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All VAX 4000 Model 300
base system components are housed in a BA440 enclosure, which contains
a 12-slot backplane.
Each base system contains the following:
- A KA670-AA/-BA (L4000-A/-B) central processing
unit (CPU) module
- From one to four MS670-BA or -CA memory modules.
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The base system modules
are located in the following BA440 card slots
- Any MS670 memory modules are installed in slots 1 through
4.
- The KA670 CPU module is installed in slot 5.
The base system operates from the KA670 CPU firmware and the controls
on the console module. Base system operation also integrates Digital
Storage Systems Interconnect (DSSI) technology.
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VAX 4000 Model 300 Specifications
| Relative Performance x VAX-11/780 (1 MIP) |
8.0 |
| Technology |
CMOS |
| In-cabinet CPU Upgrade Kit |
Upgrades to VAX 4000 Model 500 |
| Number of Processors |
1 |
| Maximum Vector Processors Supported |
N/A |
| Peak Vector Performance per Processor |
N/A |
| Maximum Memory Support |
256 MB |
| Maximum Disk Capacity |
42 GB |
| VAXcluster I/O Servers |
N/A |
| Maximum I/O Throughput |
8 MB/s (1 DSSI)
3.3 MB/s (Q-bus) |
| Bus Type |
4 DSSI
2 Q-bus |
| LAN Support |
Standard |
| Ethernet Adapters |
Up to 3 |
| CI VAXcluster System Support |
N/A |
| DSSI VAXcluster System Support |
Optional |
| Ethernet VAXcluster System Support |
Optional |
| FDDI VAXcluster Support |
N/A |
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Open VMS |
| Floating Point Accelerator |
Standard |
| Floating Point Data Types |
F, D, G, H |
| Cache Size |
2 KB on chip
128 KB on board |
| Cycle Time |
28 ns |
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