https://www.ndwiki.org/index.php?action=history&feed=atom&title=30393039 - Revision history2026-05-06T07:55:06ZRevision history for this page on the wikiMediaWiki 1.43.8https://www.ndwiki.org/index.php?title=3039&diff=4555&oldid=prevTingo: created 3039 page2018-01-14T17:48:26Z<p>created 3039 page</p>
<p><b>New page</b></p><div>'''3039''' is the ND-100 bus controller.<br />
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==Introduction==<br />
What does it do?<br />
<br />
==Switches and indicators==<br />
* short timeout indicator (lit if short timeout is selected)<br />
* timeout selector<br />
** short timeout (2 mS)<br />
** long timeout (8 mS)<br />
A BUSC controlling a memory bank should have a short timeout. A BUSC controlling an I/O bus should have a long timeout.<br />
* ADOK - Address OK indicates which bank the last master-bus cycle was accessing. It is reset by start of next master-bus memory cycle.<br />
* extended device-number switch<br />
* interleave selector<br />
* device number<br />
* Base-setting display<br />
* Upper-limit display<br />
* Lower-limit display<br />
* Base address switches<br />
* Upper limit switches<br />
* Lower limit switches<br />
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.<br />
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==Connectors==<br />
The A and B connectors are used for I/O, the C connector is used for the [[ND-100 Bus]].<br />
<br />
==I/O Devices on the card==<br />
none?<br />
<br />
==References==<br />
*{{ND-doc|30.008.3 EN}}, page 221<br />
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[[Category:ND-100 hardware]]</div>Tingo