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*OPTi...
**82C693/6/7     Pentium uP Write Back Cache EISA                 c:93
***Notes:...
***info:
The OPTi EISA Pentium chipset consists of two 208-pin QFP devices: the
SYSC, the BUSC and 2 100-pin DBC buffer chips.

The SYSC  write back-memory cache  controller - 82C693 -  controls the
memory  subsystem for EISA  bus controller  accesses between  the CPU,
EISA/ISA masters and DMA devices.  The memory subsystem consists of up
to 8 banks of DRAM with hidden  refresh and from 128K to 1 MB of write
back cache  translates bus control  signals and addresses  between the
CPU, EISA, ISA and DMA masters and slaves.

The BUSC  - 82C696 - integrates  the motherboard I/O  logic defined by
the EISA specification: two  8254 timers, EISA NMI/time-out logic, two
EISA 8259 interrupt controllers, a  32-bit DMA controller and the EISA
system arbiter.

The  Data  Bus Controller  -  82C697  -  integrates data  buffers  and
provides  control for  synchronous data  pipelining. It  also provides
control for bus conversion, Parity generation and checking and an EISA
ID register.  The high  levels of integration and performance provided
by these 4 devices enable OEMs  to plan the evolution of their Pentium
PC/ATs  to  EISA/PCs.   This   chipset  enables  OEMs  to  move  ahead
aggressively  with  high  performance   EISA  platforms  in  order  to
participate successfully in the migration of 32-bit PCs to EISA.

***Configurations:...
***Features:...
**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...
**85C401/402     ISA 486DX/SX Cache chipset    [no datasheet]        ?
***Notes:...
**85C406/5/411/420/431  EISA 386/486 Chipset   [no datasheet]      c91...
**85C460         ISA 386DX/486 Single Chip     [no datasheet]        ?
**85C461         ISA 386DX/486 Single Chip     [no datasheet]        ?...
**85C471/407     Green PC ISA-VLB 486 Single Chip                  <94...
**85C496/497     486-VIP 486 Green PC VESA/ISA/PCI Chipset         <95...
**85C501/502/503 Pentium/P54C PCI/ISA Chipset                <01/09/95...
**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...
**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...
**SL9252   80386SX System and Memory Controller              <06/12/90
***Info:
VIA’s  System and  Memory Controller  SL9252,  has the  logic for  the
System Control, Memory Control, Data  Control and chip select for some
of  the  peripherals  used  in  an  AT system.  The  device  is  fully
configurable via software. No  external hardware jumpers are needed to
utilize its features.  Default values are provided to  boot any system
configuration. On reset, BIOS routines are used to program the device,
transparent to the user, to utilize its special features.

Four configuration  registers in the System Control  Logic control the
AT bus and peripheral bus Operations. Synchronous and asynchronous bus
operations are  supported. In synchronous  mode, bus clock  is derived
from the processor's CLK2. In asynchronous mode, it is derived from an
independent external bus clock pin.

Support for page mode  and non-page mode operation with non-interleave
or  word  /  multi-page  interleave, along  with  programmable  memory
timing, allow the  system designer to get maximum  performance for the
chosen DRAMs. High drive for RAS, CAS, memory address, and write lines
are provided to  connect SL9252 directly to a  large DRAM memory array
without  external buffering.  In addition,  CAS for  all the  banks in
non-interleave and  2-way interleave  are provided to  reduce external
gates.

Shadowing  features are  supported  in 16K  granularity  from 640K  to
1M. Remap  options allow shadowing of eight  different combinations of
top of memory, Local ROM, and Video ROM to 64oK to 1M region.

VIA's System  and Memory  Controller, SL9252, can  be used  with VIA's
SL9020  Data Controller, or  with discrete  latches and  buffers. Data
direction and enable signals for  the data controller are provided for
both modes of operation.

SL9252  provides  decoding  for  the  Real  Time  Clock  and  Keyboard
Controller, thus avoiding external decoding gates. In addition, Port B
logic, PS/2 Compatible Port 92 for fast reset, and A20GATE provide the
necessary logic support for a one-chip solution.

***Versions:...
***Features:...
**SL9350   80386DX Page Mode Memory Controller (16-25MHz 16MB)       ?...
**SL9351   80386DX Page Interleave Memory Controller (33MHz)         ?...
**SL9352   80386DX System and Memory Controller              <06/12/90...
**SLXXXX   Other chips...
**
**VT82C470     "Jupiter", Chip Set (w/o cache) 386 [no datasheet]    ?
**VT82C475     "Jupiter", Chip Set (w/cache) 386   [no datasheet]    ?
**VT82C486/2/3 "GMC chipset"            [no datasheet, some info]    ?...
**VT82C495/480 "Venus" Chip Set                    [no datasheet]    ?
**VT82C495/491 ? EISA Chip Set          [no datasheet, some info]  <93...
**VT82C496G    Pluto, Green PC 80486 PCI/VL/ISA System       <05/30/94...
**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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