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**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91
***Notes:...
***Info:...
***Features:...
**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...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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*OPTi...
**82C895         System/Power Management Controller (cached)   c:Sep94
***Notes:...
***Info:
Overview
The 82C895 provides a highly integrated solution for fully compatible,
high performance  PC/AT platforms.   This chipset will  support 486SX/
DX/DX2/DX4  and P24T microprocessors  in the  most cost  effective and
power  efficient  designs  available  today.  For  power  users,  this
chipset offers optimum performance for systems running up to 50MHz.

Based  fundamentally  on  OPTi's   proven  82C801  and  82C802  design
architectures,  the 82C895 adds  additional memory  configurations and
extensive  power  management  control  for  the  processor  and  other
motherboard components.

The  820895  supports the  latest  write-back  processor designs  from
Intel, AMD, and Cyrix, as well as supporting the AT bus and VESA local
bus  for   compatibility  and   performance.   It  also   includes  an
82C206-compatible  Integrated Peripherals Controller  (IPC). all  in a
single 208-pin PQFP (Plastic Quad Flat Pack) package for low cost.

2.1 Power Management

This block diagram [see  datasheet] exemplifies the flexibility of the
82C895/82C602 GREEN  strategy.  System designs  can easily accommodate
both SLe  and non-SLe  CPUs. If  an Intel non-SLe  CPU is  used, SMI#,
SMIACT#, and  FLUSH# are no  connects.  One design can  easily accomm-
odate both types of processors with minimal changes for upgrades.

***Configurations:...
***Features:...
**82C898         System/Power Management Controller (non-cache)c:Nov94...
**
**Support Chips:
**82C601/2       Buffer Devices                                 <Nov94...
**82C822         PCIB (VLB-to-PCI bridge)                         c:94...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
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*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
**WD76C30x   Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91
***Notes:...
***Info:...
***Versions:...
***Features:
o   Two fully programmable and independent serial I/O ports 
    configurable as PC/AT compatible (WD16C452) or PS/2 
    compatible (WD16C552)
    - Loopback controls for communications link fault isolation for 
      each ACE
    - Line break generation and detection for each ACE
    - Complete status reporting capabilities
    - Generation and stripping of serial asynchronous data control 
      bits (start, stop, parity)
    - Programmable baud rate generator and MODEM control signals for 
      each port
    - Programmable baud rate generator input clock
    - Optional 16 byte FIFO buffers on both transmit and receive of 
      each port for CPU relief during high speed data transfer
    - Programmable FIFO threshold levels of 1 , 4, 8, or 14 bytes on 
      each port
o   Parallel port configurable as a fully Centronics or PS/2 
    compatible, bidirectional parallel port
o   Independently programmable parallel port
o   Interrupt multiplexing logic
    - Selectable multiplexing logic for connecting PC/AT interrupt 
      request lines to the WD76C10 single chip AT controller
o   Clock generation circuitry
    - 80287 coprocessor clock generation
    - WD76C10 and floppy controller clock generation
    - 8042 keyboard clock generation
o   Built-in testability features
o   Hardware or software controllable sleep mode
o   CMOS implementation for high speed and low power requirements 
o   Pulse extension on IRQ inputs
o   84-pin PLCC and PQFP packages

**WD7615     Desktop Buffer Manager                          <04/15/92...
**WD7625     Desktop Buffer Manager                          <10/01/92...
**WD8120LV   Super I/O [no datasheet]                                ?
**Other Chips:...
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