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*Chips & Technologies...
*Contaq  . . . . . [no datasheets, some info]...
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**450NX  (?)            06/29/98:
Chips:
[82454NX] (PXB) [82453NX] (MUX) 
[82452NX] (RCG) [82451NX] (MIOC) 
[82371EB] (PIIX4E),                            
CPUs:          Single/Dual/Quad P-II Xeon/P-III Xeon
DRAM Types:    FPM EDO 2-way Interleave 4-way Interleave
Mem Rows:      8
DRAM Density:  16Mbit 64Mbit
Max Mem:       8GB
ECC/Parity:    Both
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3


**?????  (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)...
**Other:
TACT82206  I/O controller (Possibly compatible with C&T 82206)
TACT82300   Not sure if it actually exists.
TACT8230   Not sure if it actually exists.
PCI1050    PCI-to-PC Card Controller
PCI10xx    PCI-to-PC Card16 Controller
PCI1130    PCI-to-PC CardBus Controller
PCI20xx    PCI-to-PCI Bridge

*UMC...
*Unresearched:...
*VIA...
**SL9251   80386SX Page Interleave Memory Controller         <04/13/90
***Info:...
***Versions:...
***Features:...
**SL9252   80386SX System and Memory Controller              <06/12/90...
**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
***Notes:...
***Info:
The  VT82C680  Apollo-P6 is  a  high  performance, cost-effective  and
energy efficient  chip set for  the implementation of  PCI/ISA desktop
and  notebook personal  computer systems  based  on the  64 bit  Intel
Pentium-Pro  super-scalar  processors.   The chipset  supports  multi-
Pentium-Pro configuration  with Intel GTL+ driver  and receiver inter-
face up  to 66 MHz external  CPU bus speed.  The  chipset supports the
Pentium-Pro CPU multi-phase bus protocols for split transactions, four
level deep  in-order queue and  deferred transactions for  optimal CPU
throughput.

The VT82C680 chip set consists  of the VT82C685 system controller, the
VT82C687 data buffer and the  VT82C586 PCI to ISA bridge. The VT82C680
supports six banks  of DRAMs up to 1 GB.  The DRAM controller supports
Standard Page Mode DRAM, EDO-DRAM, Burst EDO-DRAM and Synchronous DRAM
in a  flexible mixed/match manner. The Burst-EDO  and Synchronous DRAM
allows zero wait state bursting between the DRAM and the VT82C687 data
buffers at  66 MHz. The six  banks of DRAM allow  arbitrary mixture of
1M/2M/4M/8M/16MxN  DRAMs  with optional  bank-by-bank  ECC and  parity
support. The chipset supports sixteen level (quadwords) of CPU to DRAM
write  buffers and  sixteen  level  (quadwords) of  DRAM  to CPU  read
buffers to  maximize the CPU bus  and DRAM utilization.  The peak data
transfer rate for the EDO and Synchronous DRAM (or Burst EDO) DRAMs is
266 MB/s and 532 MB/s, respectively.

The VT82C680 supports 3.3/5v 32 bit PCI bus with 64 bit to 32 bit data
conversion.  Sixteen levels  (doublewords) of  post write  buffers are
included to  allow for concurrent  CPU and PCI  operation. Consecutive
CPU addresses  are converted into  burst PCI cycles with  Byte merging
capability  for  optimal  CPU   to  PCI  throughput.  For  PCI  master
operation,  sixteen levels  (doublewords)  of post  write buffers  and
thirty-two levels  (doublewords) of prefetch buffers  are included for
concurrent PCI bus and  DRAM/cache accesses. The chipset also supports
enhanced    PCI    bus     commands    such    as    Memory-Read-Line,
Memory-Read-Multiple  and  Memory-Write-Invalid  commands to  minimize
snoop overhead.  In addition,  the chipset supports  advanced features
such as  snoop ahead, snoop  filtering, CPU write-back forward  to PCI
master  and CPU  write-back  merged  with PCI  post  write buffers  to
minimize PCI  master read latency  and DRAM utilization.  The VT82C586
PCI to ISA bridge supports  four levels (doublewords) of line buffers,
type F DMA transfers and  delay transaction to allow efficient PCI bus
utilization (PCI-2.1 compliant). The VT82C586 also includes integrated
keyboard controller  with PS2 mouse support,  integrated DS12885 style
real time  clock with  extended 128 Byte  CMOS RAM,  integrated master
mode enhanced  IDE controller with full scatter  and gather capability
and extension  to 33 MB/sec UltraDMA-33 transfer  rate, integrated USB
interface with root hub and  two function ports with built-in physical
layer transceiver, and OnNow/ACPI compliant advanced configuration and
power management  interface. A complete main board  can be implemented
with only six TTLs.

The VT82C680 is ideal for  high performance, high quality, high energy
efficient and  high integration desktop and  notebook PCI/ISA computer
systems.

***Configurations:...
***Features:...
**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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*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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