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The Mariah chip set, an improvement
on the Rigel chip set, was manufactured in 1.0 micrometer CMOS technology.
The VAX 6500 processor delivered approximately 13 times the power
of a VAX-11/780 system, per processor. The 6500 systems (shown here)
implemented a new cache technique called write-back cache, which
reduced CPU-to-memory traffic on the system bus, allowing multiprocessor
systems to operate more efficiently.
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VAX 6000 Model 500 specifications
| Relative Performance x VAX-11/780 (1 MIP) |
13 |
| Technology |
CMOS-3 |
| In-cabinet CPU Upgrade Kit |
Upgrades to any higher VAX 6000 system |
| Number of Processors |
1 |
| Maximum Vector Processors Supported |
4 |
| Peak Vector Performance per Processor |
45 MFLOPS (double precision)
90 MFLOPS (single precision) |
| Maximum Memory Support |
512 MB |
| Maximum Disk Capacity |
Over 8 TB |
| VAXcluster I/O Servers |
Up to 124 |
| Maximum I/O Throughput |
80 MB/s |
| Bus Type |
1 XMI, 4 CI
12 DSSI, 2 FDDI
5 VAXBI, 2 VME |
| LAN Support |
Standard |
| Ethernet Adapters |
Up to 6 |
| CI VAXcluster System Support |
Optional |
| DSSI VAXcluster System Support |
Optional |
| Ethernet VAXcluster System Support |
Optional |
| FDDI VAXcluster Support |
Optional |
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Open VMS
ULTRIX |
| Floating Point Accelerator |
Standard |
| Floating Point Data Types |
F, D, G, H |
| Cache Size |
2 KB on chip
512 KB on board |
| Cycle Time |
16 ns |
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