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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...
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*OPTi...
**82C822         PCIB (VLB-to-PCI bridge)                         c:94
***Notes:
OPTi 82C822 is a VLB-to-PCI bridge compatible with many chipsets.

From some Usenet posting (lost source sorry):

"Opti never  had a 486 PCI  chipset. All mainboards  with the chipsets
82C802,   82C895,    82C571,   82C596   (aka    "Premium")   use   the
VLB-->PCI-bridge  "chipset"  82C822  for  the  implementation  of  PCI
functionality.

Apparently this  chipset will only  allow 1 32-bit burst  transfer per
bus arbitration  cycle, which limits  throughput to 8 MB/s  instead of
(the maximum ideal transfer rate of) 132 MB/s."


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**TACT82000   3-Chip 286 [no datasheet]                            c89
***Notes:...
**TACT82411   Snake  Single-Chip AT Controller                     c90...
**TACT82S411  Snake+ Single-Chip AT Controller [no datasheet]      c91...
**TACT83000   AT 'Tiger' Chip Set (386)                            c89...
**TACT84500   AT Chip Set (486, EISA) [no datasheet, some info]    c91...
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