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**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:
Date source: 1995_Intel_Pentium_Processors_and_Related_Components.pdf

Information taken from: 
            1995_Intel_Pentium_Processors_and_Related_Components.pdf*
                                         8249x Cache controllers.pdf**
>*  Datasheet dated Nov'94
>** Datasheet undated, whole document dated '95

The info and features section have  been solely sourced from the first
source.   The  second source  provides  far  more detail.   Additional
information in  the configurations section  has been sourced  from the
second.

Difference to 82497/492 is this supports 1 Mbyte to 2 Mbyte cache.

***Info:...
***Configurations:...
***Features:...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
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*OPTi...
**82C596/597     PTMAWB Pentium Adaptive Write-back (Cobra)       c:93
***Notes::...
***Info:...
***Configurations:...
***Features:...
**82C650/1/2     Discovery (Pentium Pro) [no datasheet]              ?...
**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...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
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*Unresearched:...
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*VLSI...
*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:...
*Winbond...
*ZyMOS...
*General Sources:...