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**82489DX       Advanced Programmable Interrupt Controller    10/12/92
***Notes:...
***Info:
1.0 INTRODUCTION

The  82489DX  Advanced   Programmable  Interrupt  Controller  provides
multiprocessor interrupt management, providing both static and dynamic
symmetrical interrupt distribution across all processors.

The main  function of the  82489DX is to provide  interrupt management
across all  processors. This  dynamic interrupt  distribution includes
routing of the interrupt to the lowest-priority processor. The 82489DX
works in  systems with multiple  I/O subsystems, where  each subsystem
can  have  its  own  set  of  interrupts.   This  chip  also  provides
inter-processor interrupts,  allowing any  processor to  interrupt any
processor or set  of processor. Each 82489DX I/O  init interrupt input
pin is individually  programmable by software as either  edge or level
triggered.  The interrupt vector and interrupt steering information an
be specified  per pin.  A  32-bit wide timer  is provided that  can be
programmed to interrupt the local processor.  the timer can be used as
a counter to provide a time base to software running on the processor,
or to generate  time slice interrupts locally to  that processor.  the
82489DX   provides   32-bit   software    access   to   its   internal
registers. Since no  82489DX register read have any  side effects, the
82489DX registers  can be aliased  to a  user read-only page  for fast
user access (e.g., performance monitoring timers).

The 82489DX  supports a generalized naming/addressing  scheme that can
be tailored by  software to fit a variety of  system architectures and
usage  models.   It  also  supports 8259A  compatibility  by  becoming
virtually  transparent with  regard to  an externally  connected 8259A
style controller, making the 8259A visible to software.

***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...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**5595       Pentium PCI System I/O                          <12/24/97
***Notes:...
***Info:...
***Versions:...
***Features:...
**950        LPC I/O                                         <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
**VL82C311         SCAMP-DT                                          ?
***Info:...
***Configurations:...
***Features:
o   Fully compatible with 286- or 386SX-based PC/AT compatible systems
    (VL82C311L is 286 compatible only)
o   Up to 25 MHz system clock in a 386SX-based system and up to 20 MHz
    in a 286-based system
o   Replaces the following peripheral logic on the motherboard:
    - Two 82C37A DMA controllers
    - 74LS612 memory mapper 
    - Two 82C59A interrupt controllers
    - 82C54 timer
    - 82284 clock generator and ready interface
    - 82288 bus controller
o   Includes:
    - Memory/refresh controller
    - Port B, and NMI logic
    - Bus steering logic
    - Parity generation logic
    - Parity checking logic
    - Turbo control logic
    - Staggered refresh to minimize power supply load variations
    - Three-state control pin for board level testing
o   Memory controller features include:
    - Programmable option for page mode or non-page mode operation
    - Two-way block interleaving 
    - Programmable option for zero and one wait state operation
    - Capability to drive up to four banks directly
o   VL82C310 power saving features include:
    - Sleep Mode
    - Slow DRAM refresh
    - Low power page interleave memory mode
o   Supports:
    - Up to 16 MB system memory
    - LIM EMS 4.0 over entire system memory
    - JEIDA IC Memory Card (VL92C310 only)
    - VL82C325 (SX) Cache controller
    - Four 16-bit wide banks of 256K, 1M, or 4M DRAM or SRAM
    - Shadow RAM in 640K to 1M range
    - 287 and 387SX numeric coprocessors
    - 8- and 16-bit wide BIOS ROMs
    - Asynchronous slot bus operation
    - Systems with up to 16 MHz backplane operation
    - Relocation of video and slot ROMs
o   Other advanced features:
    - Programmable I/O decode for 10- pr 16-bit addresses
    - Hardware configurable setup to minimize custom BIOS requirements
    - Programmable drive current to reduce ringing on DRAM and slot
      bus interface signals
    - Programmable, extendable peripheral cycle
    - Capability to disable software coprocessor reset
    - Automatic bus speed-up on video access
o   1.0-micron CMOS technology
o   160-lead metric quad flat pack (MQFP)

**VL82C311L        SCAMP-DT 286                                      ?...
**VL82C312         SCAMP Power Management Unit (PMU)                 ?...
**VL82C315A        SCAMP II, Low-Power Notebook Chipset              ?...
**VL82C322A        SCAMP II, Power Management Unit (PMU)             ?...
**VL82C316         SCAMP II, PC/AT-Compatible System Controller      ?...
**VL82C323         SCAMP II, 5 Volt Power Management Unit (PMU)      ?...
**VL82C380         Single chip 386DX PC/AT Controller +on-chip cache ?...
**VL82C325             VL82C386SX System Cache controller            ?...
**VL82C335             VL82C386DX System Cache ctrl. [no d.sheet]    ?...
**VL82C315A/322A/3216  Kodiak 32-Bit Low-Voltage Chip Set            ?...
**VL82C420/144/146     SCAMP IV [no datasheet, some info]          c93...
**VL82C480         System/Cache/ISA bus Controller                   ?...
**VL82C481         System/Cache/ISA bus Controller                 c92...
**VL82C486         Single-Chip 486, SC486, Controller                ?...
**VL82C425         486 Cache controller                              ?...
**????????         Cheetah 486, PCI [no datasheet]                   ?...
**VL82C3216        Bus Expanding Controller Cache with write buffer  ?...
**VL82C521/522     Lynx/M                                            ?...
**VL82C530         Eagle Ð                                         c95...
**VL82C541/543     Lynx                                            c95...
**VL82C591/593     SuperCore 590                                   c94...
**VL82C594/596/597 Wildcat                                         c95...
**I/O Chips:
**VL82C106 Combination I/O chip                                      ?...
**VL82C107 SCAMP  Combination I/O chip                               ?...
**VL82C108 TOPCAT Combination I/O chip                               ?...
**VL82C110 Combination I/O chip                                      ?...
**VL82C113 SCAMP  Combination I/O chip                               ?...
**VL82C114 Combination I/O chip                                      ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...