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-   -   Where are pins 12 and 83 on a RAMSEY chip (http://eab.abime.net/showthread.php?t=75734)

dirkies 08 November 2014 15:09

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! :banghead

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?

K.C.Lee 08 November 2014 16:33

Count anti-clockwise starting from the dot which is pin 1.
It is the same way for DIP, PLCC etc.

dirkies 08 November 2014 17:29

ok, so the pink dot is next to pin 11?

K.C.Lee 08 November 2014 17:41

Yes. Pink is close to pin 11
http://www.amiga-stuff.com/hardware/pinnumbering.html

dirkies 10 November 2014 14:16

all good, found the pins and it showed all my traces to my mobo RAM are ok :)


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