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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...
**82C499         DXSC DX System Controller                        c:93
***Info:
The  OPTi  82C499 provides  a  highly  integrated  solution for  fully
compatible, high-performance  PC/AT platforms. This  chip will support
the  Intel  486SX/DX/DX2/487SX,   Intel  386DX  and  IBM/Cyrix  486DLC
microprocessors in the most cost effective and power efficient designs
available today.  Since  the device is so critical  to the performance
and cost structure  of a PC, this highly  integrated approach provides
the foundation for a very cost effective platform without compromising
performance.  For  power users,  this chip offers  optimum performance
for  systems  running up  to  50MHz. The  OPTi  DXSC  chip provides  a
solution  positioned  to deliver  value,  without neglecting  quality,
compatibility, or reliability.

The  82C499 integrates  a write-back  cache controller,  a  local DRAM
controller,  an integrated  peripherals controller  (82C206),  the CPU
state machine,  the AT bus  state machine, and  data buffers all  in a
single 208-pin PFP.  New on-chip hardware provides the  hooks for OPTi
and VESA local bus device support.

***Configurations:
82C499
82C499 + 82C602

The 82C602  is a Buffer device  (The 602 datasheet mentions  it can be
used with this chipset)

Other observed configurations:
82c499 + SMC 651 c:93
82c499 + C&T 711 
82c499 + C&T 721 c:93

***Features:...
**82C546/547     Python PTM3V                                     c:94...
**82C556/7/8     Viper [no datasheet]                                ?...
**82C556/7/8N    Viper-N  Viper Notebook Chipset             <05/25/95...
**82C556M/7M/8E  Viper-N+ Viper Notebook Chipset                  c:96...
**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...
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