https://www.ndwiki.org/index.php?action=history&feed=atom&title=Standard_NORD-1_card_formatStandard NORD-1 card format - Revision history2026-06-14T01:36:10ZRevision history for this page on the wikiMediaWiki 1.43.8https://www.ndwiki.org/index.php?title=Standard_NORD-1_card_format&diff=3175&oldid=prevGandalf: Initial page.2016-07-13T10:16:16Z<p>Initial page.</p>
<p><b>New page</b></p><div>All cards in the [[NORD-1]] CPU and I/O crate share a '''standard card format'''. It is most probably also used in the [[NORD-2B]] and [[NORD-4]] CPU:s too.<br />
[[Image:NORD-1 standard card-c.jpg |300px | thumb | Component side.]]<br />
[[Image:NORD-1 standard card-s.jpg |300px | thumb | Solder side.]]<br />
[[Image:NORD-1 card 151-c.jpg |300px | thumb | Component side of the 151 Time counter card.]]<br />
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==Introduction==<br />
The card is 156x127 mm in size with a protruding edge contact 8x122 mm. The gold plated edge contact have 30 contact points per side with 1 and 59 holding VCC at +5V and GND at 2 and 60.<br />
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The card has a common set of via holes in a fixed pattern of 20 rows of 48 holes. What differentiates the various cards is the wiring between the edge contacts and the via holes.<br><br />
There are no solder mask or silk screen on the cards so components are identified by their position in a grid format of A-D and 1-19. The rows are printed on the cards but not the columns where A is the first column closes to the edge contact and D is the one at the front of the card crate. In logic drawings the coordinates and pin numbers are marked on the logic symbol.<br><br />
Circles with a number in it is the edge contact.<br />
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The maximum numbers of IC:s on a board is 32.<br />
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==Reference==<br />
<references/><br />
* Hardware in [[NORD-1 Serial 47]]<br />
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[[Category:NORD-1 hardware]]</div>Gandalf