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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
***Notes:...
***Info:...
***Versions:...
***Features:...
**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...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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**5571           (Trinity) Pentium PCI/ISA Chipset (75MHz)   <12/09/96
***Info:...
***Configurations:...
***Features:
o   Supports Intel Pentium CPU and other compatible CPU at 
    75/66/60/50MHz (external clock speed)
o   Supports the Pipelined Address Mode of Pentium CPU
o   Supports the Full 64-bit Pentium Processor data Bus
o   Supports 32-bit PCI Interface
o   Integrated Second Level (L2) Cache Controller
    - Write Through and Write Back Cache Modes
    - 8 bits or 7 bits Tag with Direct Mapped Cache Organization
    - Integrated 16K bits Dirty Ram
    - Supports Pipelined Burst SRAM
    - Supports 256 KBytes to 512 MBytes Cache Sizes
    - Cache Read/Write Cycle of 3-1-1-1-1-1-1-1 at 66 MHz
o   Integrated DRAM Controller
    - Supports 3 Banks of FP/EDO SIMMs, or 2 Banks of SDRAM DIMMs
    - Supports 2Mbytes to 384Mbytes of main memory
    - Supports 256K/512K/1M/2M/4M/16M x N FP/EDO/SDRAM DRAM
    - Supports 3V or 5V DRAM.
    - Supports Symmetrical and Asymmetrical DRAM.
    - Supports 32 bits/64 bits mixed mode configuration
    - Supports Concurrent Write Back for FP/EDO DRAM
    - Supports Mixed DRAM (FP/EDO/SDRAM) Technology
    - Supports CAS before RAS Refresh
    - Supports Relocation of System Management Memory
    - Programmable CAS# ,RAS#, RAMW# and MA Driving Current
    - Fully Configurable for the Characteristic of Shadow RAM (640 
      KBytes to 1 MBytes)
    - Supports FP DRAM 5-3-3-3(-3-3-3-3) Burst Read Cycles
    - Supports EDO DRAM 4/5-2-2-2(-2-2-2-2) Burst Read Cycles
    - Supports SDRAM 6/7-1-1-1(-2-1-1-1) Burst Read Cycles
    - Supports X-1-1-1/X-2-2-2/X-3-3-3 Burst Write Cycles
    - Supports 8 Qword Deep Buffer for Read/Write Reordering, Dword 
      Merging and 3/2-1-1-1 Post write Cycles
    - Two Programmable Non-Cacheable Regions
    - Option to Disable Local Memory in Non-Cacheable Regions
    - Shadow RAM in Increments of 16 KBytes
o   Integrated PMU Controller
    - Supports SMM Mode of CPU
    - Supports CPU Stop Clock
    - Supports Break Switch
    - Supports Modem Ring Wakeup
    - Supports Automatic Power Supply Control
o   Provides High Performance PCI Arbiter.
    - Supports 3 internal masters and 5 external  PCI Masters
    - Supports Rotating Priority Mechanism
    - Hidden Arbitration Scheme Minimizes Arbitration Overhead.
    - Supports Concurrency between CPU to Memory and PCI to PCI.
o   Integrated Host-to-PCI Bridge
    - Supports Asynchronous/Synchronous PCI Clock
    - Translates the CPU Cycles into the PCI Bus Cycles
    - Provides CPU-to-PCI Read Assembly and Write Disassembly 
      Mechanism
    - Translates Sequential CPU-to-PCI Memory Write Cycles into PCI 
      Burst Cycles
    - Zero Wait State Burst Cycles
    - Supports 8 DW Deep Buffer for CPU-to-PCI Posted Write Cycles
    - Supports Pipelined Process in CPU-to-PCI Access
    - Supports Advance Snooping for PCI Master Bursting
    - Maximum PCI Burst Transfer from 256 Bytes to 4 Kbytes
    - Fast back-to-back
o   Integrated Posted Write Buffers and Read Prefetch Buffers to 
    Increase System Performance
    - CPU-to-Memory Posted Write Buffer (CTMFF) with 8 QW Deep, Always 
      Sustains 0 Wait Performance on CPU-to-Memory.
    - CPU-to-PCI Posted Write Buffer(CTPFF) with 8 DW Deep
    - PCI-to-Memory Posted Write Buffer(PTHFF) with 8 QW Deep, Always 
      Streams 0 Wait Performance on PCI-to/from-Memory Access
    - PCI-to-Memory Read Prefetch Buffer(CTPFF) with 8 QW Deep
o   Built-in one 32-bit General Purpose Register
o   Integrated PCI-to-ISA Bridge
    - Translates PCI Bus Cycles into ISA Bus Cycles
    - Translates ISA Master or DMA Cycles into PCI Bus Cycles
    - Provides a Dword Post Buffer for PCI to ISA Memory cycles
    - Two 32 bit Prefetch/Post Buffers Enhance the DMA and ISA Master 
      Performance
    - Fully Compliant to PCI 2.1
o   Enhanced DMA Functions
    - 8-, 16- bit DMA Data Transfer
    - ISA compatible, and Fast Type F DMA Cycles
    - Two 8237A Compatible DMA Controllers with Seven Independent 
      Programmable Channels
    - Provides the Readability of the two 8237 Associated Registers
o   Built-in Two 8259A Interrupt Controllers
    - 14 Independently Programmable Channels for Level- or Edge-
      triggered Interrupts
    - Provides the Readability of the two 8259A Associated Registers
o   Three Programmable 16-bit Counters compatible with 8254
    - System Timer Interrupt
    - Generates Refresh Request
    - Speaker Tone Output
    - Provides the Readability of the 8254 Associated Registers
o   Built-in Keyboard Controller
    - Hardwired Logic Provides Instant Response
    - Supports PS/2 Mouse
    - Support Hot Key "Sleep" Function
o   Built-in Real Time Clock(RTC) with 256B CMOS SRAM
o   Fast PCI IDE Master/Slave Controller
    - Fully Compatible with PCI Local Bus Specification V2.1
    - Supports PCI Bus Mastering
    - Plug and Play Compatible
    - Supports Scatter and Gather
    - Supports Dual Mode Operation - Native Mode and 
      Compatibility Mode
    - Supports IDE PIO Timing Mode 0, 1, 2 of ANSI ATA Specification
    - Supports Mode 3 and Mode 4 Timing Proposal on Enhanced IDE 
      Specification
    - Supports Multiword DMA Mode 0, 1, 2
    - Separate IDE Bus
    - Two 8x32-bit FIFO for PCI Burst Read/Write Transfers.
o   Universal Serial Bus Controller
    - Host/Hub Controller
    - Two USB ports
o   On-Board Plug and Play Support
    - One Steerable DMA Channel
    - One Steerable Interrupt
    - One Programmable Chip Select
o   Supports the Reroutibility of the four PCI Interrupts
o   Supports Flash ROM
o   480-Pin BGA Package
o   0.5 μm CMOS Technology

