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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)...
*Logicstar...
*Motorola...
*OPTi...
**Other:
OPTi 82C200  - ChromaCast LCD-VGA chipset
OPTi 82C205  - LCD panel controller / scalar
OPTi 82C264  - 2D VGA controller
OPTi 82C265  - Video ????????????????????????????
OPTi 82C268  - Video ????????????????????????????
OPTi 82C611  - EIDE VLB
OPTi 82C611A - EIDE VLB
OPTi 82C621  - PCI-to-IDE controller
OPTi 82C621A - PCI-to-IDE controller 
OPTi 82C824  - FireFox PCI to PCMCIA Controller
OPTi 82C825  - FireBridge II PCI to PCMCIA Controller
OPTi 82C814  - Docking Station Controller for laptops (PCI-to-PCI bridge)
OPTi 82C842  - PCI-to-IEEE 1393 FireWire
OPTi 82C832  - ?????????????????????????????????????????
OPTi 82C861  - PCI-to-USB Bridge   c1997
OPTi 82C862  - PCI-to-USB Bridge 4x port
OPTi 82C863  - PCI-to-USB Bridge 2x port
OPTi 82C871  - PCI-to-USB Bridge + Sound Blaster compatibility and USB 2.0
OPTi 82C916  - Audio, ISA, serial CODEC) used in combination with Vendetta chipset 82C750
OPTi 82C924  - Audio, ISA
OPTi 82C925  - ISA Audio Controller (replaces the 924)
OPTi 82C928  - (MAD16) ISA Audio Controller (Emulates Sound Blaster Pro) c1993
OPTi 82C929  - (MAD16 Pro) ISA Audio Controller (Emulates Sound Blaster Pro) c1994
OPTi 82C930  - ISA Audio Controller (Emulates Sound Blaster Pro, AdLib)
OPTi 82C931  - ISA Audio controller (Emulates Sound Blaster Pro, AdLib)
OPTi 82C933  - Audio ?????????????????????????????
OPTi 82C935  - EV1935 ECTIVA MachOne PCI Audio
OPTi 82C941  - Wavetable chip, has something to do with 82C930
OPTi 82C950  - (MAD32) Audio/Modem controller (Emulates Sound Blaster Pro) c1994
OPTi 92C160  - Clock Generator for 92C168
OPTi 92C168  - LCD VGA controller c1993
OPTi 92C178  - LCD VGA controller with blt c1993
OPTi 92C264  - 2D VGA controller 

