3031 is the N100 bus controller.
|This article is a stub. You can improve NDWiki by expanding it.|
What does it do?
Switches and indicators
- short timeout indicator (lit if short timeout is selected)
- timeout selector
- short timeout (2 mS)
- long timeout (8 mS)
A BUSC controlling a memory bank should have a short timeout. A BUSC controlling an I/O bus should have a long timeout.
- ADOK - Address OK indicates which bank the last master-bus cycle was accessing. It is reset by start of next master-bus memory cycle.
- extended device number switch
- interleave selector
- device number
- Base-setting display
- Upper-limit display
- Lower-limit display
- Base address switches
- Upper limit switches
- Lower limit switches
For Base, Upper and Lower limit switches: the most-significant switch is topmost, and the least-significant switch is closest to the bottom of the card. The address area for a bus controller is decided by the setting of lower and upper address limit. The limit-address increments are 64K units.
The A and B connectors are used for I/O, the C connector is used for the ND-100 Bus.
I/O Devices on the card
- Norsk Data Document ND–30.008.3 EN ND-100 Hardware Maintenance , page 206