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08 November 2014, 14:09
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#1 |
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Zone Friend
Join Date: Aug 2002
Location: Belgium
Age: 51
Posts: 1,296
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Where are pins 12 and 83 on a RAMSEY chip
trying to check some mainboard memory issue but have no f'ing clue where to start counting the pin numbers!
 Anyone has an idea? click on this link to see a photo with colour codes I made: https://plus.google.com/110332344341...ts/edLiQfnd5cX I assume RED dot = pin 1 in the middle (actually pin 12 if you start counting from the left) YELLOW dot = pin 12 ? (right side 12 > 32 ?) BLUE dot = pin 54 (bottom side 33 > 54 ?) PINK dot = pin 76 (left side 55 > 76 ?) so top side = pins 77 > 84 (left portion) + pins 1 > 11 (right portion) anyone can confirm this? |
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08 November 2014, 15:33
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#2 |
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Registered User
Join Date: Jul 2014
Location: Ottawa/Canada
Posts: 49
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Count anti-clockwise starting from the dot which is pin 1.
It is the same way for DIP, PLCC etc. |
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08 November 2014, 16:29
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#3 |
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Zone Friend
Join Date: Aug 2002
Location: Belgium
Age: 51
Posts: 1,296
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ok, so the pink dot is next to pin 11?
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08 November 2014, 16:41
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#4 |
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Registered User
Join Date: Jul 2014
Location: Ottawa/Canada
Posts: 49
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Yes. Pink is close to pin 11
http://www.amiga-stuff.com/hardware/pinnumbering.html |
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10 November 2014, 13:16
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#5 |
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Zone Friend
Join Date: Aug 2002
Location: Belgium
Age: 51
Posts: 1,296
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all good, found the pins and it showed all my traces to my mobo RAM are ok
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