ND-100 Bus

In the NORD-100 computer system all hardware modules are connected together via a common bus, the NORD-100 bus. All communication between NORD-100 modules is provided by this bus, except CPU, MMS and Cache communication. Therefore, the NORD-100 bus is general purpose, to allow all classes of NORD-100 modules simply to be "plugged" into the system.

Physical arrangement

The NORD-100 bus is available as a printed (card) backplane. The backplane is available in two versions containing either 12 or 21 positions for module connections. The two versions are otherwise equal.

Signals

Each NORD-100 bus backplane position contains a total of 96 lines (power and ground lines included).

Expansion

NORD-100 card crates can be linked together via bus expander (BEX) modules. The number of crates to be lined together is set to a theoretical maximum of 8 crates.

References

• Norsk Data Document ND–06.016.01 ND-100 INPUT/OUTPUT SYSTEM
• Norsk Data Document ND–06.017.02 ND-100 BACKPLANE
• Norsk Data Document ND–06.026.1 ND-110 Functional Description , Chapter 4