**5581/5582      (Jessie)  Pentium PCI/ISA Chipset (75MHz)   <04/15/97...
**5591/5592/5595 (David)   Pentium PCI A.G.P. Chipset        <01/09/98...
**5596/5513      (Genesis) Pentium PCI Chipset               <03/26/96...
**5597/5598      (Jedi)    Pentium PCI/ISA Chipset           <04/15/97...
**530/5595       (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540            (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x            SoC (System-on-chip)                        <03/14/02...
**
**Support chips:
**85C206     Integrated Peripheral Controller [no datasheet]         ?...
**5595       Pentium PCI System I/O                          <12/24/97...
**950        LPC I/O                                         <07/16/99
***Info:
The SIS950 is  a LPC Interface based highly  integrated Super I/O. The
SIS950 provides the most  commonly used legacy Super I/O functionality
plus  the latest  Environment  Control initiatives,  such as  Hardware
Monitor, Fan Speed Controller  and SiS’s "SmartGuardian" function. The
device’s   LPC   interface   complies   with  Intel   "LPC   Interface
Specification  Rev.  1.0" (Sept.  29,  1997).   The  SIS950 meets  the
"Microsoft PC98 &  PC99 System Design Guide" requirements  and is ACPI
compliant.

The SIS950 features the  enhanced hardware monitor providing 3 thermal
inputs  from  remote  thermistors,  thermal diode  or  diode-connected
transistor  (2N3904).  The device  also  provides  the SiS  innovative
intelligent   automatic   Fan  ON/OFF   &   speed  control   functions
(SmartGuardian) to reduce overall system noise and power consumption.

The  SIS950   has  integrated  nine  logical   devices,  featuring  an
Environment  Controller   (controls  three  Fans).    The  Environment
Controller has  temperature, voltage and  Fan Speed monitors.  One Fan
Speed Controller  is responsible to  control three fan  speeds through
three 128  steps of  Pulse Width Modulation  (PWM) output pins  and to
monitor three fan's tachometer inputs.

Other  features  include   one  high-performance  2.88MB  floppy  disk
controller, with  digital data  separator, supporting two  360K/ 720K/
1.2M/ 1.44M/ 2.88M floppy disk drives. One multi-mode high-performance
parallel  port  features  the  bi-directional Standard  Parallel  Port
(SPP), the  Enhanced Parallel  Port (EPP  V.  1.7 and  EPP V.  1.9 are
supported),  and the  IEEE 1284  compliant Extended  Capabilities Port
(ECP).   Two  16C550  standard   compatible  enhanced   UARTs  perform
asynchronous  communication,  and  support  IR,  one  consumer  remote
control (TV  remote) IR, one  MPU-401 UART mode compatible  MIDI port,
one  game port  with  built-in 558  quad  timers and  buffer chips  to
support  direct connection  of 2  joysticks,  and six  ports (48  GPIO
pins).  There is  also a flash ROM interface  with Address (FA[0:18]),
Data (FD[0:7]),  and supporting three  control signals FCS#,  FWE# and
FRD#. In addition,  a SmartGuardian engine is provided  to monitor the
system condition and reacts to the detected condition accordingly.

These nine logical devices can be individually enabled or disabled via
software configuration registers.  The SIS950 utilizes power-efficient
circuitry  to  reduce power  consumption.  Once  a  logical device  is
disabled, the inputs are gated  inhibit, the outputs are TRI-STATE and
the input  clock is disabled. The  SIS950 requires a  single 48/24 MHz
clock input and operates with a single +5V power supply.

The SIS950 is available in 128-pin PQFP (Plastic Quad Flat Package).

***Versions:...
***Features:...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
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