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**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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**82C556M/7M/8E  Viper-N+ Viper Notebook Chipset                  c:96
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82C566/7/8     Viper-Max Chipset Scalable MultiMedia PC Solution   ?...
**82C571/572     486/Pentium                                      c:93...
**82C576/7/8     Viper Xpress  [no datasheet]                        ?...
**82C576/8/9     Viper XPress+ [no datasheet, some info]     <01/16/97...
**82C596/597     PTMAWB Pentium Adaptive Write-back (Cobra)       c:93...
**82C650/1/2     Discovery (Pentium Pro) [no datasheet]              ?
***Configurations:...
**82C681/2/6/7   386/486WB EISA                                   c:92...
**82C683         386/486AWB EISA [no datasheet]                      ?...
**82C693/6/7     Pentium uP Write Back Cache EISA                 c:93...
**82C700         FireStar                                         c:97...
**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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*Western Digital...
**WD7855        System controller for 80386SX                <09/25/92
***Notes:...
***Info:...
***Configurations:...
***Features:
Features common to both versions of the WD7855
o   Single chip AT systems logic for desktops, notebooks, palmtops
o   Supports 80386SX microprocessors at speeds up to 33 MHz
o   Supports static, dynamic or cached CPUs
o   Flexible DRAM support: 64K, 256K, 512K x 9, 1 Mbits, 4 Mbits, 
    1M x 18 bits or 2M x 9 bits
o   Choice of non-page or page DRAM operating modes while supporting 
    optional extra wait states for page mode
o   Up to eight banks of two-way interleave memory support
o   Support for major DRAM standards, including 88-pin DRAM card 
    modules
o   User-definable, non-cachable regions
o   Supports external look aside cache
o   Snoop interface to support cached CPUs
o   Programmable full 16-bit I/O decode
o   High-speed, local video bus (VLBI) support
o   Slow Refresh
o   Stop DMA clock
o   0.9 micron CMOS technology
o   160-pin MQFP package
o   Three fully programmable Chip Selects in addition to standard 
    Chip Selects
o   AUTOFAST (automatic CPU speedup)
o   SMI and I/O trapping
o   Suspend/Resume modes
o   Hibernation mode
o   Multiple CPU speeds
o   CPU Sleep/CPU Powerdown modes
o   Peripheral and I/O power control
o   System Activity Monitor (SAM) for idle detection

WD7855LV Laptop Design
o   Supports 3.3 volt operation with on-chip translators for 
    5 volt AT bus (Split rail operation)

**WD7900/LP/LV  System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD8110        System controller for 80386DX/486            <11/30/93...
**
**Support Chips:
**WD76C20x   Floppy, RTC, IDE and Support Logic Device       <11/25/91...
**WD76C30x   Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91...
**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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