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**82C693    PCI-ISA Bridge [no datasheet]                            ?
referenced in:http://web.mit.edu/netbsd/src/sys/dev/pci/pcidevs

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**?????  (Profusion)    c:99
Chips:         
Memory Access Controller (MAC)  
Data Interface Buffer (DIB)
CPUs:          8x P-III Xeon Oct
DRAM Types:    SDRAM PC100 2-way Interleave dual channel
Max Mem:       32GB
ECC/Parity:    ECC
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3 PCI-66/64



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**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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