fully  comply with  Microsoft PC97
Hardware Design Guide. IRQs, DMAs, and I/O space resource are flexible
to adjust to meet ISA PnP requirement. Full 16-bit address decoding is
also  provided. Moreover W83977F/G,  W83977AF/AG is  made to  meet the
specification of PC97‘s requirement  in the power management: ACPI and
DPM (Device Power Management).

***Versions:...
***Features:...
**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...
**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...
**
**Other:...
*ZyMOS...
*General Sources:...

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