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**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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
***Notes:...
***Info:
The 82498 Cache Controller and multiple 82493 Cache SRAMs combine with
the Pentium processor (735/90,  815/100) and future Pentium Processors
to form a CPU Cache chip set designed for high performance servers and
function-rich  desktops. The high-speed  interconnect between  the CPU
and  cache components has  been optimized  to provide  zero-wait state
operation. This CPU  Cache chip set is fully  compatible with existing
software,  and has new  data integrity  features for  mission critical
applications.

The 82498 Cache Controller implements the MESI write-back protocol for
full multiprocessing support.  Dual ported buffers and registers allow
the 82498  to concurrently  handle CPU bus,  memory bus,  and internal
cache operation for maximum performance.

The 82493 is a customized high-performance SRAM that supports 64-, and
128-bit  wide memory  bus widths,  32-,  and 64-byte  line sizes,  and
optional sectoring. The  data path between the CPU  bus and memory bus
is  separated  by  the  82493,  allowing  the  CPU  bus  to  handshake
synchronously,  asynchronously,  or   with  a  strobed  protocol,  and
allowing concurrent CPU bus and memory bus operations.

***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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*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
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*TI (Texas Instruments)...
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*Unresearched:...
*VIA...
*VLSI...
**VL82C312         SCAMP Power Management Unit (PMU)                 ?
***Info;...
***Versions:...
***Features:
o   Provides system activity monitoring, peripheral control, power 
    supply control, mode timers, and general purpose I/O for 
    laptop/notebook power management
o   Five operation modes:
    - On Mode
    - Doze Mode
    - Sleep Mode
    - Suspend Mode
    - Off Mode
o   Independent programmable timers for power saving modes
o   independent programmable timers for LCD and backlight control
o   Ten individual power control outputs
    - Three for LCD power
    - Seven general purpose for peripherals
o   Four "low battery" warning monitors: two standard and two 
    optional
o   Multiple power-on sources from Suspend/Off Mode:
    - Pushbutton
    - RTC alarm
    - Modem ring
o   AC power monitoring to disable PMU function
o   Refresh support in suspend Mode
o   Leakage control of outputs during Suspend Mode
o   wide range of LCD panel power-up/down sequencing
o   Ten general purpose I/O ports; eight with additional i/O 
    features:
    - one programmable blinking I/O
    - Two optional low battery inputs
    - three inputs AND/OR selectable I/O with one common GPIO output
o   Watchdog timer to turn off system power if low battery NMI is
    not serviced
o   Programmable NMI generation on:
    - PMU power mode
    - Low battery warning
    - External input
    - LCD panel timer
    - Reschedule Suspend Mode NMI by BIOS
o   Controls SCAMP's SLEEP pin
o   RTC alarm IRQ output pin for SCAMP
o   Additional logic included to minimize system board component 
    count
o   Provides chip selects for:
    - IDE interface
    - Floppy disk controller
    - VL16C452 serial/parallel I/O chip
o   Provides multiplexed address/data bus for VGA controller
o   Chip ID and revision register
o   144-pin MQFP low-power CMOS IC

**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...
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