-------------------------------------------------


*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
**VT82C597/AT  Apollo VP3, Single-Chip for Pentium with AGP  <10/03/97
***Info:...
***Configurations:...
***Features:
o   PCI/ISA Green PC Ready
    - Supports separately powered 3.3V (5V tolerant) interfaces to 
      system memory, AGP, and PCI bus
    - Supports 3.3V and sub-3.3V interface to CPU
    - PC-97 compatible using VT82C586B South Bridge with ACPI Power 
      Management
o   High Integration
    - Single chip implementation for 64-bit Socket-7-CPU, 64-bit 
      system memory, 32-bit PCI and 32-bit AGP interfaces
    - Apollo VP3  Chipset: VT82C597 or VT82C597AT  system controller 
      and VT82C586B  PCI to ISA bridge
    - Chipset includes UltraDMA-33 EIDE, USB, and Keyboard / PS2-Mouse 
      Interfaces plus RTC / CMOS on chip
o   Flexible CPU Interface
    - Supports 64-bit Pentium, AMD 5k86, AMD 6k86 and Cyrix 6x86 CPUs
    - CPU external bus speed up to 66 MHz (internal 233MHz and above)
    - Supports CPU internal write-back cache
    - System management interrupt, memory remap and STPCLK mechanism
    - Cyrix 6x86 linear burst support
    - CPU NA# / Address pipeline capability
    - 4 cache lines of CPU/cache-to-DRAM post-write buffers
    - 4 quadwords of CPU/cache-to-DRAM read-prefetch buffers
o   Advanced Cache Controller
    - Direct map write back or write through secondary cache
    - Pipelined burst synchronous SRAM (PBSRAM) cache support (with 
      global write enable feature)
    - Flexible cache size: 0K / 256K / 512K / 1M / 2MB
    - 32 byte line size to match the primary cache
    - Integrated 10-bit tag comparator
    - 3-1-1-1 read/write timing for PBSRAM access at 66 MHz
    - 3-1-1-1-1-1-1-1 back to back read timing for PBSRAM access at 
      66 MHz
    - Sustained 3 cycle write access for PBSRAM access or CPU to DRAM 
      and PCI bus post write buffers at 66 MHz
    - Data streaming for simultaneous primary and secondary cache line 
      fill
    - System and video BIOS cacheable and write-protect
    - Programmable cacheable region and cache timing
o   AGP Controller
    - AGP v1.0 compliant
    - Supports SideBand Addressing (SBA) mode (non-multiplexed 
      address/data)
    - Supports 133MHz 2X mode for AD and SBA signalling
    - Pipelined split-transaction long-burst transfers up to 533 MB/
      sec
    - Eight level read request queue
    - Four level posted-write request queue
    - Thirty-two level (quadwords) read data FIFO (128 bytes)
    - Sixteen level (quadwords) write data FIFO (64 bytes)
    - Intelligent request reordering for maximum AGP bus utilization
    - Supports Flush/Fence commands
o   GART
    - One level TLB structure
    - Sixteen entry fully associative page table
    - LRU replacement scheme
    - Independent GART lookup control for host / AGP / PCI master 
      accesses
o   Intelligent PCI Bus Controller
    - PCI buses are synchronous to host CPU bus
    - 33 MHz operation on the primary PCI bus
    - 66 MHz PCI operation on the AGP bus
    - PCI-to-PCI bridge configuration on the 66MHz PCI bus
    - Separate data buffers for the two PCI buses
    - Peer concurrency
    - Concurrent multiple PCI master transactions;  i.e., allow PCI 
      masters from both PCI buses active at the same time
    - Allows PCI master access while ISA master/DMA is active
    - PCI master snoop ahead and snoop filtering
    - Five levels (double-words) of CPU to PCI posted write buffers
    - Byte merging in the write buffers to reduce the number of PCI 
      cycles and to create further PCI bursting possibilities
    - Zero wait state PCI master and slave burst transfer rate
    - PCI to system memory data streaming up to 132Mbyte/sec
    - Enhanced PCI command optimization (MRL, MRM, MWI, etc.)
    - Forty-eight levels (double-words) of post write buffers from PCI 
      masters to DRAM
    - Sixteen levels (double-words) of prefetch buffers from DRAM for 
      access by PCI masters
    - Supports L1/L2 write-back forward to PCI master read to minimize 
      PCI read latency
    - Supports L1/L2 write-back merged with PCI master post-write to 
      minimize DRAM utilization
    - Transaction timer for fair arbitration between PCI masters 
      (granularity of two PCI clocks)
    - Symmetric arbitration between Host/PCI bus for optimized system 
      performance
    - Complete steerable PCI interrupts
    - PCI-2.1 compliant, 32 bit 3.3V PCI interface with 5V tolerant 
      inputs
o   Advanced High-Performance DRAM Controller
    - 66MHz DRAM interface
    - Concurrent CPU and AGP access
    - FP, EDO, SDRAM, and SDRAM-II
    - 66MHz DDR (Double Data Rate) supported for SDRAM-II
      (supports central and edge DQ, bidirectional DS, and optional 
      SDR write)
    - Different DRAM types may be used in mixed combinations
    - Different DRAM timing for each bank
    - Mixed 1M / 2M / 4M / 8M / 16MxN DRAMs
    - 6 banks up to 1GB DRAMs
    - Flexible row and column addresses
    - 64-bit data width only
    - 3.3V DRAM interface with 5V-tolerant inputs
    - Optional bank-by-bank ECC (single-bit error correction and 
      multi-bit error detection) or EC (error checking only) for DRAM 
      integrity
    - Two-bank interleaving for 16Mbit SDRAM support
    - Two-bank and four bank interleaving for 64Mbit SDRAM support 
      (14 MA lines)
    - Supports maximum 8-bank interleave (i.e., 8 pages open 
      simultaneously);  banks are allocated based on LRU
    - Seamless DRAM command scheduling for maximum DRAM bus utilization
      (e.g., precharge other banks while accessing the current bank)
    - Four cache lines (16 quadwords) of CPU/cache to DRAM write 
      buffers
    - Concurrent DRAM writeback
    - Read around write capability for non-stalled CPU read
    - Burst read and write operation
    - 5-2-2-2 on page, 8-2-2-2 start page and 11-2-2-2 off page timing 
      for EDO DRAMs at 66 MHz
    - 6-1-1-1 on page, 8-1-1-1 start page and 10-1-1-1 off page for 
      SDRAMs at 66 MHz
    - 5-2-2-2-3-2-2-2 back-to-back accesses for EDO DRAM at 66 MHz
    - 6-1-1-1-3-1-1-1 back-to-back accesses for SDRAM at 66 MHz
    - BIOS shadow at 16KB increment
    - Decoupled and burst DRAM refresh with staggered RAS timing
    - Programmable refresh rate, CAS-before-RAS refresh and refresh on 
      populated banks only
o   Built-in NAND-tree pin scan test capability
o   3.3V, 0.5um, high speed / low power CMOS process
o   472 pin BGA Package
o   Alternate pinouts available to optimally accommodate different PCB 
    form factors
    - VT82C597 for ATX and NLX
    - VT82C597AT for Baby AT and ATX

**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...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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