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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."
***Info:...
***Versions:...
***Features:
o Fully compliant to the PCI V2.0 Specification
o Up to four PCI masters
o Supports system operational speeds of 25, 33, 40, and 50MHz
o Provides central arbiter to arbitrate the bus requests between:
- host CPU
- PCI masters
- DMA/ISA masters
- Refresh
o Offers programmable priority scheme for both the central arbiter
and DMA channels:
- Fixed
- Rotating
- Fixed/Rotating combination
o Burst mode PCI accesses to local memory support
o Combine host CPU sequential writes into PCI burst write cycles
o Interfaces with all OPTi's VL chipset solutions
o Single 208-pin PQFP (Plastic Quad Flat Pack)
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
**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...
**Other:...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...
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