Micronote #035 is the classic reference on this.
The following MicroNote discusses the termination and expansion
configurations which are SUPPORTED by Digital Equipment Corporation.
These configurations will deal with 18 and 22-bit Q-bus processors,
backplanes and enclosures. Not all cases presented in this MicroNote
meet FCC regulations, and only those that do are so marked.
The MicroNote is partitioned as follows:
1. System configurations
2. Single Box expansion/termination rules.
3. Multiple box expansion/termination rules.
4. Configuration/case reference chart.
5. Supported single box configuration cases.
6. Supported multiple box configuration cases.
See
http://www.ibiblio.org/pub/academic/computer-science/history/pdp-11/hardware/micronotes/numerical/micronote35.txt for the whole article.
Tim.
Received on Thu Feb 10 2005 - 14:07:48 GMT