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**82395SX     Smart Cache                                     12/17/90
***Notes:...
**82396SX     Smart Cache                                     12/17/90...
**82485       Turbo Cache (and 485Turbocache)                      c90...
**82489DX       Advanced Programmable Interrupt Controller    10/12/92...
**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)...
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*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**85C501/502/503 Pentium/P54C PCI/ISA Chipset                <01/09/95
***Notes:...
***Info:...
***Configurations:...
***Features:...
**5101/5102/5103 Pentium/P54C PCI/ISA Chipset                <04/02/95...
**5120           Pentium PCI/ISA Chipset (Mobile)            <01/28/97...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset                <04/02/95...
**5511/5512/5513 Pentium PCI/ISA                             <06/14/95...
**5571           (Trinity) Pentium PCI/ISA Chipset (75MHz)   <12/09/96...
**5581/5582      (Jessie)  Pentium PCI/ISA Chipset (75MHz)   <04/15/97
***Info:...
***Configuration:...
***Features:...
**5591/5592/5595 (David)   Pentium PCI A.G.P. Chipset        <01/09/98...
**5596/5513      (Genesis) Pentium PCI Chipset               <03/26/96...
**5597/5598      (Jedi)    Pentium PCI/ISA Chipset           <04/15/97...
**530/5595       (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540            (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x            SoC (System-on-chip)                        <03/14/02...
**
**Support chips:
**85C206     Integrated Peripheral Controller [no datasheet]         ?...
**5595       Pentium PCI System I/O                          <12/24/97...
**950        LPC I/O                                         <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
**VT82C496G    Pluto, Green PC 80486 PCI/VL/ISA System       <05/30/94
***Info:
The   VT82C496G  is   a  cost-effective   implementation  of   a  high
integration, high performance and  high energy efficient VL/ISA system
based  on the  80486SX/DX/DX2/DX4  or compatible  processor.  With  an
optional VT82C505  VL-PCI bridge,  the system can  be extended  to the
PCI/VL/ISA platform  that offers top rated PCI  performance and proven
PCI-2.0 compliance. In either  case, the VT82C496G interfaces directly
with the  VT82C406MV IXP (Integrated X-bus  Peripherals) that replaces
the  multiclock  generator, the  keyboard  controller  with PS2  mouse
support, the DS-1285  style real time clock with 128  byte of CMOS RAM
and certain amount of glue logic.  Less than ten TTLs are required for
a  complete  main  board  implementation  in  addition  to  the  chips
mentioned above.

In addition  to the VL bus  controller, cache and  DRAM controller and
ISA  bus  controller  with  the  82C206  peripherals  (DMA,  interrupt
controller  and timer),  the VT82C496G  also includes  a  flexible CPU
interface, a notebook class power  management unit and a local bus IDE
controller  to   meet  the   demand  of  the   state-of-art  computing
requirement. The function block  diagram of the VT82C496G is indicated
in Figure 1. The system block  diagram of a PCI/VL/ISA system based on
the VT82C496G is indicated in Figure 2. [see datasheet]

***Configurations:...
***Features
1.  Fully IBM PC/AT Compatible
2.  Flexible CPU and Local Bus Interface
    - Supports 80486SX/DX/DX2/DX4 and compatible CPUs
    - CPU speed up to 100 Mhz including 80486DX-50, 80486DX2-66 and 
      80486DX4-100
    - Supports CPUs with write-back internal cache, e.g. P24D, P24T 
      and Cx486DX/DX2
    - Snoop filtering for write-back CPUs
    - Supports SMI protocols of Intel, AMD, TI and Cyrix CPUs
    - CPU clock stretching and throttling
    - Zero frequency and zero voltage CPU suspend
    - Soft and hard CPU reset
    - Direct VESA and other local bus interface with DMA/master access
    - Built-in arbitration for two local bus masters
3.  Advanced Cache Controller
    - Write back/write through scheme
    - Direct map scheme
    - Flexible cache size: 0K/32K/64K/128K/256K/512K/1MB
    - One bank or two banks of data independent of cache size
    - Integrated 8-bit tag comparator
    - Interleaved SRAM access to achieve 2-1-1-1 burst fill
    - Supports burst read and burst write transfers
    - System and video BIOS cacheable and write-protect
    - Programmable cache timing
    - Programmable non-cacheable region
    - Optional combined tag and alter bit SRAM for the write-back 
      scheme
    - Eight bit tag under the combined tag-alter scheme without 
      sacrifice of cacheable space
4.  Fast Page Mode DRAM Controller
    - Mixed 256K/512K/1M/2M/4M/8M/16MxN DRAMs
    - 8 banks up to 128MB
    - Flexible column and row addresses
    - 30 pin (x9) and single/double density 72 pin (x36) SIMM 
      module support
    - Programmable DRAM timing
    - BIOS shadow at 16KB increment
    - 256/384K memory relocation
    - System management memory remapping
    - Decoupled DRAM refresh with staggered RAS timing
    - CAS-before-RAS and slow refresh
5. Synchronous ISA Bus Controller
    - Synchronous ISA bus clock
    - Programmable wait state, command delay and IO recovery time
    - Bus conversion and data alignment
    - Hardware and software de-turbo control
    - Fast reset and Gate A20 operation
    - Integrated 82C206 peripheral controller
    - Edge trigger or level sensitive interrupt controller
    - Flash EPROM and combined BIOS support
6. Integrated Power Management Unit
    - Normal, conserve, doze, sleep and suspend modes
    - System event monitoring with two event classes and two idle 
      timers
    - Primary and secondary interrupt differentiation for individual 
      channels
    - One extended peripheral timer and one general purpose timer
    - Automatic conserve mode operation for short and frequent system 
      idleness
    - Modular clock and modular power
    - CPU clock stretching, throttling or stop without affecting the 
      ISA bus clock
    - Zero frequency operation with automatic resume
    - Zero volt operation with leakage control
    - Four general purpose IO or power control ports
    - APM 1.1 compliant
7.  Integrated Local Bus IDE Controller
    - 32-bit host data transfer
    - Mode-3 transfer capabilities (>10MB/s)
    - Programmable read/write, master/slave and active/recovery timing 
      in units of CPU clock
    - Prefetch and write buffers
    - Support either primary (1F0-1F7h) or secondary (170-177h) 
      channel  with two devices
    - No external logic required
8.  High Integration and Complete Functionality
    - Glueless interface with the VT82C406MV IXP (Integrated X-bus 
      Peripheral Controller, 100PQFP) to eliminate the multi-clock 
      generator, the keyboard controller with PS2 mouse, the DS-1285 
      style real time clock with extended CMOS RAM and the address 
      buffers.
    - 9 TTLs for a complete main board implementation
    - Optional VT82C505 (160 PQFP) to bridge a VL/ISA system to the 
      PCI bus
9.  0.8um high speed and low power CMOS process
10. 208-pin PQFP package

**VT82C530MV   3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M    Apollo Master, Green Pentium/P54C             <06/22/95...
**VT82C580VP   Apollo VP,  Pentium/M1/K5 PCI/ISA System      <02/15/96...
**VT82C580VPX  Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590     Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT  Apollo VP3, Single-Chip for Pentium with AGP  <10/03/97...
**VT82C598MVP  Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501       Apollo MVP4,Single-Chip 66-100MHz & AGP       <11/04/98...
**VT82C680     Apollo P6, Pentium-Pro Chip Set               <08/30/96...
**Support chips:
**VT82C505     Pentium/486 VL to PCI Bridge                  <05/30/94...
**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96...
**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
**Later P-Pro/II/III/Celeron...
**Later AMD...
**Other...
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