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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...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C556M/7M/8E  Viper-N+ Viper Notebook Chipset                  c:96
***Notes:...
***Info:...
***Configurations:...
***Features:
System 
o   100% PC/AT compatible
o   Supports 3.3V Intel Pentium 75/90/100/120 processors at bus 
    frequencies up to 66MHz
o   Supports Cyrix 6x86 processor

DRAM 
o   Full 64-bit FPM/EDO DRAM controller
    - Supports 2-2-2 EDO pipeline at 66MHz bus speed
    - Supports 5V or 3.3V DRAM with-out buffers
    - Supports up to 512MB
    - Controls up to 6 banks
    - Post write buffer
o   Selectable current drive for DRAM bus 

Cache 
o   L1 Cache supports write-through and write-back modes
o   Power managed L2 Cache
    - 64KB-2MB cache
    - Write-back or write-through modes
    - 2-1-1-1 synchronous cache cycles
    - 3-1-1-1 pipelined synchronous cache cycles
    - Combined tag/dirty SRAM option

ISA/VL/PCI Bus 
o   Integrated PCI bus with operation up to 33MHz; supports up to 
    three masters
o   CLKRUN# support for PCI
o   Distributed DMA support (software-based)
o   100% AT-compatible ISA bus; 3.3V or 5V operation, also supports 
    ISA bus masters
o   VL bus support (slave only)
o   Integrated Local Bus IDE supports four drives, which can be bus 
    masters, modes 4 and 5 supported  

Power Management
o   Advanced Power Management Unit
o   Full CPU System Management Mode (SMM) support
o   Full CPU power control through "clock throttling"
o   Full system clock control, even CPU clock can be stopped during 
    APM doze mode
o   Both hardware and software controlled power management
o   Full peripheral power control
o   13 flexible peripheral timers
o   Sixteen power control pins
o   I/O trapping captures address and data
o   Distributed DMA support (software-based)
o   Full peripheral activity tracking
o   Automatic peripheral power-up/power-down features
o   Full suspend current leakage control
o   36 Power Management Interrupt (PMI) sources
o   Eight external power management interrupt sources
o   Supports SMBASE re-programmability that allows the cache to be
    maintained during system management mode, avoiding cache fills 
    after returning from SMM
o   Proprietary automatic internal pull-up/pull-down resistors 
    activated only when needed to reduce power consumption

Thermal Management
o   Advanced Thermal Management Unit
o   Internal mechanism tracks CPU activity and initiates cool down
    mode before CPU temperature reaches a damaging level
o   External sensor option

Packaging
o   82C556M Data Buffer
    - 176 pin TQFP (0.5mm pin spacing)
o   82C557M System Controller
    - 208 pin TQFP (0.5mm pin spacing)
o   82C558E Peripheral Controller
    - 208 pin TQFP (0.5mm pin spacing)

82C602A RTC/Buffer Companion Chip
o   Integrated Real-Time Clock
o   Based on Benchmark Bq3285
o   256 bytes battery-backed memory
o   Integrates multiplexing/demultiplexing logic, latches, and 
    buffers
o   Eliminates most/all TTL in typical synchronous cache system
o   100 pin TQFP package (0.5mm pin spacing)
o   Also available in 100 pin PQFP
     
**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]              ?...
**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...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
**UM82C380     386 HEAT PC/AT Chip Set                             <91
***Info:...
***Configurations:...
***Features:...
**UM82C480     386/486 PC Chip Set                                 c91...
**UM82C493/491 ??????????????? [no datasheet]                        ?...
**UM8498/8496  486 VL Chipset  "Super Energy Star Green"[no dsheet]c94
***Notes:...
***Configurations:...
**UM8881/8886  HB4 PCI Chipset "Super Energy Star Green"[no dsheet]c94...
**UM8890       Pentium chipset [no datasheet]                        ?...
**
**Support Chips:
**UM82152      Cache Controller (AUStek A38152 clone)              <91...
**UM82C852     Multi I/O For XT                                    <91...
**UM82C206     Integrated Peripheral Controller                    <91...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
*VIA...
*VLSI...
**VL82C420/144/146     SCAMP IV [no datasheet, some info]          c93
***Notes:...
**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                               ?
***Info:...
***Versions:...
***Features:...
**VL82C114 Combination I/O chip                                      ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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